Normal muscle function and structure. Muscular dystrophy: Duchenne, Becker/limb girdle; congenital; facioscapulohumeral. Congenital myopathies: central core disease, minicore disease; nemaline; myotubular - type 1; myotubular - X-linked; mitochondrial; fibre type disproportion; ocular. Spinal muscular atrophy: Werdnig-Hoffman, intermediate, mild; peripheral neuropathies; peroneal muscular atrophy; motor neurone disease; myotonia congenita. Myotonic dystrophy: congenital, later form, adult. Metabolic myopathies: glycogenoses; lipid storage. Myasthenia gravis: congenital, later; dermatomyotosis. Floppy infant: general Praeder-Willi syndrome; laxity of ligaments; central causes; other disorders. Contractures of muscle: arthrogryposis; rigid spine syndrome; myotosis ossificans. Biopsy technique: open needle.
