Abstract

It has been shown in nonhuman primates that the posterior parietal cortex is involved in coordination of arm and eye movements in space, whereas the anterior intraparietal area in the anterior lateral bank of the intraparietal sulcus plays a crucial role in fine finger movements, such as grasping. In this study we show by optoelectronic movement recordings that patients with cortical lesions involving the anterior lateral bank of the intraparietal sulcus have selective deficits in the coordination of finger movements required for object grasping, whereas reaching is much less disturbed. Patients with parietal lesions sparing the cortex lining the anterior intraparietal sulcus showed intact grasping behavior. Complementary evidence was obtained from functional MRI in normal control subjects showing a specific activation of the anterior lateral bank of the intraparietal sulcus during grasping. In conclusion, this combined lesion and activation study suggests that the anterior lateral bank of the intraparietal sulcus, possibly including the human homologue of the anterior intraparietal area, mediates the processing of sensorimotor integration of precisely tuned finger movements in humans.

Keywords

Intraparietal sulcusNeurosciencePosterior parietal cortexParietal lobeSulcusCortex (anatomy)AnatomyPsychologyBiology

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Year
1998
Type
article
Volume
50
Issue
5
Pages
1253-1259
Citations
554
Access
Closed

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Ferdinand Binkofski, Christian Dohle, Stefan Posse et al. (1998). Human anterior intraparietal area subserves prehension. Neurology , 50 (5) , 1253-1259. https://doi.org/10.1212/wnl.50.5.1253

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DOI
10.1212/wnl.50.5.1253