[Formation of determinant structures and functional complexes in the neocortex when the brain is transected at different levels].

A strychnine focus created in the cat neocortex preparations with mediopontine section and encephale isolé, increased activity in other weaker foci, synchronized discharges in them, united them into a functional complex and determined the character of the whole complex activity. Such an hyperactive focus plays an active role of the determinant structure. In cortex isolé and preparations with mesencephalic section of the stem, a more rapid formation of functional complexes occurred under the effect of determinant focus. Complete elimination of the afferent and thalamo-cortical interactions seems to hinder neither the hypersynchronization of cortex neuronal elements, nor the formation of functional complexes, nor the generalization of seizure activity over the cortex.