PMID: 109247Mar 1, 1979

Principal sulcus and posterior parieto-occipital cortex lesions in the monkey

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
H V Soper


In order to assess the roles of the posterior parieto-occipital and principal sulcus cortices in processing spatial information, both with and without delays, monkeys were given lesions of one or the other area or no lesion and tested on a series of conditional discrimination tasks. There were six basic tasks, and the cue locations differed from the response locations within each task. The first two had mixed dimensions in that the location of the cue indicated the color of the correct response alternative or the color of the cue indicated the correct response location. The animals were trained preoperatively on these tasks and then tested for postoperative retention. For the next two tasks color was the only relevant dimension, but different colors were used for the cues and response alternatives. For the final two tasks location was the only relevant dimension. When an animal learned a given task it was subsequently tested on it with a 5-sec. delay. The deficits observed suggest that the roles of these areas can not be expressed simply in terms of spatial or delay functions. No group appeared to be impaired on any delay task on which it was tested. The animals with the posterior cortex removed had a great deal of difficulty i...Continue Reading


Feb 1, 1973·Journal of Comparative and Physiological Psychology·W Pohl
Aug 1, 1966·Journal of Comparative and Physiological Psychology·K H PribramD Gainsburg
Aug 1, 1971·Journal of Psychiatric Research·J M Petras
Jan 1, 1953·Proceedings of the Royal Society of Medicine·M CRITCHLEY
Jan 1, 1954·Brain : a Journal of Neurology·H HECAEN, J DE AJURIAGUERRA
Dec 1, 1963·Brain : a Journal of Neurology·J SEMMESH L TEUBER

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