Interhemispheric interaction when both hemispheres have access to the same stimulus information.

Hellige, Joseph B.; Taylor, Annette K.; Eng, Tami Lee

doi:10.1037/0096-1523.15.4.711

Cited by 70 publications

(132 citation statements)

References 17 publications

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“…The problem of ''metacontrol'' rarely has a simple solution (Levy et al, 1976). In some cases, performance is dominated by whichever hemisphere is superior at the given task (e.g., Hellige et al, 1989). In other cases, task performance during bilateral trials looks nothing like task performance by either hemisphere in isolation (Banich and Karol, 1992).…”

Section: Using Lateralized Presentationsmentioning

confidence: 99%

The perirhinal cortex modulates V2 activity in response to the agreement between part familiarity and configuration familiarity

Peterson¹,

Cacciamani²,

Barense³

et al. 2012

Hippocampus

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ABSTRACT:Research has demonstrated that the perirhinal cortex (PRC) represents complex object-level feature configurations, and participates in familiarity versus novelty discrimination. Barense et al. [(in press) Cerebral Cortex, 22:11, doi:10.1093/cercor/bhr347] postulated that, in addition, the PRC modulates part familiarity responses in lower-level visual areas. We used fMRI to measure activation in the PRC and V2 in response to silhouettes presented peripherally while participants maintained central fixation and performed an object recognition task. There were three types of silhouettes: Familiar Configurations portrayed realworld objects; Part-Rearranged Novel Configurations created by spatially rearranging the parts of the familiar configurations; and Control Novel Configurations in which both the configuration and the ensemble of parts comprising it were novel. For right visual field (RVF) presentation, BOLD responses revealed a significant linear trend in bilateral BA 35 of the PRC (highest activation for Familiar Configurations, lowest for Part-Rearranged Novel Configurations, with Control Novel Configurations in between). For left visual field (LVF) presentation, a significant linear trend was found in a different area (bilateral BA 38, temporal pole) in the opposite direction (Part-Rearranged Novel Configurations highest, Familiar Configurations lowest). These data confirm that the PRC is sensitive to the agreement in familiarity between the configuration level and the part level. As predicted, V2 activation mimicked that of the PRC: for RVF presentation, activity in V2 was significantly higher in the left hemisphere for Familiar Configurations than for Part-Rearranged Novel Configurations, and for LVF presentation, the opposite effect was found in right hemisphere V2. We attribute these patterns in V2 to feedback from the PRC because receptive fields in V2 encompass parts but not configurations. These results reveal two new aspects of PRC function: (1) it is sensitive to the congruency between the familiarity of object configurations and the parts comprising those configurations and (2) it likely modulates familiarity responses in visual area V2. V V C 2012 Wiley Periodicals, Inc.

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Section: Using Lateralized Presentationsmentioning

confidence: 99%

The perirhinal cortex modulates V2 activity in response to the agreement between part familiarity and configuration familiarity

Peterson¹,

Cacciamani²,

Barense³

et al. 2012

Hippocampus

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show abstract

“…Such findings indicate that qualitatively different processes may be at play when hemispheric interactions underlie performance compared with when a single hemisphere does. Third, when the cerebral hemispheres cooperate to perform a task, they sometimes both adopt the processing mode of the less efficient hemisphere, possibly because it is more difficult for the less efficient hemisphere to adopt the processing mode of the more efficient hemisphere (e.g., Hellige, Taylor, & Eng, 1989). Thus, when the hemispheres interact, each may underlie operations that it is not specialized to perform.…”

Section: Discussionmentioning

confidence: 99%

A hemispheric division of labor aids mental rotation.

Yoshizaki¹,

Weissman²,

Banich³

2007

Neuropsychology

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In the present study, we investigated whether a hemispheric division of labor is most advantageous to performance when lateralized inputs place unequal resource demands on the left and right cerebral hemispheres. In each trial, participants decided whether 2 rotated letters, presented either in the same visual field (within-field trials) or in opposite visual fields (across-field trials), were both of normal orientation, or whether one was normal and the other was mirror-reversed. To discriminate a letter's orientation, one must rotate the letter to the upright position. Therefore, we manipulated whether the two letters imposed similar or dissimilar demands on cognitive resources by varying the number of degrees that each letter needed to be rotated to reach the upright position. As predicted, in 2 experiments we found that the across-field advantage increased as the number of degrees each letter needed to be rotated became more dissimilar. These findings support a current model of hemispheric interactions, which posits that an unequal hemispheric distribution of cognitive load allows the cerebral hemispheres to take the lead for different aspects of cognitive processing.Although it is widely recognized that the left and right cerebral hemispheres process information quite differently (Hellige, 1993;Springer & Deutsch, 1998), relatively little is known about how interactions between the cerebral hemispheres modulate cognitive processing. Recently, Banich and colleagues (Banich, 1998;Banich & Belger, 1990) have proposed that a division of processing across the hemispheres increases the processing capacity of the brain. According to Banich (1998), a division of critical information across the hemispheres allows for a more efficient hemispheric division of labor than does directing critical information to a single hemisphere. In support of this view, Banich and colleagues have consistently demonstrated that as the resource demands for a task increase, across-field processing (i.e., a division of critical information across the left and right visual fields) becomes more advantageous to performance relative to withinfield processing (e.g

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“…Recognizing the need to provide subjects with further encouragement to fixate centrally, a number of researchers have used the indirect method of briefly presenting a single stimulus centrally, prior to or simultaneously with lateralized targets. Subjects are required to identify the central stimulus along with the lateralized targets on each trial (see, e.g., Boles, 1983Boles, , 1985Hellige, Taylor, & Eng, 1989;Luh & Levy, 1995;McKeever & Huling, 1971;Wagner & Harris, 1994). The logic underlying this approach is that, unless subjects are fixating centrally at the time of target presentation, they will be unable to report the centrally presented stimulus correctly.…”

Section: Techniques For Ensuring Central Fixationmentioning

confidence: 99%

Increasing the benefits of eye-tracking devices in divided visual field studies of cerebral asymmetry

Patching

Jordan

1998

Behavior Research Methods, Instruments, & Computers

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Interhemispheric interaction when both hemispheres have access to the same stimulus information.

Cited by 70 publications

References 17 publications

The perirhinal cortex modulates V2 activity in response to the agreement between part familiarity and configuration familiarity

The perirhinal cortex modulates V2 activity in response to the agreement between part familiarity and configuration familiarity

A hemispheric division of labor aids mental rotation.

Increasing the benefits of eye-tracking devices in divided visual field studies of cerebral asymmetry

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