Corticospinal tract fiber origins Flashcards

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1
Q

Where do Corticospinal tract fibers originate in brain?

A

60% a come from primary motor cortex, premotor areas, and supplementary motor areas. The remainder originates from primary sensory areas, the parietal cortex, and the operculum, so could have a positive Babinski sign (indicating upper motor neuron lesion) in pt with lesion at primary somatosensory cortex of parietal lobe.

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