[Olfactory rhythm in the electrical activity of the amygdaloid nucleus of the human brain].

Electrical activity of human amygdala was studied by implanted electrodes at epileptic clinic. Respiration-linked spindles of 20-30 cps, 30-50 microV, 1-3 s duration were registered in response to various odoriferous stimuli. Room air was less but effective to induce this activity. The spindles seemed to emerge at the end of inspiration or the beginning of expiration and in case of monorhinal breathing or sniffing occurred in the ipsilateral structure only. Frequency analysis (within 20-40 Hz range) showed that quasisinusoidal olfactory rhythm may be expanded into sinusoidal components but no specific odour-dependent peculiarities of the rhythm were observed.