Skip to main content

Research Repository

Advanced Search

Testing the dorsal stream attention hypothesis: Electrophysiological correlates and the effects of ventral stream damage

Marrett, N.E.; de-Wit, L.H.; Roser, M.; Kentridge, R.W.; Milner, A.D.; Lambert, A.J.

Testing the dorsal stream attention hypothesis: Electrophysiological correlates and the effects of ventral stream damage Thumbnail


Authors

N.E. Marrett

L.H. de-Wit

M. Roser

A.D. Milner

A.J. Lambert



Abstract

The roles of dorsal and ventral processing streams in visual orienting and conscious perception were examined in two experiments. The first employed high density EEG with source localisation. The second comprised a neuropsychological case study. Visual orienting was assessed with an attention procedure, where peripheral letters cued participants towards a target location. In the perception procedure participants responded to the same letters by performing an explicit conscious discrimination. In Experiment 1, the peripheral letters elicited rapid dorsal-stream activation in the attention procedure, and this activation preceded top-down enhancement of target processing in occipital cortex. In the perception procedure early ventral-stream activation was seen. In addition, peripheral letters elicited an “early directing attention negativity” (EDAN) over parietal recording sites in the attention procedure, but not in the perception procedure. In Experiment 2, a patient with a bilateral ventral stream lesion but preserved dorsal stream function showed clear disruption to performance in the perception procedure, whilst exhibiting a normal visual orienting effect in the attention procedure. Taken together these findings (a) highlight the distinct roles of the dorsal and ventral streams in attention and perception, and (b) suggest how these streams might interact, via re-entrant effects of attention on perceptual processing.

Citation

Marrett, N., de-Wit, L., Roser, M., Kentridge, R., Milner, A., & Lambert, A. (2011). Testing the dorsal stream attention hypothesis: Electrophysiological correlates and the effects of ventral stream damage. Visual Cognition, 19(9), 1089-1121. https://doi.org/10.1080/13506285.2011.622729

Journal Article Type Article
Publication Date Nov 18, 2011
Deposit Date Feb 23, 2012
Publicly Available Date Mar 29, 2024
Journal Visual Cognition
Print ISSN 1350-6285
Electronic ISSN 1464-0716
Publisher Taylor and Francis Group
Peer Reviewed Peer Reviewed
Volume 19
Issue 9
Pages 1089-1121
DOI https://doi.org/10.1080/13506285.2011.622729
Keywords Attention, Visual perception, Visual orienting, Dorsal stream, Ventral stream.

Files

Accepted Journal Article (706 Kb)
PDF

Copyright Statement
This is an electronic version of an article published in Marrett, N.E. and de-Wit, L.H. and Roser, M. and Kentridge, R.W. and Milner, A.D. and Lambert, A.J. (2011) 'Testing the dorsal stream attention hypothesis : electrophysiological correlates and the effects of ventral stream damage.', Visual cognition., 19 (9). pp. 1089-1121. Visual cognition is available online at: http://www.tandfonline.com/openurl?genre=article&issn=1350-6285&volume=19&issue=9&spage=1089





You might also like



Downloadable Citations