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11 Cards in this Set
- Front
- Back
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what is the origin and termination of the vestibulospinal tract?
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-origin is med and lat vestibular nuclei
-insertion is medial ventral horn interneurons which contact postural antigravity muscles |
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what is the fn of the vestibulospinal tract?
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-stimulate antigravity extensors
-inhibit antagonistic flexors |
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what is the origin and termination of the reticulospinal tract?
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-origin is retic formation
-termination is postural antigravity extensors |
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what is the fn of the reticulospinal tract?
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-maintain posture
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what is the origin and termination of the rubrospinal tract?
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-origin is red nucleus
-termination is upper limb flexors |
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what is the fn of the rubrospinal tract?
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-modifying activity of newly acquired skills
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where does the rubrospinal tract cross?
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-right after it leaves the red nucleus
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what is the origin and termination of the corticospinal tract?
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-origin is CTX
-termination is alpha motor neurons in distal muscles |
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what is the function of the corticospinal tract?
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-control the prime movements of muscles with highly skilled tasks
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what do LMN lesions typically result in?
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-no sensory loss
-dec muscle tone -weakness of any muscle supplied by the LMN -flaccid paralysis (atrophy) -hyporeflexia -fibrillations |
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what do UMN lesions typically result in?
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-loss of voluntary control of mm involved
-inc muscle tone (spasticity) -knife/clasp rigidity -hypereflexia -babinsky sign |
