Electrical Microstimulation Distinguishes Distinct Saccade-Related Areas in the Posterior Parietal Cortex

• DOI: 10.1152/jn.1998.80.4.1713
• Publication Date: 2017-12-25T04:40:17Z
• Authors: Peter Thier; Richard A. Andersen
• Keywords: Microstimulation; Parietal lobe

Thier, Peter and Richard A. Andersen. Electrical microstimulation distinguishes distinct saccade-related areas in the posterior parietal cortex. J. Neurophysiol. 80: 1713–1735, 1998. (0.1-ms bipolar pulses at 500 Hz, current strength usually between 100 200 μA) was used to delineate cortex of monkeys. Stimulation-induced saccades were found be restricted lateral intraparietal area (area LIP) sulcus (IPS) a region on medial aspect lobe MP, area), close caudal end cingulate sulcus, whereas stimulation 7a did not evoke eye movements. Two different types evoked observed. Modified vector saccades, whose amplitude modified by position eyes onset hallmark sites LIP MP. The same characterized propensity single units active memory presaccadic response segments saccade paradigm. Goal-directed driving toward circumscribed relative head largely small strip bank floor IPS (the intercalated zone), separating representation upward downward directed LIP. Unlike or zone gave rise head, pinnae, facial, shoulder movements accompanying saccades. We propose that modification characterizing MP may reflect spatially distributed head-centered coding scheme for On other hand, goal-directed could indicate use much more localized desired location space.