Spatial working memory performance after high-frequency repetitive transcranial magnetic stimulation of the left and right posterior parietal cortex in humans
Rpc. Kessels et al., Spatial working memory performance after high-frequency repetitive transcranial magnetic stimulation of the left and right posterior parietal cortex in humans, NEUROSCI L, 287(1), 2000, pp. 68-70
The effects of high-frequency repetitive transcranial magnetic stimulation
(rTMS) at the left or right posterior parietal cortex were studied using a
spatial working memory task, Eight subjects were stimulated over the P3 and
P4 electrode site at 115% of the motor threshold (frequency 25 Hz, trains
of 200 ms) during the 1000-ms delay of the spatial working memory task, or
received sham stimulation. It was found that the reaction times were slower
during right-parietal rTMS than during left-parietal rTMS. No differences
were found between the percentages correct responses. These results are in
line with recent neuroimaging findings and data from patients with cerebral
lesions, suggesting that the posterior parietal cortex is especially invol
ved in spatial processing, and provide converging evidence for recent theor
ies on hemispheric specialization. (C) 2000 Elsevier Science Ireland Ltd. A
ll rights reserved.