Medically reviewed by Brigid Dwyer, MD Clonus is an abnormal reflex response that produces involuntary, repetitive, and ...

Scientists say they have discovered a possible underlying cause of the neurological disorder, motor neurone disease (MND ... where the malfunction is in the upper part of the spinal cord.

Spasticity is involuntary overactivity of muscles that occurs following upper motor neuron damage to the brain or spinal cord. Upper limb spasticity is common after stroke and can cause deformity ...

James Smith was diagnosed with motor neurone disease in June 2021 ... arm has now slowly progressed into twitching in most of my upper body and now little to no strength in my arms and hands.