All of the following are associated with proximal muscle weakness except- (AIIMS Nov 2012)
|B||Duchenis muscular dystrophy|
o The general rule in that :
• Myopathies have proximal muscle weakness.
• Neuropathies have distal muscle weakness
o Myotonic dystrophy is an exception to this general rule and mainly involves the distal muscles.
o The difference between myopathy and muscular dystrophy.
• Any skeletal muscle disorder that causes structural changes or functional impairment of muscle. It also includes muscular dystrophies.
• The muscular dystrophy means abnormal growth of muscle.
• It is characterized by -
i) It is a primary myopathy iii) Course is progressive
ii) It has genetic basis iv) Degeneration & Death of muscle fibers occur at some stage of the disease
o So, muscular dystrophy is a type of myopathy.