Vestibular System Test
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| A. brief episodes of vertigo coinciding with changes in body postition; triggered by bending over, ect.B. rotational/angular accelerationC. The Maculae are 2 patches of hair cells and supporting cells located in the walls of the utricle and saccule (one maculae is in each)D. restiform body. Primary vestibulocerebellar fibers are sent by the vestibular ganglion; secondary vestibulocerebellar fibers are sent by vestibular nuclei.E. restiform bodyF. pitchG. Cell hyperpolarization and decreased rate of firing.H. Increased density of cupula causes abnormal cupula deflections when head changes position relative to gravity.I. vertical and perpendicular to each otherJ. Hair cells of maculae and cristae ampullares.K. Meniere's Disease is probably caused by an imbalance between production and reabsorption of endolymph --> excessive amt of endolymph and distention of membranous labyrinth (endolymph hydrops)L. the macula (otolith organ)M. bending of stereocilia, some cells are depolarized and some are hyperpolarized (polarity of all cells is not the same in all areas of the macula)N. kinociliumO. Hairs of the Crista Ampullaris are covered by a gelatinous mass (cupula), which extends across ampulla as a partitionP. The bending of the stereocilia causes changes in the flow of ions across cell membrane.Q. functional pairR. recurrent episodes of vertigo accompanied by hearing loss, tinnitis (ringing in the ears), nystagmus, nausea, and vomiting.S. ... particular plane. Because ducts are arranged in roughly orthogonal planes, movements in any direction can be detected.T. Posterior semicircular duct abnormalities seem to be implicated |
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Lisa1585