[Formation of a mosaic of neuronal activity from microfoci of excitation in rat cerebral cortex].
Responses of several neurons from area 17 in the rat visual cortex to illumination with round spots of growing size were recorded. The size and shape of receptive fields of the neurons were determined. When the spot was placed into the central part of the receptive fields of neurons situated along one vertical run, distribution analysis of excited, inhibited, and non-responding neurons here showed that microlocus of excitation was being formed in the middle layers of the visual cortex. As the spot became larger, the neuronal ensemble "grew" up to a certain critical size, beyond which the microlocus of excitation divided, and the mosaic of neuronal ensembles began to form reaching maximal clear-cutness of diffuse illumination of the eye.
D000818:Animals; D001931:Brain Mapping; D004594:Electrophysiology; D051381:Rats; D014793:Visual Cortex / Q000502:physiology*; D014794:Visual Fields; D014796:Visual Perception / Q000502:physiology*
O formirovanii iz mikroochagov vozbuzhdeniia mozaiki aktivnosti neĭronov v kore mozga krysy.