NEUROBEHAVIORAL STUDY OF COLLICULECTOMIZED MONKEY

A battery of neurological tests was administered to normal and colliculectomized monkeys [Macaca mulatta] to determine the effect of the lesion on visually guided behavior, acoustically guided behavior, general locomotor performance and affective behavior. The tests were given at 1 wk and 3 mo. post-operatively. The behaviors of the animals were filmed, and the results were derived from a careful analysis of the films. The operated monkeys showed important deficits on most tests. After 3 mo. a considerable improvement was noted in many functions. Some behaviors were still totally or partially abnormal. An attempt is made to relate the completeness of the collicular resection and the duration of some of these symptoms.