Distal Hereditary Motor Neuronopathy Type 2a, also known as neuronopathy, distal hereditary motor, type 2a, is related to neuronopathy, distal hereditary motor, autosomal dominant 2 and severe congenital nemaline myopathy. An important gene associated with Distal Hereditary Motor Neuronopathy Type 2a is HSPB8 (Heat Shock Protein Family B (Small) Member 8). Related phenotypes are distal lower limb muscle weakness and distal muscle weakness