SPLH 620 ALL 2027 TEST SET ANSWERS AND QUESTIONS SET A.pdf

SPLH 620 ALL 2027 TEST SET ANSWERS AND
QUESTIONS SET A+
✔✔hair cells found in the _____________ respond to endolymph flow. - ✔✔cupula

✔✔ampulla - ✔✔

✔✔otolith organs - ✔✔utricle & saccule
-detect linear acceleration

✔✔utricle - ✔✔sensitive to linear acceleration on: horizontal plane

✔✔saccule - ✔✔sensitive to linear acceleration on: vertical plane

✔✔macula - ✔✔a patch of hair cells and supporting cells
-bottom of utricle
-walls of saccule

✔✔vestibular pathway - ✔✔-vestibular sense organs
-vestibular ganglion
-vestibular nuclei (superior, medial, lateral, inferior)
*THEN*
-cerebellum (ascending)
-thalamus/cerebral cortex (ascending)
-oculomotor, trochlear, abducens nuclei (ascending)
-spinal cord/motor nuclei of extraocular muscles (descending)

✔✔vestibular pathway - ✔✔

✔✔2 descending pathways - ✔✔#1
-lateral vestibular nucleus
-to "LVST"
-to spinal cord

, #2
-medial vestibular nucleus
- to "MVST"
-to spinal cord

✔✔lateral vestibular nucleus pathway... - ✔✔-descending ---> along LVST to the spinal
cord
-ipsilateral
-posture/walk upright

✔✔medial vestibular nucleus pathway... - ✔✔-descending ---> along MVST to the spinal
cord
-bilateral
-head movement/ integrate head & eye movements

✔✔3 ascending pathways - ✔✔#1
-superior & medial vestibular nuclei
-to "MLF"
-to nuclei of extraocular muscles

#2
-medial & inferior vestibular nuclei
- to "ICP"
-cerebellum

#3
-superior vestibular nucleus
-to "VPL"
-cortex

✔✔superior & medial vestibular nuclei pathway... - ✔✔-ascending ---> along MLF to
extraocular muscles (oculomotor, trochlear, abducens)
-coordinate eye movements w/ head movement

✔✔medial & inferior vestibular nuclei pathway... - ✔✔-ascending ---> along ICP to the
cerebellum
-coordinates posture

✔✔superior vestibular nucleus pathway... - ✔✔-ascending ---> along VPL to thalamus &
cerebral cortex
-associated with conscious perception

✔✔vestibular pathway types - ✔✔