[Regional clinico-genetic features of myotonias].

The incidence of myotonia in the South-West regions of Uzbekistan is 1.6:100000 of the population. Its proportion among other hereditary diseases of the nervous system is 8.2% and among neuromuscular abnormalities--2.6%. Furthermore, it has been also established that an autosomal-recessive form of non-atrophic myotonia is rather prevalent in this region. It has a number of clinical characteristics which differentiate it from a generalized recessive form prevalent in West Europe.