Term
| What is he primary organ of equilibrium? |
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Definition
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Term
| Vestibular input to areas of the nervous system involved in motor control elicits... |
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Definition
| adjustments of muscle activity and body position to allow for upright posture. |
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Term
| Vestibular input to regions of the nervous system controlling eye movements helps to... |
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Definition
| stabilize the eyes in space during head movements. this reduces the movement of the image of a fixed object on the retina whether the target or the head is in motion |
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Term
| The balance system relies on what three systems? |
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Definition
| the peripheral vestibular system, visual system, proprioceptive system |
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Term
| What do the oculomotor and vestibulo-ocular reflex give us the ability to do? |
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Definition
| track a moving object or track an object if we are moving. |
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Term
| When the head moves to the right, the eyes compensate by... |
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Definition
| drifting to the left to keep the object is view. |
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Term
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Definition
| the sense of the relative position of neighboring parts of the body; the sense that indicates whether the body is moving with required effort, as well as where the various parts of the body are located in relation to each other |
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Term
| The role of the vestibular system is to signal the the CNS these two things: |
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Definition
| 1) changes in head movement, 2) changes in the body's orientation relative to gravity, i.e. acceleration and deceleration of the head |
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Term
| The balance system along with the _____ _____ makes sure that we make the movements we want and allows for quick corrections. |
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Definition
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Term
| What is the role of the semicircular canals? |
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Definition
| To be responsive to rotational or angular movements of the head. |
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Term
| Based on their orientation, each semicircular canal is sensitive to what? |
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Definition
| to movement in a particular plane of head movement either in an acceleration or deceleration mode. |
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Term
| The anterior (superior) plane of the semicircular canal is responsible for signaling what? |
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Definition
| head motion shoulder to shoulder. |
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Term
| The horizontal plane of the semicircular canal is responsible for signaling what? |
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Definition
| head motion from side to side. |
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Term
| The Posterior plane of the semicircular canal is responsible for signaling what? |
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Definition
| head movement tilting front from back |
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Term
| How are the semicircular canals affected with head movement in a particular direction? |
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Definition
| The stereocilia within the ampulla of each semicircular canal is either stimulated or inhibited, thus signaling to the CNS how the hair is turning in space. |
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Term
| While, rotating our head to the right which which horizontal canal will be stimulated? |
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Definition
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Term
| What is the function of the saccule? |
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Definition
| To signal linear motion of the head, specifically movements up and down (e.g. going up and down in an elevator) |
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Term
| What is the role of the utricle? |
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Definition
| to signal linear motion of the head, specifically movement backward and forward and side to side. |
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