Dech Flashcards
(26 cards)
Front
Back
Which part of the temporal bone is elongated and projects at the base?
Styloid
Which nerve supplies the lateral surface of tympanic membrane causing cough reflex?
Arnold’s Nerve
Which nerve supplies roof and anterior wall of external auditory canal?
Auriculotemporal nerve
Effective vibrating area of tympanic membrane?
45 mm²
Cone of light from 3 to 6 o’clock indicates which side?
Right
Perforation involving all pars tensa quadrants but annulus intact?
Subtotal perforation
Length of external auditory canal and its parts?
24mm; 1/3 cartilaginous, 2/3 bony
Communication between parotid gland and auditory canal?
Fissure of Santorini
Narrowest portion of external auditory canal?
Isthmus
Absent layer in pars flaccida?
Fibrous layer
Part of middle ear known as attic?
Epitympanum
Landmark for 1st geniculate ganglion of facial nerve?
Cochleariform process
Boundary between superficial and deep mastoid cells?
Korner’s septum
Landmark for endolymphatic duct?
Donaldson’s line
Most common site for residual cholesteatoma?
Sinus tympani
Nerve supplying tensor tympani?
Cranial nerve V
When does intrauterine hearing start?
20 weeks
Organ of Corti location and function?
Scala media; hearing
Function of external and middle ear?
Amplification of sound
Cochlear part for high-frequency sound?
Basal turn
Final perception of sound occurs in?
Brodmann area 42
Eye movement in hypoactive labyrinth lesion?
Towards hypoactive side
Semicircular canal stimulated in caloric test?
Lateral semicircular canal
