Abstract
The middle latency response (MLR) was examined in cats under general anesthesia with nembutal.
A longitudinal section from the frontal lobe to the superior colliculi and a transvers section from the mid-line passing the left superior colliculi to the right side, and the same procedure in the inferior colliculi were made.
Uni- and bilateral medial geniculate bodies were destroyed by injection of Moljodol (contrast media) and by electrocoagulation.
The changes of MLR were recorded immediately and seven days after medial geniculate body destruction, and the areas were histologically examined.
The results were as follows:
1) The MLR was generated at the upper level of the superior colliculi.
2) Na component of MLR was mainly related to the contralateral medial geniculate body, and Pa component was suggested to be the compound response from a wide central area.
