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Surgical anatomy of ear, Facial nerve, Attidus, round + oval window -…
Surgical anatomy of ear
parts of ear
inner ear
Balance + Hearing
External ear
Protection
Middle ear CLEFT
Magnifying sound + protection from high sounds
External ear
Auricle (pinnae)
External auditory canal
Cartilage: covers outer lateral 1/3
Bone: covers inner medial 2/3
Anterior wall
contains fissure of Santorini
covered by skin and hair follicles
lined by stratified squamous epithelium
Furunculosis
Ends by tympanic membrane
Middle ear cleft
Middle ear
contains
3 Ossicles
2 Muscles
1 nerve
parts
relations
nerve supply
Eustachian tube
upper 1/3 (bony)
lower 2/3 (cartilagenous)
Mastoid air cells
Antrum
Tympanic membrane (ear drum)
layers
skin
fibrous layer (membrana tensa)
mucus
cone of light
Inner ear "Labyrinth"
parts
Functions
cochlea
Vestibular sys
Stimulus for angular movement
Stimulus for linear movement
Receptors
Facial nerve
2nd part
3rd part
1st part
Attidus
round + oval window
Def