A blow or injury to the peroneal nerve could result in a peroneal nerve contusion. The peroneal nerve branches off of the sciatic nerve and runs down the lower the lower leg to provide for the peroneal muscles. The peroneal nerve contusion is often a result of a blow during a sporting event.
Dugdale, D. (2011, September 26). Common peroneal nerve dysfunction. Retrieved December 27, 2012, from http://www.nlm.nih.gov/medlineplus/ency/article/000791.htm