Spatio-temporal interaction in the parallel pathways of visual system

视觉系统平行通路中的时空相互作用

• 批准号: 16500263
• 负责人: SATO Hiromichi
• 金额: $ 2.37万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16500263/
• 关键词: visual information processing; parallel pathway; metacontrast; primary visual cortex; receptive field; stimulus characteristics; contextual modulation

In the primary visual cortex (V1), a response to a stimulus in the classical receptive field (CRF) is suppressively modulated by a stimulus presented in the CRF surround (SRF). We examined the temporal dynamics of the response to CRF stimulation and the surround suppression in terms of spatial-frequency (SF) tuning of cat V1 neurons using stationary flashes of a circular sinusoidal grating patch (duration, 500ms) and an annulus (50ms) as CRF and SRF stimuli. In Experiment 1 (N=39), we stimulated CRF with grating patch of optimal orientation and varying SFs. The preferred SF shifted from low to high along time course of response. In Experiment 2 (N=48), CRF was stimulated with grating of optimal orientation and SF, while SRF was stimulated with grating of optimal orientation and varying SF sandstimulus-onset-asynchrony (SOA). SF tuning of surround suppression changed along time course of response, and effective SF of surround suppression shifted from the SF lower than that of CRF stimulus (CRF-SF) to that near CRF-SF. By changing SOA, we examined surround suppression on different temporal phases of CRF response. SRF stimulus only with low SF (<0.2c/deg) suppressed the initial phase of CRF response. These results suggest that multiple mechanisms with different SF- and temporal characteristics are involved in the surround suppression.

在初级视皮层（V1）中，对经典感受野（CRF）中刺激的反应受到CRF周围（SRF）中刺激的抑制性调制。我们研究了时间动态的CRF刺激和周围的抑制猫V1神经元的空间频率（SF）调谐使用固定闪光的圆形正弦光栅补丁（持续时间，500毫秒）和环形（50毫秒）作为CRF和SRF刺激的反应。在实验一（N = 39）中，我们用最佳取向的光栅贴片和不同的SF刺激CRF。首选的SF随着反应时间的推移从低到高。实验2（N = 48）中，用最佳方向和SF的光栅刺激CRF，而用最佳方向和不同SF的光栅以及刺激开始不同步（SOA）刺激SRF。环绕抑制的SF调谐随时间变化，环绕抑制的有效SF从低于CRF刺激的SF（CRF-SF）向接近CRF-SF的SF转移。通过改变SOA，我们检查了对CRF反应不同时间阶段的环绕抑制。仅低SF（<0.2c/deg）的SRF刺激抑制CRF反应的起始相。这些结果表明，具有不同的SF和时间特性的多种机制参与了环绕抑制。

项目成果

Metacontrast masking suggests interaction between visual pathway with different spatial and temporal properties

元对比掩蔽表明具有不同空间和时间特性的视觉通路之间的相互作用

• 发表时间: 2006
• 期刊: Vision Research 46
• 作者: Ishikawa;A.;Shimegi;S.;Sato;H.
• 通讯作者: H.

Metacontrast masking suggests interaction between visual pathways with different spatial and temporal properties

• DOI: 10.1016/j.visres.2005.12.013
• 发表时间: 2006-06-01
• 期刊: VISION RESEARCH
• 影响因子: 1.8
• 作者: Ishikawa, Ayako;Shimegi, Satoshi;Sato, Hiromichi
• 通讯作者: Sato, Hiromichi

Relationship between excitation and inhibition underlying size tuning and contextual response modulation in the cat primary visual cortex

• DOI: 10.1523/jneurosci.3852-03.2004
• 发表时间: 2004-02-11
• 期刊: JOURNAL OF NEUROSCIENCE
• 影响因子: 5.3
• 作者: Ozeki, H;Sadakane, O;Sato, H
• 通讯作者: Sato, H

Contrast-dependent, contextual response modulation in primary visual cortex and lateral geniculate nucleus of cat.

猫的初级视觉皮层和外侧膝状核中的对比度依赖性、上下文反应调节。

• 发表时间: 2006
• 期刊: European Journal of Neuroscience 23
• 作者: Sadakane;O.;Ozeki;H.;Naito;T.;Akasaki;T.;Kasamatsu;T.;Sato;H.
• 通讯作者: H.

Similarity of direction tuning among responses to stimulation of different whiskers in rat barrel cortex

大鼠桶皮层不同胡须刺激反应方向调节的相似性

• 发表时间: 2005
• 期刊: Journal of Neurophysiology 94
• 作者: Kida;H.;Shimegi;S.;Sato;H.
• 通讯作者: H.