Stimulus-driven Coordination of Cortical Cell Assemblies and Propagation of Gestalt Belief in V1
Stimulus-driven Coordination of Cortical Cell Assemblies and Propagation of Gestalt Belief in V1
This chapter explores dynamic coordination in the primary sensory cortex of mammals during low-level (non-attention-related) perception. It considers the possible existence of subcortical or cortical supervisors in higher mammals and explains how coordination is generated by the sensory drive and amplified by built-in anisotropies in the network connectivity. Drawing on synaptic functional imaging (at the intracellular level) and real-time voltage-sensitive dye network imaging (at the functional map level), it illustrates the role of intracortical depolarizing waves whose functional features support the hypothesis of a dynamic association field. These waves help propagate synaptic modulation in space and time via lateral (and perhaps feedback) connectivity, which explains the emergence of illusions predicted by Gestalt theory. The chapter also explains how lateral propagation waves are reconstructed from synaptic echoes and looks at the propagation of orientation belief.
Keywords: dynamic coordination, primary sensory cortex, mammals, perception, depolarizing waves, synaptic modulation, illusions, Gestalt theory, propagation waves, belief
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