Download Advances in Neural Population Coding by M.A.L. Nicolelis PDF

By M.A.L. Nicolelis

A collective study attempt via scientists operating in laboratories around the globe, this ebook addresses matters overlaying all features of neural inhabitants coding. This quantity, with contributions from distinctive neuroscientists, is split into six sections containing a ancient evaluation of the idea that of neural inhabitants, introducing a sequence of recent experimental paradigms and analytical options for investigating power neural coding schemes and 4 sections targeting contemporary advances in inhabitants coding in a extensive diversity of parts of mind examine.

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Comparison between the theoretical DTF (a) (and its inferred structural interactions (c)) and the theoretical PDC results (b) (with its signal flow diagram (d)). In both cases the signal flow graphs are constructed by assigning an arrow from the source structure (x-axis) to the targets (y-axis) when dark shaded areas are significant. The spectral densities for the time series are depicted along the shaded main diagonal of the arrays. The pairwise classical coherences (solid lines) are also depicted.

This acquires special importance in view of the fact that even PDC pairwise analysis may induce misleading conclusions about the nature of the interaction among neural elements. We therefore conclude that the use of techniques based on the processing pairwise time series are doomed to failure and that only the processing of many simultaneous structures can lead to an understanding of neural ensemble information processing and coding. Though unaddressed in this paper, statistical issues are important.

The temporal resolution of calcium imaging systems is usually not fast enough to see individual action potentials, only bursts of them. , 1993). It remains to be determined whether subtleties in action-potential timing responsible for the synaptic weight changes observed by Jimbo et al. (as described above) are also involved in neuronal survival. Optical recording of membrane voltage, in contrast to imaging calcium signals, can provide a direct, fast measure of electrical activity in many individual neurons of neuronal networks.

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