[The hemiplegic form of episodic hereditary adynamic]

This form of disturbance seen in 3 generations of one family was not hitherto described in literature. The disorder was observed in the proband (35 year old female), her father and her son. Special attention is drawn to the clinical differences of episodic hereditary adynamia and sporadic forms of hyperkaliemic paroxysmal myoplegia. The inheritance was characterized by a autosomn-dominant type. There was also homochronicity and homotypicity. The authors are in agreement with the concept of Hamstorp concerning the independence of this order.