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
Farlex Partner Medical Dictionary © Farlex 2012

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
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Neurological examination revealed intact Bell's phenomenon indicating supranuclear lesion in DEP.
The cell body (soma) is in the cerebral cortex and its axon extends to the spinal cord (SC) and all the injuries in this section of the pathway are called supranuclear lesions, while the injuries of soma of the lower motor neuron are nuclear lesions [2].
The involvement of both upper and lower parts of the face distinguishes lower motor neurone paralysis from supranuclear lesions.[1] The classic test is to ask the patient to attempt to wrinkle the forehead.