A Statistical Analysis of Spontaneous Activity of the Temperature-sensitive Neurone in Hypothalamus of Rats
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Discharges of temperature- sensitive neurones were recorded in the preoptic region of urethanized rats, with simultaneous monitoring of brain temperature in region. Measurement of interspike intervals and calulation of statistical variables concerning the spike train were carried out. The results were as follows: 1) In all temperature-sensitive neurones, the standard deviation of interspike intervals increases in linear proportion to the value of the mean interval, but the changes of standard deviation with relation to mean interval is different in neurones with different distribution of interspike interval histograms. 2) Interspike interval histograms of temperature-sensitive neurones were classified into two forms. The intervals were then classifiled into about ten time bins; a) single valued and monotonic distribution (exponential form) and b) skewed distribution with one peak (Gramma form). 3) There was statistically no relation between the temperature quotient and type of interval histogram of temperature-sensitive neurone. 4) Based on serial correction coefficients (SCCs) of spike trains, in general, spontaneous activity of hypothalamic temperature-sensitive neurones with exponential distribution of interval histogram is order-independent, while these of other types of neurones depend on the order of spikes. In some neurones slow variations of SCCs were obtained regardless of the type of interval histogram of the temperature-sensitive neurones.
- Yamaguchi University Graduate School of Medicineの論文
Yamaguchi University Graduate School of Medicine | 論文
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