Vestibular System

7. spontaneous, horizontal / rotatory, conjugate nystagmus are all signs of ________ vestibular disease
10. loss of voluntary motor coordination
11. hair cells are located in the _____________ of the semicircular canals
12. 3 semicircular canals = ________ labyrinth
13. Hair cells are tonically ______ at resting state
14. main function of vestibular system is to maintain _________
16. vestibular hair cells have a _________ firing rate when not stimulated
17. gelatinous mass that covers hair cells in semicircular canals
18. involuntary movement of the eyes
19. which part of vestibular system involves: membranous labyrinth; vestibular portion of CN VIII
21. which part of vestibular system involves: 4 pairs of vestibular nuclei on each side of brainstem; cerebellum (fastigial nucleus and flocculondular lobe

1. angular acceleration of the head displaced the ________ causing excitation of inhibition
2. tilt medical term head twist
3. when the head is tilted, ________ forces act on the otolith mass, moving it across the vestibular cells
4. horizontal acceleration
5. semicircular canals detect _________ acceleration
6. 2 otolith organs = _________ labyrinth
8. a lesion on one side of the body will cause the normal side to ______ the body toward the abnormal side
9. vertical acceleration
14. a lesion will cause a lack of facilitation of _________ muscle on the affected side
15. hair cells are located in the _______ of the otoliths
20. the fast phase of jerk nystagmus is ________ the side of the lesion