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What is the difference between corticobulbar tract and cortico spinal tract?
Wiki User
∙ 13y ago
corticospinal tracts are the tracts of the upper motor neurons which originate in the cortex,(precentral gyrus). They terminate in the spinal cord by synapsing with the lower motor neurons either directly or through an interneuron.
lesion to the corticospinal tract results in
Spastic paralysis on the opp side if the lesion is above pyramidal decussation or before crossing over.
Positive Babinski's sign
loss of fine coordination in the distal limbs such as piano playing or typing
Wiki User
∙ 13y ago
Wiki User
∙ 13y agocorticobular contains the tract to the cranial motor nucleus, while corticospinal to the spinal motor nucleus.
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Where does crossing over occur?
* Most of the cortico-spinal fibers (about 90%) cross over to the contralateral side in the http://www.answers.com/topic/medulla-oblongata (http://www.answers.com/topic/decussation-of-the-pyramids). Those that cross in the medulla oblongata travel in the http://www.answers.com/topic/lateral-corticospinal-tract. * The remainder of them (10%) cross over at the level that they exit the http://www.answers.com/topic/spinal-cord, and these travel in the http://www.answers.com/topic/anterior-corticospinal-tract. Most of the cortico-spinal fibers (about 90%) cross over to the contralateral side in the medulla oblongata (pyramidal decussation). Those that cross in the medulla oblongata travel in the lateral corticospinal tract. The remainder of them (10%) cross over at the level that they exit the spinal cord, and these travel in the anterior corticospinal tract.
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