Role of the posterior parietal cortex in updating reaching movements to a visual target.

@article{citeulike:1224691, abstract = {The exact role of posterior parietal cortex (PPC) in visually directed reaching is unknown. We propose that, by building an internal representation of instantaneous hand location, PPC computes a dynamic motor error used by motor centers to correct the ongoing trajectory. With unseen right hands, five subjects pointed to visual targets that either remained stationary or moved during saccadic eye movements. Transcranial magnetic stimulation (TMS) was applied over the left PPC during target presentation. Stimulation disrupted path corrections that normally occur in response to target jumps, but had no effect on those directed at stationary targets. Furthermore, left-hand movement corrections were not blocked, ruling out visual or oculomotor effects of stimulation.}, address = {Emory University School of Medicine, Department of Neurology, Woodruff Memorial Building, Suite 6000, P.O. drawer V, Atlanta, Georgia 30322, USA.}, author = {Desmurget, M. and Epstein, C. M. and Turner, R. S. and Prablanc, C. and Alexander, G. E. and Grafton, S. T. }, citeulike-article-id = {1224691}, doi = {http://dx.doi.org/10.1038/9219}, issn = {1097-6256}, journal = {Nat Neurosci}, keywords = {lobe, movement, parietal, posterior, reaching, tms}, month = {June}, number = {6}, pages = {563--567}, posted-at = {2008-05-14 13:42:06}, priority = {4}, title = {Role of the posterior parietal cortex in updating reaching movements to a visual target.}, url = {http://dx.doi.org/10.1038/9219}, volume = {2}, year = {1999} }

TY - JOUR ID - citeulike:1224691 L3 - citeulike-article-id:1224691 TI - Role of the posterior parietal cortex in updating reaching movements to a visual target. JF - Nat Neurosci VL - 2 IS - 6 SP - 563 EP - 567 AD - Emory University School of Medicine, Department of Neurology, Woodruff Memorial Building, Suite 6000, P.O. drawer V, Atlanta, Georgia 30322, USA. SN - 1097-6256 N2 - The exact role of posterior parietal cortex (PPC) in visually directed reaching is unknown. We propose that, by building an internal representation of instantaneous hand location, PPC computes a dynamic motor error used by motor centers to correct the ongoing trajectory. With unseen right hands, five subjects pointed to visual targets that either remained stationary or moved during saccadic eye movements. Transcranial magnetic stimulation (TMS) was applied over the left PPC during target presentation. Stimulation disrupted path corrections that normally occur in response to target jumps, but had no effect on those directed at stationary targets. Furthermore, left-hand movement corrections were not blocked, ruling out visual or oculomotor effects of stimulation. KW - lobe KW - movement KW - parietal KW - posterior KW - reaching KW - tms AU - Desmurget, M AU - Epstein, CM AU - Turner, RS AU - Prablanc, C AU - Alexander, GE AU - Grafton, ST PY - 1999/06// UR - http://dx.doi.org/10.1038/9219 ER -