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corticospinal tract
(redirected from Pyramidal signs)

   Also found in: Medical, Wikipedia 0.01 sec.
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Noun1.corticospinal tract - any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral root of the spinal cordcorticospinal tract - any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral root of the spinal cord
efferent, efferent nerve, motor nerve - a nerve that conveys impulses toward or to muscles or glands
central nervous system, CNS, systema nervosum centrale - the portion of the vertebrate nervous system consisting of the brain and spinal cord
basal ganglion - any of several masses of subcortical grey matter at the base of each cerebral hemisphere that seem to be involved in the regulation of voluntary movement


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Pyramidal signs were described in four patients, ranging from hyperreflexia with bilateral Babinski signs in patients 9 and 11 to spastic paraparesis (patient 6) or tetraparesis (patient 10).
Affected individuals have variable combinations of cerebellar ataxia, progressive external opthalmoplegia (paralysis of eye muscle), pyramidal signs, dystonia (impairment of muscle tone) and amyotrophy (muscle wasting).
 
 
 
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