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Timing of visuo-spatial information processing: electrical source imaging related to line bisection judgements.
Neuropsychologia. 2008 Apr; 46(5):1201-10.N

Abstract

This study deconvolves the temporal dynamics of the neural processes underlying line bisection judgements (i.e., the landmark task). Event-related potentials (ERPs) were recorded from 96 scalp electrodes in 10 healthy right-handed male subjects while they were judging whether horizontal lines were correctly prebisected. In the control task, subjects judged whether or not the horizontal line was transected by a vertical line, irrespective of its position. Using a current density reconstruction approach, source maxima in the time range from 50 to 400ms after stimulus onset were localized and the time courses of activation were elaborated. Five regions, corresponding to those revealed by our previous fMRI studies (e.g., [Fink, G. R., Marshall, J. C., Shah, N. J., Weiss, P. H., Halligan, P. W., Grosse-Ruyken, et al. (2000). Line bisection judgments implicate right parietal cortex and cerebellum as assessed by fMRI. Neurology, 54, 1324-1331]), were identified as contributing significant source activity related to line bisection judgements: right middle occipital gyrus (Brodmann area; BA18); bilateral inferior occipital gyrus (BA19); right superior posterior parietal cortex (BA7) and right inferior posterior parietal cortex (BA40). Temporal deconvolution indicated sequential activation of these regions starting at BA18 as early as 90ms post-stimulus onset, followed by the successive activation of the right superior posterior parietal (BA7), bilateral inferior occipital (BA19) and right inferior posterior parietal cortex (BA40). Three of these areas (BA18, BA17 and BA19) became reactivated within 250ms of stimulus onset. The data provide evidence for an early involvement of the right hemispheric parietal network in visuo-spatial information processing. Furthermore, the temporal deconvolution of the electrophysiological data suggest that iterative processes between and within parietal (dorsal path) and occipital areas (ventral path) mediate bisection judgements.

Authors+Show Affiliations

Department of Neurology, University Hospital Aachen, Pauwelsstr. 30, RWTH Aachen, D-52057 Aachen, Germany. Till.Waberski@post.rwth-aachen.deNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18249421

Citation

Waberski, Till D., et al. "Timing of Visuo-spatial Information Processing: Electrical Source Imaging Related to Line Bisection Judgements." Neuropsychologia, vol. 46, no. 5, 2008, pp. 1201-10.
Waberski TD, Gobbelé R, Lamberty K, et al. Timing of visuo-spatial information processing: electrical source imaging related to line bisection judgements. Neuropsychologia. 2008;46(5):1201-10.
Waberski, T. D., Gobbelé, R., Lamberty, K., Buchner, H., Marshall, J. C., & Fink, G. R. (2008). Timing of visuo-spatial information processing: electrical source imaging related to line bisection judgements. Neuropsychologia, 46(5), 1201-10. https://doi.org/10.1016/j.neuropsychologia.2007.10.024
Waberski TD, et al. Timing of Visuo-spatial Information Processing: Electrical Source Imaging Related to Line Bisection Judgements. Neuropsychologia. 2008;46(5):1201-10. PubMed PMID: 18249421.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Timing of visuo-spatial information processing: electrical source imaging related to line bisection judgements. AU - Waberski,Till D, AU - Gobbelé,René, AU - Lamberty,Kathrin, AU - Buchner,Helmut, AU - Marshall,John C, AU - Fink,Gereon R, Y1 - 2007/11/09/ PY - 2007/04/20/received PY - 2007/10/26/revised PY - 2007/10/30/accepted PY - 2008/2/6/pubmed PY - 2008/7/23/medline PY - 2008/2/6/entrez SP - 1201 EP - 10 JF - Neuropsychologia JO - Neuropsychologia VL - 46 IS - 5 N2 - This study deconvolves the temporal dynamics of the neural processes underlying line bisection judgements (i.e., the landmark task). Event-related potentials (ERPs) were recorded from 96 scalp electrodes in 10 healthy right-handed male subjects while they were judging whether horizontal lines were correctly prebisected. In the control task, subjects judged whether or not the horizontal line was transected by a vertical line, irrespective of its position. Using a current density reconstruction approach, source maxima in the time range from 50 to 400ms after stimulus onset were localized and the time courses of activation were elaborated. Five regions, corresponding to those revealed by our previous fMRI studies (e.g., [Fink, G. R., Marshall, J. C., Shah, N. J., Weiss, P. H., Halligan, P. W., Grosse-Ruyken, et al. (2000). Line bisection judgments implicate right parietal cortex and cerebellum as assessed by fMRI. Neurology, 54, 1324-1331]), were identified as contributing significant source activity related to line bisection judgements: right middle occipital gyrus (Brodmann area; BA18); bilateral inferior occipital gyrus (BA19); right superior posterior parietal cortex (BA7) and right inferior posterior parietal cortex (BA40). Temporal deconvolution indicated sequential activation of these regions starting at BA18 as early as 90ms post-stimulus onset, followed by the successive activation of the right superior posterior parietal (BA7), bilateral inferior occipital (BA19) and right inferior posterior parietal cortex (BA40). Three of these areas (BA18, BA17 and BA19) became reactivated within 250ms of stimulus onset. The data provide evidence for an early involvement of the right hemispheric parietal network in visuo-spatial information processing. Furthermore, the temporal deconvolution of the electrophysiological data suggest that iterative processes between and within parietal (dorsal path) and occipital areas (ventral path) mediate bisection judgements. SN - 0028-3932 UR - https://www.unboundmedicine.com/medline/citation/18249421/Timing_of_visuo_spatial_information_processing:_electrical_source_imaging_related_to_line_bisection_judgements_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0028-3932(07)00371-5 DB - PRIME DP - Unbound Medicine ER -