What sort of disorder is friedreich ataxia?

Friedreich's Ataxia: Friedreich's ataxia is a rare inherited disease that causes nervous system damage and movement problems. It usually begins in childhood and leads to impaired muscle coordination (ataxia) that worsens over time. The spinal cord and peripheral nerves degenerate, becoming thinner. The cerebellum, part of the brain that coordinates balance and movement, also degenerates to a lesser extent.

Friedrich's ataxia: FA is an inherited disorder that affects strength and coordination, among other things, and often interferes with walking. http://www.curefa.org/whatis.html