PNB 2XB3 - Vestibular and Motor System Questions and Answers |100% Pass
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Course
PNB 2XB3
Institution
PNB 2XB3
PNB 2XB3 - Vestibular and Motor
System Questions and Answers |100%
Pass
What are the three ways in which the head can rotate in? - Answer-Yaw: z axis
(saying no)
Pitch: y axis (saying yes)
Roll: x axis
What are the semicircular canals filled with? - Answer-endolymph
What is the vestibular l...
what is the advantage of having high spontaneous firing rate even in the absence of tilt
in the hair cells of the vestibular system? - Answer✔✔-tilting in the direction opposite
to the direction which causes maximal firing rate causes hyperpolarizing the cell
during a rotation, the inertia of the ... causes deflection of the capula - Answer✔✔-
endolymph
explain the adaptation that occurs during a rotation - Answer✔✔-the endolymph
catches up with the speed of rotation, and so the capula is no longer deflected
explain the off response when the rotation stops - Answer✔✔-the rotation stops, but
the endolymph keeps moving due to its inertia, deflecting the capula in the opposite
direction, causing the hair cells to hyperpolarize
it is where the cell bodies of the axons in the vestibular nerve in a ganglion are -
Answer✔✔-spiral ganglion
oculomotor nerve (type of nerve and function) - Answer✔✔-motor nerve - eye
movement, pupillary constriction and accommodation, muscle of upper eyelid
abducens nerve (type of nerve and function) - Answer✔✔-motor nerve - eye
movements (abduction or lateral movements)
vestibulocochlear (auditory ) nerve (type of nerve and function) - Answer✔✔-sensory
- hearing, sense of balance
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