Term
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Definition
Detect angular acceleration around 3 orthogonal axes by movement of endolymph through ampullae and cupula Innervated by CN VIII (vestibulocochlear N)
Oriented at 90 degrees to each other |
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Term
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Definition
comprised of the utricle and saccule
Contain maculae which detect linear acceleration and head tilt
Maculae consist of otolith crystals |
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Term
| Superior Vestibular Ganglion |
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Definition
Input from utricle, anterior saccule and anterior and lateral semicircular canals
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Term
| Inferior Vestibular Ganglion |
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Definition
| Input from the Posterior saccule and posterior semicircular canal |
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Term
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Definition
True Vertigo: spinning sensation of movement, not lightheadedness, faintness, nausea, or unsteadiness
Most suggestive of a vestibular disease |
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Term
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Definition
Benign paroxysmal poisitional vertigo (BPPV) is most common cause of true vertigo
Central causes: Encephalitis, cerebral stroke, tumors, drugs and toxins
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Term
| Reasons for Urgent Referal |
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Definition
-diplopia
-somatosensory changes
-weakness and/or incoordination
-dysarthria (slurred speech)
-impaired consciousness
-drop in systolic blood pressure or rise in heart rate when moving from supine to sit |
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Term
| Warning sign of Vertebrobasilar Ischemia |
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Definition
Occipital headache that does not go away
Diplopia |
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