Physiological Basis of Handling and Visual Search for objects

物体处理和视觉搜索的生理基础

• 批准号: 10640694
• 负责人: HIRAI Naoki
• 金额: $ 2.05万
• 依托单位: Kyorin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640694/
• 关键词: vision; eyemovement; saccade; somatosensory; express saccade; reaction time; 手; 探索行動

The role of fixation, the subjects' response preparedness and somatosensory input in visual search and handling for an object, were, explored in seven human subjects. The-occurrence, frequencies of the, express saccades to the object were compared in the overlap (continuous presentation of fixation point), gap (fixation point offset, 0-400 ms prior to target onset) and no-fixation tasks under the conventional and self-initiation paradigms. In the latter paradigm, the subjects, when ready, touched a sensor in order to ignite the target lamp with a delay time of 0-400 ms (target onset delay time). The highest occurrence frequency of express saccades (saccades with shorter reaction time of 80-130 ms) was obtained when the gap paradigm was combined with the self-initiation paradigm with a delay time of 100 ms (62%). The value was higher by 20% than in the normal gap task.. The SRTs were reduced when somatosensory stimuli were applied previously to the target, onset time. These results suggest that the subjects' response preparedness and somatosensory input given as a warning signal have a potentiality to produce express saccades without fixation point offset.

以7名被试为研究对象，探讨了注视、被试的反应准备和体感输入在视觉搜索和处理物体中的作用。比较了常规范式和自启动范式下的重叠（注视点连续出现）、间隙（注视点偏移，在目标开始前0-400 ms）和无注视任务中对目标的快速扫视的发生频率。在后一种模式中，受试者在准备好后，触摸传感器以点燃目标灯，延迟时间为0-400 ms（目标启动延迟时间）。当间隙范式与延迟时间为100 ms的自启动范式相结合时，快速眼跳（反应时间较短，为80 ~ 130 ms）的出现频率最高（62%）。该值比正常的间隙任务高20%。当躯体感觉刺激先前应用于目标时，srt减少，发病时间。这些结果表明，受试者的反应准备和躯体感觉输入作为警告信号有可能产生无注视点偏移的表达性扫视。

项目成果

Hirai, N.: "Comparison of eye- head co-ordinated movements during voluntary and visually guided gazs shifts"Proc. Intn. Symp on Head/Neck System. 91 (1999)

Hirai, N.：“自愿和视觉引导气体转移期间眼头协调运动的比较”Proc。

Suzuki,T: "Effests of "visual offset" on sacadic reaction tinu"Jan J.Physiof. (in press). (2000)

铃木，T：““视觉偏移”对扫视反应的影响”Jan J.Physiof。

Suzuki, T,: "The role of fixation point and oufjects readiness in the occurrence of express saccade as revealed by the self initiation paradigm"Neuroscienc Res. 36. 235-244 (2000)

Suzuki, T,：“自启动范式揭示了注视点和 Oufjects 准备在快速扫视发生中的作用”，《神经科学研究》。

HIRAI,N.: "Gapeffects on latency of co-ordinated eye-head movement" Anthrop.Science. 106. 190 (1998)

HIRAI,N.：“间隙对协调眼头运动潜伏期的影响”人类科学。

Suzuki, T.: "Effect of "visual offset" on saccadic reaction time"Jpn J. Physiol.. (in press).

Suzuki, T.：““视觉偏移”对扫视反应时间的影响”Jpn J. Physiol..（出版中）。