The axial skeleton includes the bones of the skull, vertebral column, ribs, and sternum. The skull has 22 bones that form the cranium and face. The cranium contains the brain and sense organs and is formed by the occipital, parietal, frontal, temporal, sphenoid, and ethmoid bones. These bones have markings that indicate muscle attachments and openings for blood vessels and cranial nerves. The face contains 14 bones, including the paired maxillae, palatine, nasal, zygomatic, lacrimal, and conchae bones, as well as the single vomer and mandible bones.
Bones of Skull (Human Anatomy)
by DR RAI M. AMMAR
www.facebook.com/drraiammar
www.twitter.com/drraiammar
www.instagram.com/drraiammar
www.linkedin.com/in/drraiammar
www.themedicall.com/blog/auther/drraiammar/
For Any Book or Notes Visit Our Website:
www.allmedicaldata.wordpress.com
www.drraiammar.blogspot.com
YOUTUBE CHANNEL :
https://www.youtube.com/channel/UCu-oR9V3OdFNTJW5yqXWXxA
ANY QUESTION ??
Get in touch with us at Any of the Above Social Media or Email at
drraiammar@gmail.com
allmedicaldata@gmail.com
Bones of Skull (Human Anatomy)
by DR RAI M. AMMAR
www.facebook.com/drraiammar
www.twitter.com/drraiammar
www.instagram.com/drraiammar
www.linkedin.com/in/drraiammar
www.themedicall.com/blog/auther/drraiammar/
For Any Book or Notes Visit Our Website:
www.allmedicaldata.wordpress.com
www.drraiammar.blogspot.com
YOUTUBE CHANNEL :
https://www.youtube.com/channel/UCu-oR9V3OdFNTJW5yqXWXxA
ANY QUESTION ??
Get in touch with us at Any of the Above Social Media or Email at
drraiammar@gmail.com
allmedicaldata@gmail.com
QUICK guide to Skeletal System- Dr Gurjant Singh (PT)Dr. Gurjant Singh
So you have read well about human skeletal system and now just want to revise or go through it quickly? Here is the perfect one for you
Dont forget to like and follow for more presentations
Skeletal system. anatomy and physiology of skeletal system. appendicular skel...mamtabisht10
SKELETAL SYSTEM
bones, cartilage and ligaments are tightly joined to form a strong, flexible framework called skeletal system
anatomy and physiology of axial and appendicular skeletal system
Axial Skeleton: The axial skeleton includes the skull, spine, ribs and sternum.
Appendicular Skeleton:
The appendicular skeleton includes the appendages of the body, which are the shoulders, arms, hips, and legs.
QUICK guide to Skeletal System- Dr Gurjant Singh (PT)Dr. Gurjant Singh
So you have read well about human skeletal system and now just want to revise or go through it quickly? Here is the perfect one for you
Dont forget to like and follow for more presentations
Skeletal system. anatomy and physiology of skeletal system. appendicular skel...mamtabisht10
SKELETAL SYSTEM
bones, cartilage and ligaments are tightly joined to form a strong, flexible framework called skeletal system
anatomy and physiology of axial and appendicular skeletal system
Axial Skeleton: The axial skeleton includes the skull, spine, ribs and sternum.
Appendicular Skeleton:
The appendicular skeleton includes the appendages of the body, which are the shoulders, arms, hips, and legs.
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
Atrioventricular conduction blocks ( AV blocks ) are classified into 3 types.
This document describes the acute management of AV block.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
2. The Axial Skeleton
• Functions as a framework - supports and protects
organs in the dorsal and ventral body cavities
• Contains the special sense organs for taste, smell,
hearing, balance, and vision
• Attachment sites for muscles that
- adjust the posture of the head, neck, and trunk
- move the thoracic cage for respiration
- stabilize the appendicular skeleton
• Joints of the axial skeleton are very strong
- reinforced with ligaments and allow limited movement
• Contain red marrow for blood cell production
- portions of the vertebrae, sternum, and ribs
3.
4. The Cranium
• The skull contains 22 bones: 8 form the cranium or
‘braincase’ and 14 are associated with the face
• The cranium surrounds and protects the brains:
- occipital, 2 parietal, frontal, 2 temporal, sphenoid, ethmoid
- occipital, parietal, frontal bones form the calvaria ‘skullcap’
- encloses the cranial cavity a fluid-filled chamber
- BVs, nerves, and membranes attached to the inner surface
stabilize position of the brain
- outer surface provides an extensive area for attachment of
muscles that move the eyes, jaws, and head
9. Sutures
• Immovable joints at the boundaries between
skull bones
- bones firmly joined together with dense fibrous CT
• 5 major sutures: lamboid, sagittal, coronal,
squamous, and frontonasal
15. The Occipital Bone
• Contributes to the posterior, lateral, inferior cranium
• Foramen magnum connects the cranial cavity with the
spinal cavity enclosed by the vertebral column
• Bone markings:
- occipital condyles allows the skull to articulate with the first
cervical vertebra (the atlas)
- external occipital crest, external occipital protuberance,
inferior and superior nuchal lines (mark attachment of
muscles and ligments that stabilize articulation between the
atlas and the skull), jugular foramen (internal jugular vein),
hypoglossal canals (hypoglossal nerves control tongue muscle
• Internal grooves follow the path of BVs and the ridges
mark the attachment site of the meninges
20. The Parietal Bones
• Contribute to the superior and lateral surfaces of
the cranium and form the major part of the calvaria
• Bone markings:
- the superior and inferior temporal lines mark the
attachment of the temporalis muscle (closes the mouth)
- parietal eminence, the smooth surface superior to the
temporal lines
22. The Frontal Bone
• Forms the forehead and roof of the orbits
• The convex anterior surface is called the squamous
part, or forehead, ends at the supra-orbital margins
- thickened ridges or superciliary arches support the eyebrows
- supra-orbital foramen or notch
• Orbital part forms the roof of each orbit
- inferior surface or orbital surface contains openings for BVs
and nerves
- lacrimal fossa location of the lacrimal gland
• Interior surface bears the frontal crest that marks the
attachment of membranes to prevent tissue contact
23. Fig 6.7a
Frontal (metopic) suture – during development bones form
through fusion of separate centers of ossification, and at birth the
fusions are not complete
26. Temporal Bone
• Contribute to the cranial lateral and inferior walls
- contribute to the zygomatic arches
- form the only articulations with the mandible and articulate
with the zygomatic, parietal, occipital bones, and sphenoid
- protect the sense organs of the inner ear
- inferior convex surfaces form an extensive area for muscle
attachments that close the jaw and move the head
• Bone markings:
- zygomatic and temporal process form the zygomatic arch
- mandibular fossa and articular tubercle (mandible)
- tympanic part surrounds entrance to the external
acoustic meatus (external auditory canal) which ends at
the tympanic membrane (eardrum)
27. Temporal Bone Markings
• Petrous part surrounds and protects the sense
organs of hearing and balance
• Mastoid process - attachment site for muscles that
rotate or extend the head
- mastoid air cells (sinuses) within the mastoid process
- mastoid foramen near the base of the mastoid for BVs that
supply the membranes surrounding the brain
• Styloid process - attachment site for ligaments that
support the hyoid bone and muscles of the tongue,
pharynx, and larynx
- the facial nerve passes through the stylomastoid foramen
28. Temporal Bone Markings
• The carotid canal – passageway for the internal
carotid artery that supplies blood to the brain
• Foramen lacerum – contains hyaline cartilage and
small arteries
• Musculotubal canal surrounds the auditory (or
Eustachian or pharyngotympanic) tube
- begins at the pharynx and ends at the tympanic cavity or
middle ear (contains the auditory ossicles)
• Internal acoustic meatus carries BVs and nerves to
the inner ear and the facial nerve to the stylomastoid
foramen
32. The Sphenoid (Sphenoidal Bone)
• Articulates with every other cranial bone
- acts as a bridge uniting the cranial and facial bones
- articulates with the palatine, zygomatic, maxillae, and
vomer of the facial bone complex
- also acts as a brace strengthening the sides of the skull
• General shape compared to a bat or butterfly
- greater and lesser wings
- hypophysial fossa between the wings cradles the
pituitary gland below the brain and the bony enclosure is
called the sella turcica
33. The Sphenoidal Bone Markings
• Superior orbital fissure – passageway for BVs and
cranial nerves of the eye
• Optic groove – the transverse groove that crosses
the sella turcica above the seat level
- at either end is the optic canal, a passageway for the
optic nerves
• On either side of the sella turcica are the
rotundum, ovale, and the spinosum foramina
- carry BVs and cranial nerves to the orbit, face, and jaws
• Pterygoid processes form a pair of plates
- attachment sites for muscles that move the lower jaw and
soft palate
- pterygoid canal provides a route for a small nerve and an
artery that supply the soft palate and adjacent structures
36. The Ethmoid (Ethmoidal Bone)
• Irregular shaped bone that forms part of the orbital
wall, the anteromedial cranium floor, roof of the nasal
cavity, and part of the nasal septum
• Cribriform plate - perforated by cribriform foramina (openings
for the olfactory nerves)
- the falx cerebri (a membrane that stabilizes the position of the
brain) attaches to a prominent ridge called the crista galli
• Ethmoidal labyrinth an interconnected network of
ethmoidal air cells that open into the nasal cavity
- mucous secretions flush the surfaces of the nasal cavities
- superior and middle nasal conchae slows the airflow to warm,
humidify, and remove dust
- perpendicular plate forms part of the nasal septum
38. The Cranial Fossae
Cranial fossa – curving depression of the cranial floor
• Anterior cranial fossa formed by:
- the frontal bone, the ethmoid, the lesser wing of the sphenoid;
cradles the frontal lobes of the cerebral hemispheres
• Middle cranial fossa is formed by:
- the sphenoid, temporal, parietal bones; cradles the temporal
lobes of the cerebral hemispheres, the diencephalon, and
mesencephalon
• Posterior cranial fossa is formed primarily by:
- the occipital bone, with contributions from the temporal and
parietal bones
- suports the occipital lobes of the crebral hemispheres, the
crebellum, and the pons and medulla oblongata (brain stem)
41. Bones of the Face
• There are 14 facial bones
• Paired bones include the maxillae, palatine, nasal,
zygomatic, lacrimal, and inferior nasal conchae
• Single bones include the vomer and mandible
• Protect and support the entrances to the digestive
and respiratory tracts
• The superficial facial bones provide areas for
attachment of muscles, control facial expressions
and assist in food manipulation
42. The Maxillae
• The largest facial bones – form the upper jaw
- articulates with all facial bones except the mandible
• Orbital surface provides protection for the eye
• Frontal processes articulate with the frontal bone
of the cranium and with a nasal bone
• Alveolar margin or processes contain the upper
teeth
• The infra-orbital foramen passageway for a major
sensory facial nerve
- runs along the infra-orbital groove passes through the
inferior orbital fissure and the foramen rotundum to reach
the brain stem
43. The Maxillae
• Maxillary sinuses are the largest sinuses in the skull
- lighten the portion of the maxillae superior to the teeth
- produce mucous secretions that flush inferior surfaces of
the nasal cavities
• Palatine processes form most of the hard palate of
the mouth
- incisive fossa on the inferior midline marks the openings of
the incisive canals that contain small arteries and nerves
46. The Palatine Bones
• Small, L-shaped bones (horizontal and vertical)
• Horizontal plates articulate with the maxillae to form
the posterior portions of the hard palate
- a greater palatine groove lies between the palatine bone and
the maxilla on each side
- usually contains 1 or more lesser palatine foramina
- nasal crest, marks the articulation with the vomer
• Vertical portion of the ‘L’ is formed by the
perpendicular plate of the palatine bone
- articulates with the maxillae, sphenoid, ethmoid, inferior
nasal concha
- medial surface has 2 ridges: 1) the conchal crest, and 2) the
ethmoidal crest
- orbital process, forms a small portion of the orbital floor
54. The Nasal Complex
• Paranasal sinuses are the interconnected hollow
spaces inside the frontal, ethmoid, sphenoid,
and maxillary bones
• These spaces reduce the weight of the skull,
produce mucus, and allow air to resonate for
voice production
• These paranasal sinuses are called the frontal
sinus, maxillary sinus, sphenoidal sinus, and the
ethmoidal air cells