Age-Related Changes in Rhythmic Electrical Activity in the Cervical Sympathetic Trunk in Rats and Cats

摘要

Baseline electrical activity in the cervical sympathetic trunk was studied in neonatal rats and cats and atages 10, 20, and 30 days and two and six months, using spectral analysis. Rats from the neonatal period tothe end of the first month of life and cats to 20 days of life showed increases at the amplitudes of electricaloscillations. From birth, all animals showed oscillations in the respiratory and cardiac rhythms. From day20, frequencies with a cardiac component in rats dominated the power spectrum. The proportion of otherfrequencies, not associated with the cardiac or respiratory rhythms, was smaller. In cats, unlike the situa-tion in rats, there were no age-related changes in the spectral composition of baseline electrical activity.High-frequency oscillations were recorded in cats from birth.