The document discusses the anatomy of the face, including muscles and nerves. It notes that the face lacks a deep fascia, allowing for greater mobility of facial muscles. The principal muscles described are the orbicularis oris (surrounding the mouth), orbicularis oculi (eyelids), and buccinator (cheeks). These muscles are supplied by branches of the facial nerve and allow for facial expressions. The trigeminal nerve provides sensory innervation to different regions of the face via its ophthalmic, maxillary, and mandibular branches. Veins in the face connect to drainage pathways in the neck and skull.
The document summarizes the facial muscles, describing their origins, insertions, and actions. It lists the major groups of facial muscles as: muscles of the scalp, eyelid, nose, mouth, and other areas. Within each group it describes individual muscles such as the occipitofrontalis muscle of the scalp, the orbicularis oculi muscle of the eyelid, and the buccinator muscle of the mouth. It provides details on each muscle's structure and role in facial expressions.
The document describes the facial muscles, including their origins, insertions and actions. It lists and provides details on the muscles of the scalp, eyelids, nose, mouth and other areas. The orbicularis oculi, corrugator supercilii, levator palpebrae superioris and other orbital muscles are described. The document also outlines the nasal muscles like the nasalis and dilatator naris muscles. The oral group includes the orbicularis oris, buccinator and muscles that depress or elevate parts of the lips and mouth.
The face has skin, superficial fascia containing muscles and vessels, and no deep fascia allowing facial expression. The skin is thick and vascular. Fat pads are present in cheeks but absent in eyelids. Muscles of facial expression in the forehead include the frontalis, corrugator supercilii, and procerus. Around the eyes are the orbicularis oculi and levator palpebrae superioris. Nasal muscles are the nasalis and depressor septi. Muscles around the mouth include the orbicularis oris and buccinator. The face is innervated by the facial nerve and supplied by the facial artery. Lymphatic drainage involves preauricular, superficial parotid
The document summarizes the mimetic muscles of the face, which are also called the facial expression muscles. It describes the various muscle groups - the orbicular group, nasal group, oral group, and others. It provides details on individual muscles like the orbicularis oculi, corrugator supercilii, zygomaticus major, and platysma. It also discusses the nerve supply of these muscles from the facial nerve and its branches.
The face consists of soft tissue over facial bones. It contains the forehead, eyes, nose, mouth, and surrounding areas. The skin of the face has sweat and sebaceous glands and is connected to underlying bones by loose connective tissue containing muscles. The muscles of the face originate from skull bones and insert into the skin. They serve to open and close the eyelids, nostrils, and lips. The face is supplied by branches of the trigeminal, facial, and cervical nerves and arteries including the facial artery.
The occipitofrontalis muscle consists of four bellies that arise from the occipital bone and eyebrow and connect via an aponeurosis. The facial muscles are arranged in groups around the eye, nose, and mouth and produce facial expressions by pulling on the skin. The buccinator muscle compresses the cheeks and lips against the teeth to prevent food accumulation in the mouth.
This document discusses the muscles of facial expression. It begins by introducing the importance of understanding these muscles for prosthodontists to restore natural facial functions. It then classifies the muscles into those of the scalp, eyelid, nose, mouth and ear. For each group, the document identifies the individual muscles and provides details on their origin, insertion and action. The overall purpose is to describe the anatomy of facial muscles for prosthodontic applications.
The face is supplied by a rich vascular network. The facial artery is the main blood vessel and gives off branches that supply the different regions of the face. The facial vein drains the face and connects with the cavernous sinus, making the upper lip and lower nose dangerous areas for infections. The face has a dense network of lymphatic vessels that drain to preauricular, submandibular, and submental lymph nodes. The facial nerve innervates all the facial muscles to allow for facial expressions.
The document summarizes the facial muscles, describing their origins, insertions, and actions. It lists the major groups of facial muscles as: muscles of the scalp, eyelid, nose, mouth, and other areas. Within each group it describes individual muscles such as the occipitofrontalis muscle of the scalp, the orbicularis oculi muscle of the eyelid, and the buccinator muscle of the mouth. It provides details on each muscle's structure and role in facial expressions.
The document describes the facial muscles, including their origins, insertions and actions. It lists and provides details on the muscles of the scalp, eyelids, nose, mouth and other areas. The orbicularis oculi, corrugator supercilii, levator palpebrae superioris and other orbital muscles are described. The document also outlines the nasal muscles like the nasalis and dilatator naris muscles. The oral group includes the orbicularis oris, buccinator and muscles that depress or elevate parts of the lips and mouth.
The face has skin, superficial fascia containing muscles and vessels, and no deep fascia allowing facial expression. The skin is thick and vascular. Fat pads are present in cheeks but absent in eyelids. Muscles of facial expression in the forehead include the frontalis, corrugator supercilii, and procerus. Around the eyes are the orbicularis oculi and levator palpebrae superioris. Nasal muscles are the nasalis and depressor septi. Muscles around the mouth include the orbicularis oris and buccinator. The face is innervated by the facial nerve and supplied by the facial artery. Lymphatic drainage involves preauricular, superficial parotid
The document summarizes the mimetic muscles of the face, which are also called the facial expression muscles. It describes the various muscle groups - the orbicular group, nasal group, oral group, and others. It provides details on individual muscles like the orbicularis oculi, corrugator supercilii, zygomaticus major, and platysma. It also discusses the nerve supply of these muscles from the facial nerve and its branches.
The face consists of soft tissue over facial bones. It contains the forehead, eyes, nose, mouth, and surrounding areas. The skin of the face has sweat and sebaceous glands and is connected to underlying bones by loose connective tissue containing muscles. The muscles of the face originate from skull bones and insert into the skin. They serve to open and close the eyelids, nostrils, and lips. The face is supplied by branches of the trigeminal, facial, and cervical nerves and arteries including the facial artery.
The occipitofrontalis muscle consists of four bellies that arise from the occipital bone and eyebrow and connect via an aponeurosis. The facial muscles are arranged in groups around the eye, nose, and mouth and produce facial expressions by pulling on the skin. The buccinator muscle compresses the cheeks and lips against the teeth to prevent food accumulation in the mouth.
This document discusses the muscles of facial expression. It begins by introducing the importance of understanding these muscles for prosthodontists to restore natural facial functions. It then classifies the muscles into those of the scalp, eyelid, nose, mouth and ear. For each group, the document identifies the individual muscles and provides details on their origin, insertion and action. The overall purpose is to describe the anatomy of facial muscles for prosthodontic applications.
The face is supplied by a rich vascular network. The facial artery is the main blood vessel and gives off branches that supply the different regions of the face. The facial vein drains the face and connects with the cavernous sinus, making the upper lip and lower nose dangerous areas for infections. The face has a dense network of lymphatic vessels that drain to preauricular, submandibular, and submental lymph nodes. The facial nerve innervates all the facial muscles to allow for facial expressions.
This document provides an overview of the orofacial musculature. It begins with brief introductions to the muscles of the scalp, auricle, eye, nose and around the mouth. It then discusses the muscles of mastication and tongue in more detail. The key muscles described include the occipitofrontalis and temporoparietalis muscles of the scalp, the auricularis anterior, superior and posterior muscles of the auricle, the extraocular muscles that move the eyeball and levator palpebrae superioris that moves the eyelid, and the orbicularis oris that acts as a sphincter around the mouth. Applied aspects and conclusions are also mentioned.
This document discusses the muscles of facial expression. It begins with an introduction on the embryological development and classification of these muscles. It then describes each muscle in detail, including origin, insertion, innervation, artery, and action. The major muscles described include the orbicularis oculi and orbicularis oris, which close the eyelids and purse the lips, as well as the buccinator and platysma, which assist with facial movements and expressions. The document concludes with references used.
The facial muscles are divided into 3 groups - muscles of the upper face, midface, and lower face. The upper face muscles include the orbicularis oculi, corrugator supercilii, frontalis, and procerus. The midface muscles include the nasalis, levator labii superioris alaeque nasi, levator labii superioris, zygomaticus minor, zygomaticus major, and levator anguli oris. The lower face muscles are the buccinator, orbicularis oris, depressor labii inferioris, depressor anguli oris, and mentalis. Contraction of these muscles produces facial expressions and wrinkles that can develop with
The facial muscles are responsible for facial expressions and are more complex in humans than other animals. They originate from mesoderm and are supplied by the facial nerve. The facial muscles can be categorized based on their location around the eyes, nose, lips, and mouth. The main functions of these muscles include facial expression and maintaining openings of the eyes, nose, and mouth.
Face is the most prominent part of the body
Facial muscles also known as the ‘mimetic muscles’, represent remnants of the ‘Panniculus Carnosus’ ,continuous subcutaneous muscle sheet seen in some animals.
Facial Musculature are the only somatic muscles in the body attached on one side to the bone and the other side to the skin; thus specialized for expression
Face is the most prominent part of the body
Facial muscles also known as the ‘mimetic muscles’, represent remnants of the ‘Panniculus Carnosus’ ,continuous subcutaneous muscle sheet seen in some animals.
Facial Musculature are the only somatic muscles in the body attached on one side to the bone and the other side to the skin; thus specialized for expression
The document summarizes the musculature of the head and neck in several paragraphs. It describes two main groups of muscles: craniofacial muscles like the orbicularis oculi that control facial expression, and masticatory muscles like the masseter and temporalis that control jaw movement. It then provides details on individual muscle origins, insertions, innervation and actions.
The document summarizes the musculature of the head and neck in several paragraphs. It describes two main groups of muscles: craniofacial muscles like the orbicularis oculi that control facial expression, and masticatory muscles like the masseter and temporalis that control jaw movement. It then provides details on individual muscle origins, insertions, innervation and actions.
The document summarizes the muscles around the mouth. It begins with an introduction to the orbicularis oris muscle, which acts as a sphincter, and the 10 paired muscles that converge around the mouth to act as dilators. Each of the 10 muscles is then described in its own section, including origin, insertion, innervation, and action. The document concludes with brief sections on clinical considerations and bibliography.
Anatomy(2) The skull and face The temporal region Infratemporal and pterygopa...Hamzeh AlBattikhi
This document provides an overview of the anatomy of the scalp, face, and temporal region. It describes the layers of the scalp including the skin, connective tissue, aponeurosis, and pericranium. It details the muscles of the scalp including the occipitofrontalis. It discusses the sensory and vascular supply as well as lymph drainage of the scalp. It then describes the bones, muscles, nerves, vessels, and lymph drainage of the face. Finally, it briefly mentions that the temporal region is located on the side of the head and contains the temporal lobe of the brain.
Muscles of the Head and Neck: Facial Expression, Neck, Soft Palate, PharynxHeatherSeghi
The document describes the various muscle groups of the head and neck. It discusses the muscles of facial expression, which are innervated by the facial nerve and work in groups to enable facial expressions. It also outlines the muscles of the neck, soft palate, and pharynx. The muscles of the soft palate and pharynx help raise the soft palate and control swallowing during the three stages of deglutition: oral, pharyngeal, and esophageal.
The document discusses the anatomy and embryology of the facial nerve. It begins with an introduction stating that the facial nerve is the seventh cranial nerve and is mixed with both motor and sensory components. It then covers the embryological development of the facial nerve from the second branchial arch. The document outlines the course of the facial nerve from its nuclei of origin in the brainstem through its intracranial, intratemporal, and extracranial segments. It details the branches and functional components of the facial nerve as well as associated ganglia. Variations and blood supply of the facial nerve are also mentioned.
The document discusses the basic anatomy of the face. It describes the skin of the face as loose connective tissue with sweat and sebaceous glands. It notes the muscles of facial expression originate on skull bones and insert into the skin or mucous membrane to modify facial expressions. These include the orbicularis oculi and orbicularis oris muscles around the eyes and lips. The document also outlines the arterial blood supply to the face from the facial and superficial temporal arteries and venous drainage from the face.
This document provides an overview of the muscles of facial expression. It begins by explaining that facial expressions are produced by motions of facial muscles and convey emotional states. It then classifies the facial muscles into six groups: scalp muscles, ear muscles, eyelid muscles, nose muscles, mouth muscles, and neck muscles. For each muscle, it describes the origin, insertion, innervation, blood supply, and function. The document provides a detailed anatomical description of selected important facial muscles.
The oral cavity is divided into the oral cavity proper and the vestibule. The oral cavity proper contains the tongue and is bounded by the hard palate and dental arches. The vestibule is the space between the teeth and lips. Other structures include the lips, cheeks, gingiva, palate, and tongue. The tongue contains intrinsic and extrinsic muscles and is innervated by the hypoglossal nerve. The hard palate forms the roof of the mouth while the soft palate hangs from its posterior end and separates the nasal and oral cavities.
The document discusses the muscles of facial expression and mastication. It provides details on the origin, insertion, function and nerve supply of the main facial muscles including the orbicularis oculi, corrugator supercili, and zygomaticus major. It also discusses the muscles of mastication - masseter, temporalis, lateral pterygoid, and medial pterygoid - and their roles in elevating and moving the mandible for chewing. The document emphasizes the importance of understanding facial muscle anatomy for areas like prosthodontics and in treating patients with facial paralysis.
This document provides an overview of the orofacial musculature. It begins with brief introductions to the muscles of the scalp, auricle, eye, nose and around the mouth. It then discusses the muscles of mastication and tongue in more detail. The key muscles described include the occipitofrontalis and temporoparietalis muscles of the scalp, the auricularis anterior, superior and posterior muscles of the auricle, the extraocular muscles that move the eyeball and levator palpebrae superioris that moves the eyelid, and the orbicularis oris that acts as a sphincter around the mouth. Applied aspects and conclusions are also mentioned.
This document discusses the muscles of facial expression. It begins with an introduction on the embryological development and classification of these muscles. It then describes each muscle in detail, including origin, insertion, innervation, artery, and action. The major muscles described include the orbicularis oculi and orbicularis oris, which close the eyelids and purse the lips, as well as the buccinator and platysma, which assist with facial movements and expressions. The document concludes with references used.
The facial muscles are divided into 3 groups - muscles of the upper face, midface, and lower face. The upper face muscles include the orbicularis oculi, corrugator supercilii, frontalis, and procerus. The midface muscles include the nasalis, levator labii superioris alaeque nasi, levator labii superioris, zygomaticus minor, zygomaticus major, and levator anguli oris. The lower face muscles are the buccinator, orbicularis oris, depressor labii inferioris, depressor anguli oris, and mentalis. Contraction of these muscles produces facial expressions and wrinkles that can develop with
The facial muscles are responsible for facial expressions and are more complex in humans than other animals. They originate from mesoderm and are supplied by the facial nerve. The facial muscles can be categorized based on their location around the eyes, nose, lips, and mouth. The main functions of these muscles include facial expression and maintaining openings of the eyes, nose, and mouth.
Face is the most prominent part of the body
Facial muscles also known as the ‘mimetic muscles’, represent remnants of the ‘Panniculus Carnosus’ ,continuous subcutaneous muscle sheet seen in some animals.
Facial Musculature are the only somatic muscles in the body attached on one side to the bone and the other side to the skin; thus specialized for expression
Face is the most prominent part of the body
Facial muscles also known as the ‘mimetic muscles’, represent remnants of the ‘Panniculus Carnosus’ ,continuous subcutaneous muscle sheet seen in some animals.
Facial Musculature are the only somatic muscles in the body attached on one side to the bone and the other side to the skin; thus specialized for expression
The document summarizes the musculature of the head and neck in several paragraphs. It describes two main groups of muscles: craniofacial muscles like the orbicularis oculi that control facial expression, and masticatory muscles like the masseter and temporalis that control jaw movement. It then provides details on individual muscle origins, insertions, innervation and actions.
The document summarizes the musculature of the head and neck in several paragraphs. It describes two main groups of muscles: craniofacial muscles like the orbicularis oculi that control facial expression, and masticatory muscles like the masseter and temporalis that control jaw movement. It then provides details on individual muscle origins, insertions, innervation and actions.
The document summarizes the muscles around the mouth. It begins with an introduction to the orbicularis oris muscle, which acts as a sphincter, and the 10 paired muscles that converge around the mouth to act as dilators. Each of the 10 muscles is then described in its own section, including origin, insertion, innervation, and action. The document concludes with brief sections on clinical considerations and bibliography.
Anatomy(2) The skull and face The temporal region Infratemporal and pterygopa...Hamzeh AlBattikhi
This document provides an overview of the anatomy of the scalp, face, and temporal region. It describes the layers of the scalp including the skin, connective tissue, aponeurosis, and pericranium. It details the muscles of the scalp including the occipitofrontalis. It discusses the sensory and vascular supply as well as lymph drainage of the scalp. It then describes the bones, muscles, nerves, vessels, and lymph drainage of the face. Finally, it briefly mentions that the temporal region is located on the side of the head and contains the temporal lobe of the brain.
Muscles of the Head and Neck: Facial Expression, Neck, Soft Palate, PharynxHeatherSeghi
The document describes the various muscle groups of the head and neck. It discusses the muscles of facial expression, which are innervated by the facial nerve and work in groups to enable facial expressions. It also outlines the muscles of the neck, soft palate, and pharynx. The muscles of the soft palate and pharynx help raise the soft palate and control swallowing during the three stages of deglutition: oral, pharyngeal, and esophageal.
The document discusses the anatomy and embryology of the facial nerve. It begins with an introduction stating that the facial nerve is the seventh cranial nerve and is mixed with both motor and sensory components. It then covers the embryological development of the facial nerve from the second branchial arch. The document outlines the course of the facial nerve from its nuclei of origin in the brainstem through its intracranial, intratemporal, and extracranial segments. It details the branches and functional components of the facial nerve as well as associated ganglia. Variations and blood supply of the facial nerve are also mentioned.
The document discusses the basic anatomy of the face. It describes the skin of the face as loose connective tissue with sweat and sebaceous glands. It notes the muscles of facial expression originate on skull bones and insert into the skin or mucous membrane to modify facial expressions. These include the orbicularis oculi and orbicularis oris muscles around the eyes and lips. The document also outlines the arterial blood supply to the face from the facial and superficial temporal arteries and venous drainage from the face.
This document provides an overview of the muscles of facial expression. It begins by explaining that facial expressions are produced by motions of facial muscles and convey emotional states. It then classifies the facial muscles into six groups: scalp muscles, ear muscles, eyelid muscles, nose muscles, mouth muscles, and neck muscles. For each muscle, it describes the origin, insertion, innervation, blood supply, and function. The document provides a detailed anatomical description of selected important facial muscles.
The oral cavity is divided into the oral cavity proper and the vestibule. The oral cavity proper contains the tongue and is bounded by the hard palate and dental arches. The vestibule is the space between the teeth and lips. Other structures include the lips, cheeks, gingiva, palate, and tongue. The tongue contains intrinsic and extrinsic muscles and is innervated by the hypoglossal nerve. The hard palate forms the roof of the mouth while the soft palate hangs from its posterior end and separates the nasal and oral cavities.
The document discusses the muscles of facial expression and mastication. It provides details on the origin, insertion, function and nerve supply of the main facial muscles including the orbicularis oculi, corrugator supercili, and zygomaticus major. It also discusses the muscles of mastication - masseter, temporalis, lateral pterygoid, and medial pterygoid - and their roles in elevating and moving the mandible for chewing. The document emphasizes the importance of understanding facial muscle anatomy for areas like prosthodontics and in treating patients with facial paralysis.
Integrating Ayurveda into Parkinson’s Management: A Holistic ApproachAyurveda ForAll
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Local Advanced Lung Cancer: Artificial Intelligence, Synergetics, Complex Sys...Oleg Kshivets
Overall life span (LS) was 1671.7±1721.6 days and cumulative 5YS reached 62.4%, 10 years – 50.4%, 20 years – 44.6%. 94 LCP lived more than 5 years without cancer (LS=2958.6±1723.6 days), 22 – more than 10 years (LS=5571±1841.8 days). 67 LCP died because of LC (LS=471.9±344 days). AT significantly improved 5YS (68% vs. 53.7%) (P=0.028 by log-rank test). Cox modeling displayed that 5YS of LCP significantly depended on: N0-N12, T3-4, blood cell circuit, cell ratio factors (ratio between cancer cells-CC and blood cells subpopulations), LC cell dynamics, recalcification time, heparin tolerance, prothrombin index, protein, AT, procedure type (P=0.000-0.031). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and N0-12 (rank=1), thrombocytes/CC (rank=2), segmented neutrophils/CC (3), eosinophils/CC (4), erythrocytes/CC (5), healthy cells/CC (6), lymphocytes/CC (7), stick neutrophils/CC (8), leucocytes/CC (9), monocytes/CC (10). Correct prediction of 5YS was 100% by neural networks computing (error=0.000; area under ROC curve=1.0).
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Muktapishti is a traditional Ayurvedic preparation made from Shoditha Mukta (Purified Pearl), is believed to help regulate thyroid function and reduce symptoms of hyperthyroidism due to its cooling and balancing properties. Clinical evidence on its efficacy remains limited, necessitating further research to validate its therapeutic benefits.
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share - Lions, tigers, AI and health misinformation, oh my!.pptxTina Purnat
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Face. head and neck anatomy pdf
1. Face
The face is the anterior part of the head, situated between the ears, extending from
the chin to the hairline
Skin of the Face:
1. Contains numerous sweat and sebaceous glands.
2. Varies in thickness, being very thin on the eyelids.
3. Muscles underlying the skin are attached to the dermis.
4. Senile facial wrinkles are perpendicular to the line of muscle pull (horizontal
wrinkles on the brow, 'crow's foot' wrinkles at the lateral canthus, vertical
wrinkles on both lips).
5. No deep fascia is present on the face.
➔ Deep fascia is a dense connective tissue that is commonly
arranged in sheets that form a stocking around the muscles and
tendons beneath the superficial fascia ,
➔ The main function of the deep fascia is to support and protect
muscles and other soft tissue structures. It also provides a barrier
against the spread of infection from the skin and superficial fascia
into muscle compartments.
➔ The absence of a deep fascia in the face allows for greater mobility
and flexibility of the facial muscles, facilitating a wide range of
expressions. Additionally, the lack of a deep fascia contributes to the
relatively thin and pliable nature of facial skin.The face lacks a deep
fascia, which is a dense, fibrous connective tissue layer that is present
in many other regions of the body. In the face, the muscles
responsible for facial expression are organized differently compared
to muscles in other parts of the body. The muscles of facial
expression, such as the orbicularis oris, orbicularis oculi, and other
facial muscles, are more closely associated with the skin and are not
separated from it by a distinct deep fascia.
➔ The absence of a deep fascia in the face allows for greater mobility
and flexibility of the facial muscles, facilitating a wide range of
expressions. Additionally, the lack of a deep fascia contributes to the
relatively thin and pliable nature of facial skin.
➔ While the face doesn't have a deep fascia, it does have a superficial
fascia that connects the skin to the underlying muscles. This
superficial fascia contains fat and other connective tissue elements.
The unique structure of the facial muscles and the absence of a deep
2. fascia are adaptations that allow for the intricate and nuanced
movements involved in facial expression
Muscles of the Face:
1. Muscles of facial expression develop from the mesoderm of the second
pharyngeal arch.
2. They migrate widely to their adult positions and are supplied by the seventh
cranial (facial) nerve.
3. Functionally, they form groups around the orifices (eyes, nose, mouth) to
control these openings.
4. Various expressions on the face are side effects of this muscular control.
Specific Muscles:
1. Levator Palpebrae Superioris:
a. Associated with the orbital muscles.
b. Part of the occipitofrontalis muscle, which is part of the scalp.
2. Occipitofrontalis:
a. Part of the scalp.
3. Orbicularis Oculi:
a. Palpebral Part: Confined to the eyelids.
i. Fibers arise from the medial palpebral ligament, arch across
both lids, and interdigitate laterally.
b. Lacrimal Part: Deeper fibers attached to the lacrimal sac and lacrimal
crest.
c. Orbital Part: Larger part, arises from the frontal bone, anterior lacrimal
crest, and frontal process of the maxilla. Fibers circumscribe the
orbital margin in concentric loops.
Muscles:
● These muscles play a role in the movement and control of the eyelids and
nostrils, contributing to facial expressions and functionality.
3. 1. Orbicularis Oculi:
Nerve Supply: Temporal and zygomatic branches of the facial nerve.
Action:
i. Palpebral Fibers: Gently close the eyelids without burying the
eyelashes.
ii. Orbital and Palpebral Parts: When contracting together,
forcefully close the eyelids, burying the eyelashes. In normal
closing, the lateral part of the upper lid comes down before the
medial part, aiding in spreading lacrimal secretion from the
gland side (lateral) towards the nose.
2. Opponent Muscles:
i. Levator Palpebrae Superioris opposes the upper palpebral
fibers of Orbicularis Oculi.
ii. Occipitofrontalis opposes the orbital part.
3. Muscles of the Nostrils:
Sphincter Muscle of the Nostril (Transverse Part of Nasalis -
Compressor Naris):
i. Forms an aponeurosis over the bridge of the nose with its
counterpart on the opposite side.
ii. Arises from the maxilla.
iii. Opponent Muscle:
1. Alar Part of Nasalis (Dilator Naris): Opposes the
transverse part, inserted into the lateral part of the
ala.(The dilator naris muscle (or alae nasi muscle) is a
part of the nasalis muscle. It has an anterior and a
4. posterior part. It has origins from the nasal notch of
the maxilla and the major alar cartilage, and a single
insertion near the margin of the nostril. It controls
nostril width, including changes during breathing.)
4. Other Contributing Muscles:
i. Levator Labii Superioris Alaeque Nasi: Involved in widening the
nostril.The levator labii superioris alaeque nasi (Latin:
musculus levator labii superioris alaeque nasi) is a muscle
of facial expression that widens the nostril and elevates the
upper lip, thus enabling the facial expression of snarling. It
is classified as the nasal facial muscle.
ii. Depressor Septi: Arises from the maxilla above the central
incisor, attached to the nasal septum.
● Nerve Supply: Buccal branches of the facial nerve.
5.
6.
7.
8. Muscles of the Lips and Cheeks:
1. Sphincter (Constrictor) Muscle of the Lips: Orbicularis Oris
a. Structure:
i. Consists of fibers proper to itself and fibers added from the
dilators.
ii. Divided into four quadrants (upper, lower, right, left), each with
a larger peripheral part and a smaller marginal part in the red
zone of the lips.
iii. Bulk formed by extrinsic fibers, mostly from the buccinator
muscle.
iv. Fibers converge toward the modiolus, forming a chiasma where
middle fibers decussate.
b. Incisivus Labii Superioris and Incisivus Labii Inferioris
They are located under the labial mucosa. They originate near the
incisive alveoli of each jaw, and end on the deep surface of the
orbicular muscle of the mouth, near the labial commissure. The
superior is always more easily separable than the lower.
What is the function of the incisivus labii superioris?
The incisivus labii superioris muscle, situated in the facial region,
serves primarily in retracting the upper and lower lips. 'Incisivus'
derives from the Latin 'incidere' meaning 'to cut through
i. Attached to the incisive fossa of the maxilla and mandible.
ii. Arch laterally, interlacing with fibers of the peripheral part of
orbicularis oris near the modiolus.
iii. Deepest fibers in the lips, attached to the mucous membrane.
c. Nerve Supply: Buccal and marginal mandibular branches of the facial
nerve.
d. Action:
i. Contraction causes narrowing of the mouth.
ii. Lips become pursed into the smallest possible circle, creating a
whistling expression.
2. These muscles play a crucial role in the movement and control of the lips,
contributing to facial expressions and functional activities such as speaking
and smiling.
10. Buccinator Muscle:
The buccinator is an oral muscle of facial expression. It is located between the
mandible and maxilla, deep to the other muscles of the face
1. . Attachments –
Originates from the maxilla and mandible. The fibres run in an
inferomedial direction, blending with the orbicularis oris muscle and the
skin of the lips.
2. Origin:
a. Bony origin from both jaws, horizontally on the maxilla and from the
oblique line of the mandible.
b. Arises between the tuberosity of the maxilla and the hamulus at the
base of the medial pterygoid plate of the sphenoid.
c. Arises from the pterygomaxillary ligament, where the tendon of tensor
palati hooks around the hamulus.
3. Pterygomandibular Raphe:
a. Extends from the tip of the hamulus to the mandible just above the
posterior end of the mylohyoid line.
b. Lingual nerve is in contact with the mandible along this raphe.
4. Insertion:
a. Converges on the modiolus, where its fibers of origin from the raphe
decussate.
b. Maxillary and mandibular fibers pass medially without decussation
into the upper and lower lips, respectively.
11. c. Pierced by the parotid duct.
5. Buccal Fat Pad:
a. Lies on the outer surface of buccinator and is prominent in infants,
contributing to chubby cheeks.
b. Small molar glands beneath the fat pad, with ducts piercing the
muscle to open on the mucous membrane of the cheek.
6. Nerve Supply:
a. Buccal branches of the facial nerve.
b. Buccal branch of the mandibular nerve supplies proprioceptive fibers.
7. Action:
a. Accessory muscle of mastication, assisting in the return of the bolus
from the cheek pouch to the molars.
b. Classified as a muscle of facial expression due to facial nerve supply.
c. Relaxed when the cheeks are puffed out and contracts during forcible
expulsion of air, as in blowing a trumpet.
12. Dilator Muscles of the Lips:
The dilator muscles consist of a series of small muscles that radiate out from
the lips
1. Function:
a. Contraction of these muscles dilates the lips.
b. The contraction may disturb a lower denture.
2. Nerve Supply:
a. Supplied by the marginal mandibular branch of the facial nerve.
3. Nerve Supply of Face Muscles:
4. Motor Supply:
a. The supply from the facial nerve to the muscles is primarily motor.
13. 5. Proprioceptive Input:
a. Proprioceptive impulses from the facial muscles are conveyed
centrally by the trigeminal nerve.
b. Cutaneous branches of the trigeminal nerve connect freely with
branches of the facial nerve.
6. Facial Nerve Pathway:
a. The facial nerve emerges from the base of the skull through the
stylomastoid foramen, near the origin of the posterior belly of
digastric.
b. Branches of the facial nerve include:
i. Posterior Auricular Nerve: Supplies auricularis posterior and
the occipital belly of occipitofrontalis.
ii. Muscular Branch: Supplies the posterior belly of digastric and
stylohyoid.
iii. Temporal and Cervical Divisions: Divide within the parotid gland
into temporofacial and cervicofacial divisions.
iv. Pes Anserinus: A plexiform arrangement of branches emerging
from the parotid gland.
c. The cervical branch passes downward and supplies platysma.
7. Marginal Mandibular Branch:
a. Frequently single, running forwards above, along, or below the lower
border of the mandible.
b. Crosses the inferior border of the mandible to reach the face just
beyond the anterior border of the masseter muscle.
c. Courses superficial to the facial artery and vein.
d. Vulnerable during incisions near the lower border of the mandible.
e. Does not communicate with a buccal branch, and damage causes
detectable paralysis of the depressors of the lower lip and mouth
angle.
8. Cervical Branch:
a. Passes downward from the lower border of the parotid gland.
b. Supplies platysma.
9. Note: The branching pattern of the facial nerve can vary between individuals
and even between the two sides of the face in the same person.
14. Sensory Nerve Supply of the Face:
The trigeminal nerve has three divisions (ophthalmic, maxillary, and mandibular),
each responsible for supplying specific regions of the face.
Ophthalmic Nerve:
1. Lacrimal Nerve:
a. Supplies a small area of skin over the lateral part of the upper lid.
2. Supraorbital Nerve:
a. Indents the bone into a notch or a foramen about a third of the way
lateral to the medial end of the upper margin of the orbit.
b. Passes up and breaks into several branches radiating out to supply
the forehead and scalp up to the vertex.
3. Supratrochlear Nerve:
a. Passes up on the medial side of the supraorbital nerve.
b. Supplies the middle of the forehead up to the hairline.
4. Infratrochlear Nerve:
a. Supplies skin on the medial part of the upper lid.
15. b. Passes above the medial palpebral ligament and descends along the
side of the external nose, supplying skin over the bridge of the nose.
c. Also supplies the conjunctiva of the upper lid.
5. External Nasal Nerve:
a. Supplies the middle of the external nose down to the tip.
b. Emerges between the nasal bone and the upper nasal cartilage.
6. Great Auricular Nerve:
Supplies the skin over the parotid gland and part of the auricle of the
ear.Fibers reach the C2 segment of the spinal cord.
Note:
● The sensory supply of facial skin is divided into three zones by the branches
of the trigeminal nerve, meeting at the lateral margins of the eyelids and the
angle of the mouth.
● The spatial representation of the face in the spinal nucleus of the trigeminal
nerve in the brainstem, particularly with regard to pain sensation, may follow
an 'onion skin' pattern.
16. Maxillary Nerve:
The maxillary nerve arises from the anterior convexity of trigeminal ganglion
between ophthalmic and mandibular divisions of the trigeminal nerve. It is a
medium-sized branch compared to the smaller ophthalmic nerve and the larger
mandibular nerve.
The maxillary nerve gives rise to three cutaneous branches:
1. Infraorbital Nerve:
a. Emerges through its foramen and lies between levator labii superioris
and the deeper-placed levator anguli oris.
b. Branches immediately into a tuft of smaller branches radiating away
from the foramen.
c. Supplies the lower eyelid (including conjunctiva), cheek, nose, upper
lip, and labial gum.
17. 2. Zygomaticofacial Nerve:
a. Emerges from a foramen on the outer surface of the zygomatic bone.
b. Branches supply the overlying skin.
3. Zygomaticotemporal Nerve:
a. Emerges in the temporal fossa through a foramen in the temporal
(posterior) surface of the zygomatic bone.
b. Supplies a small area of temporal skin.
Note:
● The infraorbital nerve is derived from the maxillary nerve.
● The zygomaticofacial and zygomaticotemporal nerves emerge from specific
foramina on the zygomatic bone.
● The course and branching of veins in the neck are also described, including
the retromandibular vein, facial vein, internal jugular vein, and external
jugular vein, as well as their connections and drainage pathways.
Deep Venous Anastomoses:
What is a venous anastomosis?
Arterio-venous anastomoses (AVAs) are direct connections between small
arteries and small veins
1. Medial Angle of the Eyelids:
a. Communication between the angular vein and the ophthalmic veins.
b. Ophthalmic veins drain directly into the cavernous sinus.
c. Important for blood flow in case of facial vein thrombosis, as blood
from the forehead can flow through the orbit to reach the cavernous
sinus.
18. d. Significance in the "danger area" of infection in the upper lip and
nearby cheek.
2. Deep Facial Vein:
a. Passes backward from the facial vein, running between the masseter
and buccinator muscles.
b. Connects to the pterygoid plexus.
c. The pterygoid plexus communicates with the cavernous sinus through
emissary veins passing through the foramen ovale and the foramen
lacerum.
d. The "danger area" of the face is located between the angular and deep
facial veins.
3. Lymph Drainage of the Face:
4. Submental Nodes:
a. Drains a small triangular area, including the chin and tip of the tongue.
5. Submandibular Nodes:
a. Drains a wedge of tissue above the submental nodes, extending
laterally to the facial vessels.
b. Encompasses the central forehead, frontal sinuses, anterior half of
the nose and maxillary sinuses, upper lip, lower part of the face,
tongue, and the floor of the mouth.
6. Preauricular (Parotid) Nodes:
a. Drains the forehead, temple, orbital contents, and cheek.
7. Deep Cervical Nodes:
a. Ultimately receives lymph from all areas of the face.
Note:
● The lymphatic drainage system is organized into three superficial groups
corresponding to specific areas of the face, with eventual convergence into
the deep cervical nodes.