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Posted on May 03, 2023
Clonus of the Brachioradialis Reflex as a Sign of Cervical Myelopathy
Posted on May 2, 2023 Neurology Blog Editor A 59-year-old man presented with progressive right arm weakness and gait instability. Neurologic examination revealed clonus of the right brachioradialis (Video 1). Clonus is elicited in the same manner as eliciting a muscle stretch reflex, and is a sign of hyperreflexia, suggesting an upper motor neuron lesion.