Term
| Function of the vestibular system detects and maintains ________. |
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Definition
| Function of the vestibular system detects and maintains _equilibrium_. |
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Term
| A function of the vestibular system is to provide input to the CNS concerning ____________________. |
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Definition
| A function of the vestibular system is to provide input to the CNS concerning _head movement and body position_. |
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Term
| The CNS uses signals concerning head movement and body position to generate _________________________. |
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Definition
| The CNS uses signals concerning head movement and body position to generate _eye movements and postural responses_. |
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Term
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Definition
| Movement sensors contained in the saccule and utricle. |
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Term
| Name the reflex when the head moves in one direction while the eyes move in the opposite direction to maintain visual gaze on an object. |
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Definition
| The reflex when the head moves in one direction while the eyes move in the opposite direction to maintain visual gaze on an object is the Vestibulo-Ocular Reflex. |
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Term
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Definition
| Benign Paroxysmal Positional Vertigo |
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Term
| What is the pathology of Benign Paroxysmal Positional Vertigo? |
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Definition
| The pathology of Benign Paroxysmal Positional Vertigo is when otoliths in the utricle have broken free and moved into the semicircular canals. |
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Term
| Benign Paroxysmal Positional Vertigo can be brought on by _______________. |
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Definition
| Benign Paroxysmal Positional Vertigo can be brought on by _blows to the head or C-spine flexion/extension injury_. |
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Term
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Definition
| VOR stand for _Vestibulo-Ocular Reflex_. |
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Term
| What is the purpose of VOR? |
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Definition
| The purpose of VOR is to maintain stable vision during head movement; eye-head coordination. |
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Term
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Definition
| SCC stands for _Semicircular canals_. |
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Term
| Describe the Push-Pull Mechanism. |
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Definition
| The Push-Pull Mechanism is the SCC working in pairs. When the head turns right, the right SCC increases the firing rate, and the left SCC decreases the firing rate. The CNS recognizes the difference and then stabilizes the gaze and posture. |
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Term
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Definition
| UVL stands for _Unilateral Vestibular Lesion_. |
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Term
| What is the most common peripheral vestibular pathology? |
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Definition
| The most common peripheral vestibular pathology is _Benign Paroxysmal Positional Vertigo_. |
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Term
| Benign Paroxysmal Positional Vertigo is a common _________________. |
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Definition
| Benign Paroxysmal Positional Vertigo is a common _peripheral vestibular pathology_. |
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Term
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Definition
| BVL stands for _Bilateral Vestibular Lesion_. |
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Term
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Definition
| UVL stands for _Unilateral Vestibular Lesion_. |
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Term
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Definition
| CVL stand for _Central Vestibular Lesion_. |
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Term
| Vertical nystagmus is a symptom of ____________. |
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Definition
| Vertical nystagmus is a symptom of a _Central Vestibular Lesion (CVL)_. |
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Term
| What vestibular system dysfunction might you suspect if your patient complains of an unstable gaze during head movement? |
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Definition
| If my patient complains of an unstable gaze during head movement I would suspect a _Bilateral Vestibular Lesion (BVL)_. |
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Term
| What is the common cause of BVL? |
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Definition
| BVL is commonly caused by antibiotics that damage the vestibulo-ocular reflex. |
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Term
| If your patient c/o severe vertigo or a slipping sensation when moving the head, you might suspect BVL because __________. |
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Definition
| If your patient c/o severe vertigo or a slipping sensation when moving the head, you might suspect BVL because _there is no VOR to stabilize eye position during head movements_. |
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