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Upper motor neurone lesion
An upper motor neuron lesion is a lesion of the neural pathway above the anterior horn cell or motor nuclei of the cranial nerves. This is in contrast to a lower motor neurone lesion, which affects nerve fibres travelling from the anterior horn of the spinal cord to the relevant muscle(s). Additional recommended knowledge
Symptoms
Corticospinal/pyramidal tractThese are the neural tracts which descend in the spinal cord, in the lateral columns, carrying signals for voluntary movement of skeletal muscle. These nerve fibres usually originate in the cerebral cortex, then gather in the internal capsule before crossing over to the opposite side (decussation) in the medulla oblongata and proceeding down the spinal cord to meet lower motor neurones in the anterior horn. See also
References
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Upper_motor_neurone_lesion". A list of authors is available in Wikipedia. |