Normalized power spectrum density function analysis on spike trains. II. Rhythms of unit activities in the somatosensory cortex of cats.
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.
Tsau
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Y
Department of Physiology, Sun Yat-Sen University of Medical Sciences, Guangzhou, People's Republic of China.
Chen
P X
PX
D000818:Animals; D002415:Cats; D009474:Neurons / Q000502:physiology*; D013003:Somatosensory Cortex / Q000502:physiology*