Middle Ear Cavity
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The middle ear cavity is approximately 15mm vertically and anteroposteriorly. It contains the ear ossicles (malleus, incus, stapes), ligaments, nerves like the chorda tympani and nerve to stapedius, blood vessels, and muscles like the tensor tympani and stapedius. Infections of the middle ear cavity can spread to the cranium, pharynx through the auditory tube, or cause rupture of the tympanic membrane and spread to the mastoid antrum.
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Middle ear
The middle ear is an air-filled cavity located between the outer ear and inner ear. It contains three small bones called the malleus, incus, and stapes that transmit sound vibrations from the tympanic membrane to the inner ear. The middle ear is divided into three sections and has boundaries formed by thin bones that separate it from surrounding structures like the cranial cavity, jugular bulb, and internal carotid artery. It communicates anteriorly with the nasopharynx and posteriorly with the mastoid air cells. The middle ear is supplied by arteries, drained by veins, and innervated by nerves that include the facial and glossopharyngeal nerves.
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This document provides an in-depth overview of the anatomy of the middle ear, including its structures and blood supply. Key points covered include:
- The middle ear contains the eustachian tube, tympanic cavity, aditus, and mastoid air cells. The tympanic cavity houses the ossicles and contains walls, floors and openings like the oval and round windows.
- Structures inside the tympanic cavity include the malleus, incus, and stapes ossicles, the tensor tympani and stapedius muscles, nerves like the chorda tympani, and blood vessels.
- The mastoid air cells are interconnected air spaces behind the middle ear that
Middle ear
The middle ear is located in the petrous portion of the temporal bone. It contains the three auditory ossicles (malleus, incus, stapes), two small muscles (tensor tympani and stapedius), nerves, and air. It connects the external ear canal to the inner ear and contains important structures like the Eustachian tube. The middle ear transmits sound vibrations from the tympanic membrane to the inner ear through the ossicles while also containing muscles that help dampen vibrations.
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The ppt is about anatomy of middle ear which has the following sub headings:
1.Ossicles of ear
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3.Nerve supply
4.Lining of middle ear
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The document describes the anatomy and structures of the human ear. It is divided into three main parts:
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Middle ear
The middle ear is an air-filled cavity located between the outer ear and inner ear. It contains three small bones called the malleus, incus, and stapes that transmit sound vibrations from the tympanic membrane to the inner ear. The middle ear is divided into three sections and has boundaries formed by thin bones that separate it from surrounding structures like the cranial cavity, jugular bulb, and internal carotid artery. It communicates anteriorly with the nasopharynx and posteriorly with the mastoid air cells. The middle ear is supplied by arteries, drained by veins, and innervated by nerves that include the facial and glossopharyngeal nerves.
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The middle ear is located in the petrous portion of the temporal bone. It contains the three auditory ossicles (malleus, incus, stapes), two small muscles (tensor tympani and stapedius), nerves, and air. It connects the external ear canal to the inner ear and contains important structures like the Eustachian tube. The middle ear transmits sound vibrations from the tympanic membrane to the inner ear through the ossicles while also containing muscles that help dampen vibrations.
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The ppt is about anatomy of middle ear which has the following sub headings:
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The middle ear consists of the tympanic cavity, Eustachian tube, and mastoid air cell system. The tympanic cavity contains the ossicles and is bounded by walls that form compartments. It communicates with the nasopharynx via the Eustachian tube and with the mastoid antrum. The mastoid antrum leads to extensive air cells within the temporal bone. Structures like the facial nerve canal pass through the walls and roof of the middle ear.
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This document discusses the nose, nasal cavity, and paranasal sinuses. It begins by outlining the boundaries and features of the nasal cavity, including its roof, floor, and lateral walls. It then describes the nasal septum in detail, including its bony, cartilaginous, and vascular components. Finally, it briefly introduces the paranasal sinuses, noting their locations, characteristics, and functions in humidifying and warming inhaled air.
lecture ear.pptx
The document provides an overview of the anatomy of the ear, including the external, middle, and inner ear structures. The external ear includes the pinna, external auditory canal, and tympanic membrane. The middle ear contains the three ossicles (malleus, incus, stapes), muscles, nerves and vessels. The inner ear consists of the bony labyrinth containing the cochlea, vestibule and semicircular canals, as well as the membranous labyrinth and organ of Corti which is responsible for hearing.
Nose and paranasal sinuses extra shortened
Nose and paranasal sinuses extra shortened
Dr. lama khaled El Banna
Faculty of Oral and Dental Medicine
Al – Azhar University
'ANATOMY OF THE MIDDLE EAR' with you.pdf
The middle ear is an air-filled cavity within the temporal bone. It functions to transmit vibrations from the tympanic membrane to the inner ear via the three ossicles: malleus, incus, and stapes. The middle ear is divided into three parts and bounded by thin bone walls that separate it from surrounding structures like the carotid artery and mastoid air cells. It contains the ossicles, two muscles, nerves, blood vessels, and connects anteriorly to the nasopharynx and posteriorly to the mastoid antrum.
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anatomy of external ear ^0 middle ear.pptx
The external ear consists of the auricle, external acoustic canal, and tympanic membrane. The auricle develops from the fusion of tubercles in the first and second branchial arches. The external acoustic canal has outer cartilaginous and inner bony portions. The tympanic membrane separates the external and middle ears. The middle ear consists of the tympanic cavity, eustachian tube, and mastoid air cells. The tympanic cavity contains the epitympanum, mesotympanum, hypotympanum, and protympanum. Important anatomical structures include the ossicles, facial nerve, chorda tympani, and openings for the oval and
Anatomy of ms
The maxillary sinuses are the largest paired paranasal sinuses located within the maxilla. They are pyramid-shaped with their base pointing to the lateral nasal wall and apex extending laterally towards the zygomatic process. The maxillary sinuses have a capacity of 15 ml and relations anteriorly to the facial surface of the maxilla, posteriorly to the infratemporal and pterygopalatine fossae, and medially to the middle and inferior nasal meatuses. The floor is formed by the alveolar and palatine processes while the roof is the orbital floor. Blood supply is from the facial, infraorbital, and greater palatine arteries, with lymphatic drainage to
Anatomy of Middle Ear.pptx
The middle ear is located in the petrous part of the temporal bone. It is an air-filled cavity lined by mucous membrane that contains the three ossicles (malleus, incus, and stapes), two small muscles (tensor tympani and stapedius), nerves, and arteries. The tympanic membrane separates the middle ear from the external ear canal. Key structures in the middle ear walls include the facial nerve canal in the posterior wall and the oval and round windows in the medial wall. The ossicles transmit sound vibrations from the tympanic membrane to the oval window.
Vascular Supply of Head and Neck
The document summarizes the arterial supply of the head and neck region. It describes the common carotid artery and its bifurcation into the internal and external carotid arteries. It then discusses the branches of the external carotid artery in detail, including the maxillary, superficial temporal, occipital, lingual, facial, ascending pharyngeal arteries. It outlines the course and branches of each artery as well as their anatomical relationships and clinical significance.
Anatomy and physiology of nose and paranasal sinuses
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Middle Ear Cavity
- 2. DIMENSIONS • VERTICAL 15mm • ANTERO-POSTERIOR 15mm • Upper 6mm • Middle 2mm • Lower 4mm
- 4. BOUNDARIES • Anterior Carotid • Posterior Mastoid • Roof Tegmen typani • Floor Jugular • Lateral Tymanic • Medial Labrynthine
- 8. CONTENTS EAR OSSICLES. LIGAMENTS. NERVES – Chorda tympani, Nerve to stapedius, Nerve to tensor tympani. BLOOD VESSELS supplying MEC. MUSCLES – Tensor tympani, Stapedius.
- 10. MALLEUS
- 11. INCUS
- 12. STAPES
- 13. BLOOD SUPPLY • Tympanic br – maxillary artery • Stylomastoid br. – post. Auricular .a. • Petrosal br. – middle meningeal .a. • Sup.tympanic br. ,, • Tympanic br – ascending pharyngeal.a. • Tympanic br. – Artery of pterygoid canal • Tympanic br. - ICA
- 14. NERVE SUPPLY • TYMPANIC PLEXUS – Formed by glossopharyngeal nerve and superior & inferior caroticotympanic br. Of sympathetic plexus around ICA.
- 15. LYMPHATICS • PAROTID • DEEP CERVICAL LYMPH NODES.
- 16. APPLIED ANATOMY INFECTIONS may spread on to cranium, through auditory tube into pharynx, rupture of tympanic membrane, pus collection spread onto mastoid antrum, Compression of facial nerve due to severe bone diseases.
- 17. OTITIS MEDIA