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Anatomy and Physiology of the Vestibular System

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1.  The purpose of the vestibular system is to detect: Angular velocity of the head Linear acceleration of the head Orientation of the head with respect to gravity All of the above

2.  The _____________ is the gateway between the middle ear and the inner ear. Tympanic membrane Round Window Oval Window Cochlea

3.  The vestibule is filled with: Perilymph Endolymph CSF Blood

4.  All three semi-circular canals terminate on the: Saccule Utricle Cupula Cochlea

5.  The semi-circular canals detect what type of information? Angular head acceleration Angular head velocity Linear Head acceleration Relationship of the head to gravity

6.  The cupula is located in the ______________ and contains the sensory structures of the ________________. Cochlea; organs of hearing Ampula; otoliths Utricle; semi-circular canals Ampula; semi-circular canals

7.  It is the job of the ___________ to detect gravity. Membranous labyrinth Semi-circular canals Cupula Otoliths (Utricle and Saccule)

8.  _________ weigh down the hair cells of the macular to facilitate the detection of gravity. Carbonate crystals Perilymphatic fluid Kinocilia Ectoderm

9.  The vestibular nerve is also known as what Cranial Nerve? 5 7 8 9

10.  The function of the VOR (vestibular-ocular reflex) is to keep the: eyes stable when the head is moving head stable when the eyes are moving eyes stable when the head and eyes move together the head stable when nystagmus is present