[Ultradian rhythm in EMG and EEG of a child with cerebral palsy (author's transl)].

EMG as well as EEG of a two years old girl with cerebral palsy was recorded continuously during four days and nights. Mathematical analysis (autocorrelations and spectra of variance) revealed an ultradian periodicity (1.5--2.5 hours) of all recorded functions. Especially, a 1.5-hour period was seen in records of EMG (m. triceps surae) during days. These findings are discussed with respect to Kleitman's basic rest activity cycle. The ultradian rhythm of motor activity in children with cerebral palsy should be taken into account, especially with respect to timing and programs of physical therapy.