The dominant focus is a temporarily dominant reflex system controlling the activity of neural centers at a given moment; the influence of particular cortical foci on particular efferent systems under these circumstances is variable in time, and the “center” loses its role as an apparatus with a special functional significance. The ability to form dominant foci of excitation is a general property of the central nervous system. Diffuse waves from stimuli of different modalities excite all centers which at that moment are sufficiently excitable, but a dominant focus is formed only in those centers which can summate excitation. The transmission of traces from one moment to another must play a vital role in this process (Ukhtomskii, 1926).
KeywordsMedial Geniculate Body Slow Potential Medial Thalamus Dominant Focus Slow Cortical Potential
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