What is biker's palsy? Does it refer to bicyclists or motorcyclists?

Biker's palsy occurs as a result of a firm grip on bicycle handlebars for hours to
days and longer. There are two nerves affected most often: ulnar and median. Both these
nerves pass through the wrist to the hand.

Prolonged pressure can cause numbness, tingling, and weakness. Nerve involvement of this
kind is called neuropathy.

A similar problem can occur in motorcylists as well as anyone handling high-power tools
that vibrate like a jackhammer.

Reference: 

Venu Akuthota, MD, et al. The Effect of Long-Distance Bicycling on Ulnar and Median
Nerves. In The American Journal of Sports Medicine. August 2005. Vol. 33. No. 8.
Pp. 1224-1230.

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