ISSN:
1432-0770
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
,
Informatik
,
Physik
Notizen:
Abstract The order and the values of Markov properties of nonstationary stochastic processes are inferred by the use of them-th order Markov value and simplified dependency , respectively: and HereK=0.5log2 e, and $$\left| {\hat R_m } \right|$$ is the correlation coefficient determinant obtained from the ensemble averages of sample records. When an observed value is greater than or equal to the critical value, , the null hypothesis of the (m-1)th order, , is rejected at the level of significance α. Hereχ 1 2 (α) is the chi-square value with one degree of freedom at α andN is sample size. With these statistics it was shown that the order and the values of Markov properties of spike trains of optic tractX- andY-fibers became higher and larger, respectively, after the light spot presentation; and that the values due to negative correlation came to increase and returned to the maintained level earlier inY-fibers than inX-fibers, while the maximum values forX-fibers continued to the light off. It is discussed that Markov properties of spike trains of optic tract fibers in the visual pathway seem to constitute a significant component of the neural information code.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01845843
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