<prompt> Antibodies against acetylcholine receptors are seen in September 2009Lambe-Eaton-myasthenic syndromeHypehyroidismBotulismMyasthenia gravis  <response>: Ans. D: Myasthenia gravis Myasthenia gravis MG is a relatively rare autoimmune disorder of peripheral nerves in which antibodies form against acetylcholine ACh nicotinic postsynaptic receptors at the myoneural junction. A reduction in the number of ACh receptors results in a characteristic pattern of progressively reduced muscle strength with repeated use of the muscle and recovery of muscle strength following a period of rest. The bulbar muscles are affected most commonly and most severely, but most patients also develop some degree of fluctuating generalized weakness. 