Myasthenia gravis and other neuromuscular junction disorders.

Correspondence to: Dr Saiju Jacob, Department of Neurology, Queen Elizabeth Neurosciences Centre, University Hospitals of Birmingham, B15 2TH, UK; [email protected] Myasthenia gravis is the most common autoimmune disease affecting the neuromuscular junction and is characterised by painless fatigable muscle weakness. It is caused by autoantibodies against neuromuscular junction proteins, either the nicotinic acetylcholine receptor (AChR) or the muscle specific tyrosine kinase (MuSK). Mutations in neuromuscular junction proteins cause congenital myasthenic syndromes. Other antibody mediated conditions affecting the neuromuscular junction include Lambert Eaton myasthenic syndrome and neuromyotonia.