Yuji Ikegaya , Modules of Cortical Activity Synfire Chains and Cortical Songs : Temporal
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چکیده
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منابع مشابه
Synfire chains and cortical songs: temporal modules of cortical activity.
How can neural activity propagate through cortical networks built with weak, stochastic synapses? We find precise repetitions of spontaneous patterns of synaptic inputs in neocortical neurons in vivo and in vitro. These patterns repeat after minutes, maintaining millisecond accuracy. Calcium imaging of slices reveals reactivation of sequences of cells during the occurrence of repeated intracell...
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Abstract: Precisely timed action potentials have been related to stimuli and behavior in monkeys, indicating that the neural coding may be based on precise spike timing of cortical neurons, synfire chains. An assumption that sensory information may be encoded by precise spike timing has been challenged by the critical question of whether synfire chains can successfully propagate through hierarc...
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We report a new brain signature of memory trace activation in the human brain revealed by magnetoencephalography and distributed source localization. Spatiotemporal patterns of cortical activation can be picked up in the time course of source images underlying magnetic brain responses to speech and noise stimuli, especially the generators of the magnetic mismatch negativity. We found that acous...
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Prompted by considerations about (i) the compositionality of cognitive functions. (ii) the physiology of individual cortical neurons, (iii) the role of accurately timed spike patterns in wrtex, and (iv) the regulation of global conical activity, we suggest that the dynamics of cartex on the 1-ms time scale may be described as the activation of circuits of the synfrechain type (Abeles 1982, 1991...
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