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Activity of pursuit neurons in the caudal part of the frontal eye fields during static roll-tilt
| Title: | Activity of pursuit neurons in the caudal part of the frontal eye fields during static roll-tilt |
| Authors: | Kurkin, Sergei A. Browse this author →KAKEN DB | | Akao, Teppei Browse this author | | Fukushima, Junko Browse this author →KAKEN DB | | Fukushima, Kikuro Browse this author →KAKEN DB |
| Keywords: | Smooth pursuit | | Frontal eye fields | | Coordinate frames | | Preferred direction | | Resting rate | | Static roll-tilt | | Monkey |
| Issue Date: | Feb-2007 |
| Publisher: | Springer Berlin / Heidelberg |
| Journal Title: | Experimental Brain Research |
| Volume: | 176 |
| Issue: | 4 |
| Start Page: | 658 |
| End Page: | 664 |
| Publisher DOI: | 10.1007/s00221-006-0830-y |
| PMID: | 17216147 |
| Abstract: | The smooth-pursuit system and vestibular system interact to keep the retinal target image on the fovea during head and/or whole body movements. The caudal part of the frontal eye fields (FEF) in the fundus of arcuate sulcus contains pursuit neurons and the majority of them respond to vestibular stimulation induced by whole-body rotation, that activates primarily semi-circular canals, and by whole-body translation, that activates otoliths. To examine whether coordinate frames representing FEF pursuit signals are orbital or earth-vertical, we compared preferred directions during upright and static, whole-body roll-tilt in head- and trunk-restrained monkeys. Preferred directions (re monkeys’ head/trunk axis) of virtually all pursuit neurons tested (n = 21) were similar during upright and static whole-body roll-tilt. The slight shift of preferred directions of the majority of neurons could be accounted for by ocular counter-rolling. The mean (±SD) differences in preferred directions between upright and 40° right ear down and between upright and 40° left ear down were 6° (±6°) and 5° (±5°), respectively. Visual motion preferred directions were also similar in five pursuit neurons tested. To examine whether FEF pursuit neurons could signal static whole-body roll-tilt, we compared mean discharge rates of 29 neurons during fixation of a stationary spot while upright and during static, whole-body roll-tilt. Virtually all neurons tested (28/29) did not exhibit a significant difference in mean discharge rates between the two conditions. These results suggest that FEF pursuit neurons do not signal static roll-tilt and that they code pursuit signals in head/trunk-centered coordinates. |
| Rights: | The original publication is available at www.springerlink.com |
| Relation: | http://www.springerlink.com |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/18876 |
| 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)
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Submitter: 福島 菊郎
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