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  • cortex
  • To illustrate its unifying potential, this simple model is applied to two very distinct biological processes - the spontaneous activity of the human cortex (i.e. when subjects are at rest), and genetic regulation in a bacteriophage. (plos.org)
  • Those thalamic nuclei in turn project topographically to well-defined architectonic fields of cortex, which reciprocally project back topographically to their innervating thalamic nuclei. (scholarpedia.org)
  • From a given thalamic nucleus, core cells project topographically to a sharply bounded, associated architectonic field of cortex. (scholarpedia.org)
  • The rate-based "covariance protocol" induced significant and large amplitude changes in receptive field properties, in both kitten and adult V1 cortex. (frontiersin.org)
  • structures
  • Electrical potential changes related to brain activity measured at the scalp by EEG are fundamentally limited by the distortive effects of the intervening structures, which severely hamper efforts to localise the signal source precisely. (bmj.com)
  • voltage
  • The centre light response had a linear current-voltage relation with a reversal potential close to 0 mV. (nih.gov)
  • typically
  • These macroscopic models are the mean field models, and are typically extensions of the pioneering Wilson-Cowan equations (Wilson and Cowan, 1972). (scholarpedia.org)
  • activity
  • The first one, referred to as the "covariance" protocol, obeys a generalized Hebbian framework, by imposing, for different stimuli, supervised positive and negative changes in covariance between postsynaptic and presynaptic activity rates. (frontiersin.org)
  • local
  • Fortunately, we think that the dynamics of seizures fall into a much lower dimensional space as suggested by EEG , ECOG, and local field potential measurements. (scholarpedia.org)
  • Objects polarized by the discharge of a specialized electric organ project their images on the skin where electroreceptors tuned to the time course of the self-generated field transduce local signals carrying information about impedance, shape, size, and location of objects, as well as electrocommunication messages, and encode them as primary afferents trains of spikes. (oxfordre.com)
  • roles
  • These functions have been studied most extensively in the hippocampus because of its roles in learning and memory and of its architecture, which is compartmentalized well with the three major excitatory pathways: the perforant path, mossy fiber, and Schaffer collateral. (jneurosci.org)