Partially Mixed Selectivity in Human Posterior Parietal Association Cortex.

ABSTRACT: To clarify the organization of motor representations in posterior parietal cortex, we test how three motor variables (body side, body part, cognitive strategy) are coded in the human anterior intraparietal cortex. All tested movements were encoded, arguing against strict anatomical segregation of effectors. Single units coded for diverse conjunctions of variables, with different dimensions anatomically overlapping. Consistent with recent studies, neurons encoding body parts exhibited mixed selectivity. This mixed selectivity resulted in largely orthogonal coding of body parts, which "functionally segregate" the effector responses despite the high degree of anatomical overlap. Body side and strategy were not coded in a mixed manner as effector determined their organization. Mixed coding of

SUBMITTER: Zhang CY 

PROVIDER: S-EPMC5572762 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature