Term
| name the functions of the vestibular system |
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Definition
| 1. balance, 2. monitor changes of position of the head, 3. coordinate eye movement with head movement, 4. coordinate limbs with head movement |
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Term
| the osseos portion that is the "bucket" of the vestibular system |
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Definition
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Term
| canals arranged in 3 pairs at right angles. |
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Definition
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Term
| the middle portion of the vestibular system |
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Definition
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Term
| the "snail shell" which is responsible for hearing |
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Definition
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Term
| the "water filled bag" within the "bucket"-filled with endolymph |
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Definition
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Term
| fluid within the semicircular canal |
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Definition
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Term
| fluid within the vestibule |
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Definition
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Term
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Definition
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Term
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Definition
| a receptor that projects off cells. stereocillia (short) and kinocilium (large) |
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Term
| describe the function of the hair cells |
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Definition
| detect changes in motion (rotory and linear) |
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Term
| how do the hair cause function |
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Definition
| the hair part is embedded in gel (otolithic membrane), when movement happens, gel moves and cause hairs to bend. this releases neurotransmitters to nerve fibers at the bases of cells. |
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Term
| the name of the gel that embedds the hairs |
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Definition
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Term
| the receptors that are embedded in the cupula in each ampulla of the semicircular ducts |
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Definition
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Term
| function of the cristae ampullares |
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Definition
| dynamic equilibrium, rotary movement (as head spins around) |
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Term
| receptors that are embedded in the otolithic membrane of each utricle and saccule |
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Definition
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Term
| the function of the maculae |
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Definition
| static equilibrium, linear acceleration |
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Term
| where do the primary fibers of the vestibular system synapse |
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Definition
| the vestibular nuclei, some go directly to the cerebellum |
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Term
| where do the secondary fibers go |
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Definition
| come from the vestibular nuclei, have efferent projections to the nervous system |
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Term
| what is the fuction of the rostral vestibular nuclei |
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Definition
| predominantly projects to the extraocular nuclei of CN 3, 4, 6. |
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Term
| what is the function of the caudal vestibular nuclei |
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Definition
| project toward the cerebellum |
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Term
| what is the function of the later vestibular nuclei |
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Definition
| project toward the spinal chord, regulate muscle tone/balance. |
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Term
| what is the function of the medial vestibular nuclei |
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Definition
| project toward the spinal chord, cervical musculature-positions neck in relation to change |
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Term
| what is the function of the lateral vestibulospinal tract |
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Definition
| 1. facillitate ipsilateral extensor muscle tone, 2. regulate muscle tone/balance |
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Term
| what is the function of the medial vestibulospinal tract |
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Definition
| go to the cervical muscles from the medial nuclei |
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Term
| what is the function of the extraocular nuclei |
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Definition
| (3, 4, 6)-keep eyes stationary as head moves, conjugate eye movements |
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Term
| function of the vomition center |
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Definition
| spining stimulates receptors that go to the up chuck center |
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Term
| what is the function of the vestibulospinal tract |
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Definition
| seconary: enter floculonodular lobe, primary: directly to cerebellum to the fastigial nucleus |
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Term
| What are the branches of the medial longitudinal fasciculus |
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Definition
| ascending branch, decending branch |
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Term
| the function of the ascending branch of the longitudinal fasciculus |
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Definition
| go rostrally, provide vestibular info to the eyes (3, 4, 6)-form vestibulomesencephalic tract |
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Term
| what is the function of the descending branch of the medial longitudinal fasciculus |
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Definition
| go to caudal spinal chord, regulate extensor tone, form mediovestibulospinal tract |
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Term
| posture signs of vestibular disease |
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Definition
| 1. asymmetric ataxia, 2. head tilt, 3. curved trunk, 4. tip, fall, roll over, 5. circling |
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Term
| eye signs of vestibular disease |
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Definition
| 1. nystagmus-involuntary ossilation of eyes |
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