TY - JOUR
T1 - Slow fluctuations of single unit activities of hippocampal and thalamic neurons in cats. I. Relation to natural sleep and alert states
AU - Kodama, Tohru
AU - Mushiake, Hajime
AU - Shima, Keisetsu
AU - Nakahama, Hiroshi
AU - Yamamoto, Mitsuaki
PY - 1989/5/15
Y1 - 1989/5/15
N2 - Spontaneous unit discharges during the natural sleep-wakefulness cycle in two different neuronal groups, the hippocampal pyramidal cells and thalamic ventrobasal neurons, have been analyzed. The results show that both neurons fire with white-noise-like fluctuations during the slow-wave sleep, and with slow fluctuations with power spectral densities inversely proportional to the frequency in the frequency range of 0.02-1.0 Hz, during the paradoxical sleep. This confirms that the characteristics of fluctuations in neuronal activities of the mesencephalic reticular formation observed in our previous study are more general phenomena in the cat's brain. Partly similar behavior of spectral densities is also observed during the alert state. These observations are quantitatively confirmed by the statistical time series analysis of the spike density processes of spontaneous activities.
AB - Spontaneous unit discharges during the natural sleep-wakefulness cycle in two different neuronal groups, the hippocampal pyramidal cells and thalamic ventrobasal neurons, have been analyzed. The results show that both neurons fire with white-noise-like fluctuations during the slow-wave sleep, and with slow fluctuations with power spectral densities inversely proportional to the frequency in the frequency range of 0.02-1.0 Hz, during the paradoxical sleep. This confirms that the characteristics of fluctuations in neuronal activities of the mesencephalic reticular formation observed in our previous study are more general phenomena in the cat's brain. Partly similar behavior of spectral densities is also observed during the alert state. These observations are quantitatively confirmed by the statistical time series analysis of the spike density processes of spontaneous activities.
KW - 1 f{hook} Fluctuation
KW - Hippocampus
KW - Sleep-wakefulness
KW - Spontaneous discharge
KW - Ventrobasal complex
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U2 - 10.1016/0006-8993(89)90936-0
DO - 10.1016/0006-8993(89)90936-0
M3 - Article
C2 - 2752287
AN - SCOPUS:0024358407
VL - 487
SP - 26
EP - 34
JO - Molecular Brain Research
JF - Molecular Brain Research
SN - 0006-8993
IS - 1
ER -