RRC ID 36453
著者 Inoue M, Harada H, Fujisawa M, Uchimura M, Kitazawa S.
タイトル Modulation of prism adaptation by a shift of background in the monkey.
ジャーナル Behav Brain Res
Abstract Recent human behavioral studies have shown that the position of a visual target is instantly represented relative to the background (e.g., a large square) and used for evaluating the error in reaching the target. In the present study, we examined whether the same allocentric mechanism is shared by the monkey. We trained two monkeys to perform a fast and accurate reaching movement toward a visual target with a square in the background. Then, a visual shift (20mm or 4.1°) was introduced by wedge prisms to examine the process of decreasing the error during an exposure period (30 trials) and the size of the error upon removal of the prisms (aftereffect). The square was shifted during each movement, either in the direction of the visual displacement or in the opposite direction, by an amount equal to the size of the visual shift. The ipsilateral shift of the background increased the asymptote during the exposure period and decreased the aftereffect, i.e., prism adaptation was attenuated by the ipsilateral shift. By contrast, a contralateral shift enhanced adaptation. We further tested whether the shift of the square alone could cause an increase in the motor error. Although the target did not move, the shift of the square increased the motor error in the direction of the shift. These results were generally consistent with the results reported in human subjects, suggesting that the monkey and the human share the same neural mechanisms for representing a target relative to the background.
巻・号 297
ページ 59-66
公開日 2016-1-15
DOI 10.1016/j.bbr.2015.09.032
PII S0166-4328(15)30208-4
PMID 26431765
MeSH Adaptation, Physiological* Adaptation, Psychological* Animals Functional Laterality Lenses* Macaca Male Photic Stimulation / methods* Psychomotor Performance* Psychophysics Visual Perception*
IF 2.977
引用数 5
WOS 分野 BEHAVIORAL SCIENCES NEUROSCIENCES
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