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Normalized power spectrum density function analysis on spike trains. II. Rhythms of unit activities in the
1Department of Physiology, Sun Yat-Sen University of Medical Sciences, Guangzhou, People's Republic of China.
The International Journal of Neuroscience
|November 1, 1989
Abstract:
The normalized power spectrum density function (NPSDF) was used to analyse unit activities in the somatosensory cortex of cats. Thirty-four units from 40 cats were recorded and analysed. Rhythmic activities of 2-5 Hz were found in every unit, the strength increasing with mean firing rate and peripheral stimulation while the frequency remained constant. The results suggested: NPSDF is a better method for studying rhythm of unit activities; 2-5 Hz exists in the unit activities of the somatosensory cortex; and peripheral input may have the action of "phase tuning" in addition to the action of time-locked driven firing.