Deployment and release of interhemispheric inhibition in dual-stream rapid serial visual presentation
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Deployment and release of interhemispheric inhibition in dual-stream rapid serial visual presentation. / Śmigasiewicz, Kamila; Weinrich, Julius; Reinhardt, Bianka; Verleger, Rolf.
In: BIOL PSYCHOL, Vol. 99, 05.2014, p. 47-59.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Deployment and release of interhemispheric inhibition in dual-stream rapid serial visual presentation
AU - Śmigasiewicz, Kamila
AU - Weinrich, Julius
AU - Reinhardt, Bianka
AU - Verleger, Rolf
N1 - Copyright © 2014 Elsevier B.V. All rights reserved.
PY - 2014/5
Y1 - 2014/5
N2 - When one of the two hemispheres directs visuospatial attention to some contralateral location, this may imply that inhibition is exerted on the other hemisphere. In the dual rapid serial visual presentation task, two targets (T1 and T2) occur among two different visual streams, rapidly presented left and right. We replaced the standard letter distractors in one stream by "easy symbols" (ESy; easily distinguished from targets), to facilitate T1 identification. If interhemispheric inhibition is deployed and released, this facilitation of one hemisphere's task should reduce its inhibitory effect on the other hemisphere, leading to improved T2 identification by the other hemisphere. This prediction was confirmed in three experiments. Furthermore, event-related EEG potentials did not only show a constant bias of allocated attention between ESy and standard streams, with letters evoking visual potentials earlier than ESy, but also short-term enlargement of this effect in the pair of distractors that followed T1. Taken together, these results support the notion of interhemispheric inhibition in visuospatial attention.
AB - When one of the two hemispheres directs visuospatial attention to some contralateral location, this may imply that inhibition is exerted on the other hemisphere. In the dual rapid serial visual presentation task, two targets (T1 and T2) occur among two different visual streams, rapidly presented left and right. We replaced the standard letter distractors in one stream by "easy symbols" (ESy; easily distinguished from targets), to facilitate T1 identification. If interhemispheric inhibition is deployed and released, this facilitation of one hemisphere's task should reduce its inhibitory effect on the other hemisphere, leading to improved T2 identification by the other hemisphere. This prediction was confirmed in three experiments. Furthermore, event-related EEG potentials did not only show a constant bias of allocated attention between ESy and standard streams, with letters evoking visual potentials earlier than ESy, but also short-term enlargement of this effect in the pair of distractors that followed T1. Taken together, these results support the notion of interhemispheric inhibition in visuospatial attention.
KW - Adult
KW - Analysis of Variance
KW - Attention
KW - Brain Mapping
KW - Electroencephalography
KW - Evoked Potentials
KW - Female
KW - Functional Laterality
KW - Humans
KW - Inhibition (Psychology)
KW - Male
KW - Pattern Recognition, Visual
KW - Photic Stimulation
KW - Reaction Time
KW - Young Adult
KW - Journal Article
KW - Research Support, Non-U.S. Gov't
U2 - 10.1016/j.biopsycho.2014.02.008
DO - 10.1016/j.biopsycho.2014.02.008
M3 - SCORING: Journal article
C2 - 24576590
VL - 99
SP - 47
EP - 59
JO - BIOL PSYCHOL
JF - BIOL PSYCHOL
SN - 0301-0511
ER -
