O'sullivan-Mcleod Syndrome

O' Sullivan McLeod syndrome is a benign lower motor neuron disorder and a rare variant of monomelic amyotrophy (MA; see this term), characterized by an initial unilateral weakness in the intrinsic hand muscles that eventually spreads to the opposite limb (with an asymmetrical distribution) and that has a very slow progression of muscular atrophy over a 20 year period.