the ear (anatomy of the neck)
TRANSCRIPT
THE EAR(Page 154)
Dr.Sherif Fahmy
A- External EarDr.Sherif Fahmy
Dr.Sherif Fahmy
Auricle
Lobule
External auditory meatus
Ear drum
Dr.Sherif Fahmy
Auricle
Lobule of ear
External auditory meatus
Ear drum
Dr.Sherif Fahmy
Tympanic memebrane (Ear drum)
Dr.Sherif Fahmy
Tympanic membrane
External auditory meatus
Malleus
Middle ear
Dr.Sherif Fahmy
Pars tensa
Pars flaccida
Cone of light
Handle of malleus
Dr.Sherif Fahmy
Tympanic membrane
Malleus
Middle ear
Umbo
Handle of malleus
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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
Dr.Sherif Fahmy
Outer aspect of tymoanic membrane
Handle of malleus
Cone of light Dr.Sherif Fahmy
Otitis media
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B- Middle Ear(Page 156)
Dr.Sherif Fahmy
Epitympanic recess
Tympanic cavity
Parts of middle ear cavity
Dr.Sherif Fahmy
Roof
Floor
Anterior wall
Posterior wall
Medial wallWalls of middle ear
Dr.Sherif Fahmy
Tegmen tympani
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Roof
Tegman tympani
Floor
Int. jugular vein
Tympanic br. Of Glosso-pharyngeal n.
Roof & Floor
Dr.Sherif Fahmy
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
Roof
Floor
Anterior wall
Posterior wall
Tensor tympani m.
Auditory tube
Internal carotid art.
Sympathetic plexus
Anterior wall
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Aditus ad antrum
Pyramid
Facial canal
Chorda tympani
Posterior wall
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External auditory meatus
Ear drum
Lateral wall
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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
Malleus
Middle ear
Incus
Stapes
Ossicles
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MalleusIncus
Stapes
Ossicles Head
Handle
Body
Long process
HeadNeck
Limbs
Foot plate
Short process
Anterior process
Dr.Sherif Fahmy
Pharyngo-tympanic tube
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Middle ear
Lateral wall of naso-pharynx
Pharyngo-tympanic tube
Dr.Sherif Fahmy
Dr.Sherif Fahmy
Opening of pharyngeotympanic tube
Dr.Sherif Fahmy
Inner Ear(Page 160)
Dr.Sherif Fahmy
Internal acoustic meatus
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Petrous Semicircular canals
Vestibule
Cochlea
Bony labyrinith
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saccule
UtricleCochlear duct
Semicircular ducts
Endolymphatic duct
Membranous labrynith
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Vestibulo-cochlear Nerve
(Page 160)Dr.Sherif Fahmy
Vestibular nerve
Cochlear nerve
Internal auditory meatus
Vestibulo-cochlear nerve
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Vestibular ganglia
Vestibular nerve
Spiral ganglia
Cochlear nerve
Vestibulo-cochlear nerve
Internal auditory meatus
Ponto-cerebellar angle
Dr.Sherif Fahmy
Transmission of sound
Tympanic membrane
Malleus
Incus
Stapes
Oval window
Round window closed with 2dry tympanic membrane
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Spiral gangliom
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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