Skip to main content

Research Repository

Advanced Search

Time course of the involvement of the ventral and dorsal visual processing streams in a visuospatial task

Ellison, A.; Cowey, A.

Time course of the involvement of the ventral and dorsal visual processing streams in a visuospatial task Thumbnail


Authors

A. Cowey



Abstract

A previous transcranial magnetic stimulation (TMS) study [Ellison, A., & Cowey, A. (2006). TMS can reveal contrasting functions of the dorsal and ventral visual processing streams. Experimental Brain Research, 175, 618–625] showed that both the dorsal and ventral cortical visual processing streams are involved in the processing of a task in which judgement of relative spatial position is required. In order to determine whether both streams are active in a parallel or serial manner, a double pulse TMS (20 Hz) experiment was carried out to expose peaks of disruption, indicative of when each of the areas under investigation is most potently involved. Results show that TMS over lateral occipital cortex produces greater disruption of performance than that provoked by TMS over posterior parietal cortex, significantly so when applied at 50 and 100 ms post-visual array onset. Both areas showed peaks of disruption up to 350 ms after visual stimulus onset. The results are discussed with respect to why each of these areas is involved in this task and what the pattern of their involvement reveals.

Citation

Ellison, A., & Cowey, A. (2007). Time course of the involvement of the ventral and dorsal visual processing streams in a visuospatial task. Neuropsychologia, 45(14), 3335-3339. https://doi.org/10.1016/j.neuropsychologia.2007.06.014

Journal Article Type Article
Publication Date Jun 29, 2007
Deposit Date Oct 17, 2008
Publicly Available Date Mar 28, 2024
Journal Neuropsychologia
Print ISSN 0028-3932
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 45
Issue 14
Pages 3335-3339
DOI https://doi.org/10.1016/j.neuropsychologia.2007.06.014
Keywords Ventral stream, Dorsal stream, Visual discrimination, Transcranial magnetic stimulation.

Files





You might also like



Downloadable Citations