| Activity of Pursuit-Related Neurons in Medial Superior Temporal Area (MST) during Static Roll-Tilt. | |
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MedLine Citation:
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PMID: 20421248 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Recent studies have shown that rhesus macaques can perceive visual motion direction in earth-centered coordinates as accurately as humans. We tested whether coordinate frames representing smooth pursuit and/or visual motion signals in medial superior temporal area (MST) are earth centered to better understand its role in coordinating smooth pursuit. In 2 Japanese macaques, we compared preferred directions (re monkeys' head-trunk axis) of pursuit and/or visual motion responses of MSTd neurons while upright and during static whole-body roll-tilt. In the majority (41/51 = 80%) of neurons tested, preferred directions of pursuit and/or visual motion responses were not significantly different while upright and during 40° static roll-tilt. Preferred directions of the remaining 20% of neurons (n = 10) were shifted beyond the range expected from ocular counter-rolling; the maximum shift was 14°, and the mean shift was 12°. These shifts, however, were still less than half of the expected shift if MST signals are coded in the earth-centered coordinates. Virtually, all tested neurons (44/46 = 96%) failed to exhibit a significant difference between resting discharge rate while upright and during static roll-tilt while fixating a stationary spot. These results suggest that smooth pursuit and/or visual motion signals of MST neurons are not coded in the earth-centered coordinates; our results favor the head- and/or trunk-centered coordinates. |
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Authors:
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Keishi Fujiwara; Teppei Akao; Sergei Kurkin; Kikuro Fukushima |
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Publication Detail:
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Type: Journal Article Date: 2010-04-26 |
Journal Detail:
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Title: Cerebral cortex (New York, N.Y. : 1991) Volume: 21 ISSN: 1460-2199 ISO Abbreviation: Cereb. Cortex Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2010-12-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9110718 Medline TA: Cereb Cortex Country: United States |
Other Details:
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Languages: eng Pagination: 155-65 Citation Subset: IM |
Affiliation:
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Department of Physiology. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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