On-line brain potential correlates of right parietal patients' attentional deficit

Rolf Verleger*, Wolfgang Heide, Christian Butt, Edmund Wascher, Detlef Kömpf

*Corresponding author for this work
33 Citations (Scopus)


EEG potentials evoked by cues and targets were recorded in Posner's visual cueing task from 10 patients with lesions of the right parietal cortex and from age-matched healthy subjects. The patients' N1 component evoked by left-side cues was reduced at the right parietal recording site, suggesting a general impairment in processing left-side visual input. As usual, patients' keypress responses were delayed when left targets were preceded by right cues. There were two correlates of this delay in the patients' EEG potentials evoked by the critical combination of right cue/left target: their mean amplitude 160-280 ms after target onset ('Nd') was less negative than with other combinations of cue and target, and the following frontal P300 was enhanced. The Nd reduction seems to be an on-line measure of patients' momentary decrease of attention for the left hemifield, while the frontal P300 might reflect the patients' attempts at reorienting. In conclusion, different components were sensitive to different aspects of the patients' disorder, suggesting the utility of this approach for developing detailed hypotheses on the mechanisms of attentional deficits involved in visual extinction and neglect.

Original languageEnglish
JournalElectroencephalography and Clinical Neurophysiology
Issue number5
Pages (from-to)444-457
Number of pages14
Publication statusPublished - 01.01.1996

Research Areas and Centers

  • Academic Focus: Center for Brain, Behavior and Metabolism (CBBM)


Dive into the research topics of 'On-line brain potential correlates of right parietal patients' attentional deficit'. Together they form a unique fingerprint.

Cite this