chapter  VI
THE THALAMO-CORTICAL CIRCULATION OF NEURAL IMPULSE AND THE PSYCHO-NEUROSES
Pages 10

The essential thalamic organs, functioning in close inter-relationship with the cortical functional areas, furnish the neurological correlates of what from a psychological point of view are the affective factors to be detected in every process of perception and of thought." This chapter discusses the Thalamo-cortical circulation of neural impulse hypothesis four distinct kinds of intercommunication between the various parts of the entire system of thalamo-cortical functional areas. These are the cortical intercommunication tracts and association fibres connecting different functional areas in the cortex; the traditional cortical association areas of the anatomical textbooks; the thalamo-cortical and cortico-thalamic paths; and the essential thalamic organs functioning as thalamic association areas. Phylogenetically the thalami mostly belong to an older part of the brain than the neopallium-a part which was dominant in the lower vertebrates and from which the neopallium was developed much later.