upper motor neuron lesion(redirected from supranuclear lesion)
up·per mo·tor neu·ron le·sion
injury to the descending motor pathways cephalad to the brainstem or spinal motor nuclei.
Synonym(s): supranuclear lesion
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upper motor neuron lesion
Neurological damage to the corticospinal or pyramidal tract in the brain or spinal cord. This lesion results in hemiplegia, paraplegia, or quadriplegia, depending on its location and extent. Clinical signs include loss of voluntary movement, spasticity, sensory loss, and pathological reflexes.
See also: lesion
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