[Change in phenamine stereotypy in cats after the electrical stimulation of the caudate nucleus]

Two types of behavioral shifts occur in cats after cessation of repeated low-frequency stimulation of the caudate nucleus head. Behavioral depression originates more frequently from the dorsomedial part of the head whereas stimulation of the ventrolateral part induces the activation before depression. The number and pattern of stereotype movements are variously changed against the background of these shifts following administration of the minimal effective phenamine dose. Desorganization takes place after stimulation of the dorso-medial nucleus parts followed by stereotypy reduction or, on the contrary, by its enhancement in combination with caudate activation.