Differential roles for frontal eye fields (FEFs) and intraparietal sulcus (IPS) in visual working memory and visual attention

Offen, Shani; Gardner, Justin L.; Schluppeck, Denis; Heeger, David J.

doi:10.1167/10.11.28

Cited by 37 publications

(23 citation statements)

References 75 publications

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“…Szczepanski et al (2013), using an attentional task, demonstrated spatial asymmetries in FEF, an area within the same fronto-parietal network as IPS. In addition, at least one paper has demonstrated FEF involvement in VSTM (Offen et al, 2010), though not in a memory-load dependent manner.…”

Section: Discussionmentioning

confidence: 99%

Hemifield asymmetries differentiate VSTM for single- and multiple-feature objects

Sheremata

Shomstein

2014

Atten Percept Psychophys

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Visual short-term memory (VSTM) is a capacity-limited system for maintaining visual information across brief durations. Limits in the amount of information held in memory reflect processing constraints in the intraparietal sulcus (IPS), a region of the fronto-parietal network also involved in visual attention. During VSTM and visual attention, areas of IPS demonstrate hemispheric asymmetries. While the left hemisphere represents information in only the right-hemifield, the right hemisphere represents information across the visual field. In visual attention, hemispheric asymmetries are associated with differences in behavioral performance across the visual field. In order to assess the degree of hemifield asymmetries in VSTM, we measured memory performance across the visual field for both single- and two- feature objects. Consistent with theories of right hemisphere dominance, there was a memory benefit for single-feature items in the left visual hemifield. However, when the number of features increased, the behavioral bias reversed, demonstrating a benefit for remembering two-feature objects in the right-hemifield. On an individual basis, the cost of remembering an additional feature in the hemifields was correlated, suggesting that the shift in hemifield biases reflected a redistribution of resources across the visual field. Furthermore, we demonstrate that these results cannot be explained by differences in perceptual or decision making load. Our results are consistent with a flexible resource model of VSTM in which attention and/or working memory demands result in representation of items in the right hemifield by both the left and right hemispheres.

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Section: Discussionmentioning

confidence: 99%

Hemifield asymmetries differentiate VSTM for single- and multiple-feature objects

Sheremata

Shomstein

2014

Atten Percept Psychophys

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“…The lack of sustained activity in the IPS is not consistent with other reports on visual working memory tasks (Curtis & D'Esposito, 2006; Schluppeck et al, 2006; Srimal & Curtis, 2008). However, our finding of specific patterns of activation in the absence of sustained activation might explain why sustained activation in the IPS during a visual working memory task has not always been replicated (Offen, Gardner, Schluppeck, & Heeger, 2010). …”

Section: Discussionmentioning

confidence: 92%

Differential roles of the frontal and parietal cortices in the control of saccades

Bender

Tark

Reuter

et al. 2013

Brain and Cognition

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Although externally as well as internally-guided eye movements allow us to flexibly explore the visual environment, their differential neural mechanisms remain elusive. A better understanding of these neural mechanisms will help us to understand the control of action and to elucidate the nature of cognitive deficits in certain psychiatric populations (e.g. schizophrenia) that show increased latencies in volitional but not visually-guided saccades. Both the superior precentral sulcus (sPCS) and the intraparietal sulcus (IPS) are implicated in the control of eye movements. However, it remains unknown what differential contributions the two areas make to the programming of visually-guided and internally-guided saccades. In this study we tested the hypotheses that sPCS and IPS distinctly encode internally-guided saccades and visually-guided saccades. We scanned subjects with fMRI while they generated visually-guided and internally-guided delayed saccades. We used multi-voxel pattern analysis to test whether patterns of cue related, preparatory and saccade related activation could be used to predict the direction of the planned eye movement. Results indicate that patterns in the human sPCS predicted internally-guided saccades but not visually-guided saccades in all trial periods and patterns in the IPS predicted internally-guided saccades and visually-guided saccades equally well. The results support the hypothesis that the human sPCS and IPS make distinct contributions to the control of volitional eye movements.

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“…It is well established from studies in monkeys and humans that the posterior parietal cortex, and more specifically LIP, is crucial for spatial attention (Corbetta et al, 2002;Bisley and Goldberg, 2003;Owen et al, 2006). Attending to and tracking an object in space also involves working memory (Ricciardi et al, 2006;Offen et al, 2010), which may explain the DLPFC activation in our IOM task.…”

Section: Discussionmentioning

confidence: 93%

Functional Parcellation of the Lateral Mesencephalus

Karachi¹,

André²,

Bertasi³

et al. 2012

Journal of Neuroscience

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The mesencephalic locomotor region (MLR), which includes the pedunculopontine nucleus (PPN) and the cuneiform nucleus (CN), has been recently identified as a key structure for locomotion and gait control in mammals. However, the function and the precise anatomy of the MLR remain unclear in humans. To study the lateral mesencephalus, we used fMRI in 15 right-handed healthy volunteers performing two tasks: imagine walking in a hallway and imagine an object moving along the same hallway. Both tasks were performed at two different speeds: normal and 30% faster. We identified two distinct networks of cortical activation: one involving motor/premotor cortices and the cerebellum for the walking task and the other involving posterior parietal and dorsolateral prefrontal cortices for the object moving task. In the lateral mesencephalus, we found that two different but anatomically connected parts of the MLR were activated during the fast condition of each task. The CN and the dorsal part of the PPN were activated during the fast imaginary walking task, whereas the ventral part of the PPN and the ventral part of the reticular formation were activated while subjects were imagining the object moving fast. Our data suggest that the lateral mesencephalus participates in different aspects of gait in humans, with the CN and dorsal PPN controlling motor aspects of locomotion and the ventral PPN being involved in integrating sensory information.

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Differential roles for frontal eye fields (FEFs) and intraparietal sulcus (IPS) in visual working memory and visual attention

Cited by 37 publications

References 75 publications

Hemifield asymmetries differentiate VSTM for single- and multiple-feature objects

Hemifield asymmetries differentiate VSTM for single- and multiple-feature objects

Differential roles of the frontal and parietal cortices in the control of saccades

Functional Parcellation of the Lateral Mesencephalus

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