Discharge pattern of the sympathetic vertebral nerve activity in kittens in postnatal ontogenesis.
Electrical activity of the sympathetic vertebral nerve (VN) was studied in kittens (0-180 days) using frequency domain analyzes. Rhythmical discharges in the studied nerve were observed from the moment of birth and correlated with cardiac (1.2-3 Hz) and respiratory frequency (0.15-0.7 Hz). Amplitude of discharges was minimal in newborn kittens and increased during ontogenesis. Relative spectral power was maximal at cardiac and respiratory frequencies in animals in all age groups. '10-Hz discharges' (8-12 Hz band) in the VN oscillations appeared only in animals older than 20 days of life. In accordance to their sympathetic nerve discharge, kittens become mature at 2 month of their life.
Masliukov
Petr M
PM
Department of Normal Physiology and Biophysics, Yaroslavl State Medical Academy, Revoliucionnaya 5, Yaroslavl 150000, Russia. mpm@yma.ac.ru
D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D002415:Cats; D004594:Electrophysiology; D013131:Spine / Q000254:growth & development / Q000294:innervation*; D013564:Sympathetic Nervous System / Q000254:growth & development / Q000502:physiology*