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11 Cards in this Set

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