The left bony labyrinth(Lateral aspect)
The left bony labyrinth (Interior Aspect)
The membranous labyrinth (blue) projected
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on to the bony labyrinth
The fundus of the left internal acoustic
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meatusSaccular and Utricular maculae
A section of an ampul ary crest
Organ of Corti
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A simplified view of the innervation of theorgan of Corti
The principal activities of the peripheral
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auditory apparatus
Deafness(Conducting and Sensorineural)
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Blood Supply and Venous Drainage
? Labyrinthine Artery
? Stylomastoid branch of Posterior auricular/Occipital Artery
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Venous Drainage? Superior petrosal or
? Transverse Sinus
Vestibulocochlear Nerve
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MCQsQuestion:- Which of the following is the correct representation of
organ of Corti?
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a. Zona arcuatab. Cuticular plate
c. Zona pectinata
d. Phalangeal process
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Question:- Which of the following is the correct regarding the
excitation of different regions of the cochlea by different sound
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frequencies from its base to apex?a. Highest to lowest frequency
b. Lowest to highest frequency
c. Any frequency at any part
d. Middle, lowest and highest
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