Cogwheeling is a type of rigidity seen in people with Parkinson’s disease. It’s often an early symptom of Parkinson’s, and it may be used to make a diagnosis. Cogwheeling, also known as cogwheel ...

A 64-year-old woman complains of loss of balance and urinary retention in the past few months. Your examination reveals an akinetic-rigid state. The patient has masked facies, cogwheel rigidity, brisk ...