Diagnosis and classification of the neuromuscular disorders. The muscular dystrophies. The congenital myopathies. Metabolic myopathies I: glycogenoses. Metabolic myopathies II: lipid disorders, mitochondrial disorders. Metabolic myopathies III: ion channel disorders. Endocrine myopathies. Disorders of the lower motor neurone: the spinal muscular atrophies. Disorders of the lower motor neurone: hereditary motor neuropathies. Myasthenia. Inflammatory myopathies. The floppy infant syndrome. Disorders with muscle contracture and joint rigidity. Disorders of movement. Genetics.