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Board Review Series - Fix J.D.

Fix J.D. Board Review Series - London, 1995. - 430 p.
Download (direct link): boardreviewseries1995.djvu
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the vibration louder
in the normal ear.
B. Rinne test
-compares air and bone conduction.
-is performed by placing a vibrating tuning fork on the mastoid process
until it is no longer heard; then it is held in front of the ear. -normal
subject hears vibration in the air after bone conduction is gone, -patient
with unilateral conduction deafness fails to hear vibrations in
the air after bone conduction is gone, -patient with unilateral partial
nerve deafness hears vibration in the air
after bone conduction is gon e.
C. Schwabach test
—compares bone conduction of a patient with that of a person with norm al
hearing, -shows bone conduction to be better than normal in cases of
conduction
deafness, —shows bone conduction to be less than normal in cases of nerve
deafness.



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Chapter 11 Auditory System I 183
VII. Brainstem Auditory Evoked Responses (BAERs)
-is a new noninvasive method used to evaluate the integrity of the auditory
pathways.
-clicks are delivered to the ear and recorded via scalp electrodes, -seven
waves (I-VII) correspond to auditory nerve, cochlear nuclei, superior
olivary nucleus, lateral lemniscus, inferior colliculus, medial geniculate
body, and auditory radiations, -is used to assess hearing in young children,
to diagnose brainstem lesions
(multiple sclerosis) and acoustic neuromas of the posterior fossa.



--------------------------------------- 95

Review Test
Directions: Each of the numbered items or incomplete statements in this section is nega-
tively phrased, as indicated by a capitalized word such as NOT, LEAST, or EXCEPT. Select
the ONE lettered answer or completion that is BEST in each case.
1. All of the following statements concerning 5. All of the following statements concerning
conduction deafness are correct EXCEPT the tympanic cavity are correct EXCEPT
(A) the sound of a vibrating tuning fork (A) it contains the chorda tympani
placed on the vertex is heard best in the (B) it contains parasympathetic input to the
deaf ear submandibular and sublingual glands
(B) it may be the result of an acoustic neu (C) it contains two striated muscles
roma (D) it communicates with the nasopharynx
(C) it may be the result of otosclerosis (E) it receives sensory innervation by the
(D) it may be the result of otitis media vagal nerve
(E) it may be the result of wax in the exter
nal auditory meatus 6. All of the following statements concerning
the organ of Corti are correct EXCEPT
2. All of the following statements concerning
nerve deafness are correct EXCEPT (A) it receives input from the brainstem
(B) it is innervated by bipolar neurons of the
(A) in patients with partial nerve deafness, spiral ganglion
air conduction is better than bone con (C) it contains mechanoreceptors
duction (D) it contains inner and outer hair cells
Previous << 1 .. 71 72 73 74 75 76 < 77 > 78 79 80 81 82 83 .. 351 >> Next