<prompt> All of following are examples of proximal muscle weakness EXCEPT?Myasthenia gravisThyroid myopathyMyotonic dystrophyDuchennes muscular dystrophy  <response>: Myasthenia gravis Features Eye muscle weakness, Ptosis, Diplopia In contrast, all myopathies have a proximal weakness an exception being Myotonic dystrophy, which has a distal weakness. 