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Differential Neuronal Representation of Spatial Attention Dependent on Relative Target Locations during Multiple Object Tracking

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/57875

Title: Differential Neuronal Representation of Spatial Attention Dependent on Relative Target Locations during Multiple Object Tracking
Authors: Matsushima, Ayano Browse this author
Tanaka, Masaki Browse this author →KAKEN DB
Keywords: attentional capacity
bilateral advantage
MOT
prefrontal cortex
primate
single-unit recording
Issue Date: 23-Jul-2014
Publisher: Society for Neuroscience
Journal Title: Journal of Neuroscience
Volume: 34
Issue: 30
Start Page: 9963
End Page: 9969
Publisher DOI: 10.1523/JNEUROSCI.4354-13.2014
PMID: 25057198
Abstract: Humans can simultaneously track multiple moving objects with attention. The number of objects that can be tracked is known to be larger when visual stimuli are presented bilaterally rather than presented unilaterally. To elucidate the underlying neuronal mechanism, we trained monkeys to covertly track a single or multiple object(s). We found that neurons in the lateral prefrontal cortex exhibited greater activity for the target passing through the receptive field (RF) than for distractors. During multiple-object tracking, response enhancement for one target presented in the RF was stronger when the other target was located in the opposite than the same visual hemifield. Because the neuronal modulation did not differ depending on relative target locations with respect to upper and lower visual hemifields, the distance between the targets does not explain the results. We propose that inherent, anatomical separation of visual processing for contralateral and ipsilateral visual fields might constrain cognitive capacity.
Type: article
URI: http://hdl.handle.net/2115/57875
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田中 真樹

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