the ear (anatomy of the neck)
TRANSCRIPT
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THE EAR(Page 154)
Dr.Sherif Fahmy
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A- External EarDr.Sherif Fahmy
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Dr.Sherif Fahmy
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Auricle
Lobule
External auditory meatus
Ear drum
Dr.Sherif Fahmy
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Auricle
Lobule of ear
External auditory meatus
Ear drum
Dr.Sherif Fahmy
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Tympanic memebrane (Ear drum)
Dr.Sherif Fahmy
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Tympanic membrane
External auditory meatus
Malleus
Middle ear
Dr.Sherif Fahmy
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Pars tensa
Pars flaccida
Cone of light
Handle of malleus
Dr.Sherif Fahmy
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Tympanic membrane
Malleus
Middle ear
Umbo
Handle of malleus
Dr.Sherif Fahmy
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Blood & Nerve Supply of Tympanic Membrane
• 1- Nerve Supply:• A- Outer surface: is supplied by auriculo-
temporal and auricular branch of vagus.• B- Inner surface: tympanic plexus.• 2- Blood Supply:• 1- Outer surface: deep auricular artery.• 2- Inner surface: from anterior tympanic
artery. Dr.Sherif Fahmy
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Dr.Sherif Fahmy
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Outer aspect of tymoanic membrane
Handle of malleus
Cone of light Dr.Sherif Fahmy
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Otitis media
Dr.Sherif Fahmy
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B- Middle Ear(Page 156)
Dr.Sherif Fahmy
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Epitympanic recess
Tympanic cavity
Parts of middle ear cavity
Dr.Sherif Fahmy
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Roof
Floor
Anterior wall
Posterior wall
Medial wallWalls of middle ear
Dr.Sherif Fahmy
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Tegmen tympani
Dr.Sherif Fahmy
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Roof
Tegman tympani
Floor
Int. jugular vein
Tympanic br. Of Glosso-pharyngeal n.
Roof & Floor
Dr.Sherif Fahmy
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Anterior wall
Posterior wall
Promontory
Tympanic plexus
Oval window
Round window
Br. From sympathetic plexus around I.C.A.
Tympanic br. Of 9th CN
Canal for facial N.
Medial wall
Dr.Sherif Fahmy
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Roof
Floor
Anterior wall
Posterior wall
Tensor tympani m.
Auditory tube
Internal carotid art.
Sympathetic plexus
Anterior wall
Dr.Sherif Fahmy
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Aditus ad antrum
Pyramid
Facial canal
Chorda tympani
Posterior wall
Dr.Sherif Fahmy
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External auditory meatus
Ear drum
Lateral wall
Dr.Sherif Fahmy
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Contents of middle ear1- Ossicles: Malleus, incus and stapes.2- Muscles: Tensor tympani & Stapedius.3- Nerves: Tympanic plexus and chorda tympani.4- Blood vessels: Tympanic arteries.
Dr.Sherif Fahmy
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Malleus
Middle ear
Incus
Stapes
Ossicles
Dr.Sherif Fahmy
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MalleusIncus
Stapes
Ossicles Head
Handle
Body
Long process
HeadNeck
Limbs
Foot plate
Short process
Anterior process
Dr.Sherif Fahmy
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Pharyngo-tympanic tube
Dr.Sherif Fahmy
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Middle ear
Lateral wall of naso-pharynx
Pharyngo-tympanic tube
Dr.Sherif Fahmy
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Dr.Sherif Fahmy
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Opening of pharyngeotympanic tube
Dr.Sherif Fahmy
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Inner Ear(Page 160)
Dr.Sherif Fahmy
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Internal acoustic meatus
Dr.Sherif Fahmy
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Petrous Semicircular canals
Vestibule
Cochlea
Bony labyrinith
Dr.Sherif Fahmy
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saccule
UtricleCochlear duct
Semicircular ducts
Endolymphatic duct
Membranous labrynith
Dr.Sherif Fahmy
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Vestibulo-cochlear Nerve
(Page 160)Dr.Sherif Fahmy
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Vestibular nerve
Cochlear nerve
Internal auditory meatus
Vestibulo-cochlear nerve
Dr.Sherif Fahmy
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Vestibular ganglia
Vestibular nerve
Spiral ganglia
Cochlear nerve
Vestibulo-cochlear nerve
Internal auditory meatus
Ponto-cerebellar angle
Dr.Sherif Fahmy
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Transmission of sound
Tympanic membrane
Malleus
Incus
Stapes
Oval window
Round window closed with 2dry tympanic membrane
Dr.Sherif Fahmy
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Spiral gangliom
Dr.Sherif Fahmy
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Applied Anatomy1- Otitis media.2- Intracranial injury of facial n.
-At internal auditory meatus.-At medial wall of middle ear.
3- High tone deafness.Dr.Sherif Fahmy