Type of Featural Attention Differentially Modulates hMT+ Responses to Illusory Motion Aftereffects
Type of Featural Attention Differentially Modulates hMT+ Responses to Illusory Motion Aftereffects
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DOI：
10.1152/jn.90812.2008
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发表时间：
2009-11-01
影响因子：
2.5
通讯作者：
Goebel, Rainer
中科院分区：
文献类型：
--
作者：
Castelo-Branco, Miguel;Kozak, Lajos R.;Goebel, Rainer
[10]杨文军，李文军.特征性注意的类型不同地调节hMT（+）对错觉运动后效的反应。J Neurophysiol 102：3016-3025，2009.首次发表于2009年8月26日; doi：10.1152/jn.90812.2008。人类运动复合体（hMT（+）/V5）中的活动与运动的感知有关，无论是真实的表面运动还是运动的错觉，例如表观运动（AM）或运动后效（MAE）。hMT（+）中的错觉性运动相关激活是代表运动本身还是对运动的注意，这是一个长期存在的争论。我们已经问过，当唤醒的变化受到抑制，注意力集中在同时发生的运动和非运动特征时，hMT（+）对MAE的反应是否存在。当注意力集中在同时发生的空间角度或颜色特征时，在MAE期间观察到hMT（+）活性显著增强。这一观察结果证实了直接比较适应（MAE诱导）与非适应条件。相反，当受试者必须报告叠加AM的伴随速度变化时，这种影响会减弱。对于伴随的正交真实的运动（RM）也观察到了相同的发现，这表明对同时发生的虚幻或真实的运动的选择性注意干扰了hMT（+）中MAE信号的显著性。我们的结论是，MAE相关的变化，在全球活动的hMT（+）提供选择性注意力不集中在干扰功能，如并发运动。因此，在hMT（+）中存在一个真正的MAE相关运动信号，既不能用唤醒的变化来解释，也不能用选择性注意来解释。
Castelo-Branco M, Kozak LR, Formisano E, Teixeira J, Xavier J, Goebel R. Type of featural attention differentially modulates hMT(+) responses to illusory motion aftereffects. J Neurophysiol 102: 3016-3025, 2009. First published August 26, 2009; doi:10.1152/jn.90812.2008. Activity in the human motion complex (hMT(+)/V5) is related to the perception of motion, be it either real surface motion or an illusion of motion such as apparent motion (AM) or motion aftereffect (MAE). It is a long-lasting debate whether illusory motion-related activations in hMT(+) represent the motion itself or attention to it. We have asked whether hMT(+) responses to MAEs are present when shifts in arousal are suppressed and attention is focused on concurrent motion versus nonmotion features. Significant enhancement of hMT(+) activity was observed during MAEs when attention was focused either on concurrent spatial angle or color features. This observation was confirmed by direct comparison of adapting (MAE inducing) versus nonadapting conditions. In contrast, this effect was diminished when subjects had to report on concomitant speed changes of superimposed AM. The same finding was observed for concomitant orthogonal real motion (RM), suggesting that selective attention to concurrent illusory or real motion was interfering with the saliency of MAE signals in hMT(+). We conclude that MAE-related changes in the global activity of hMT(+) are present provided selective attention is not focused on an interfering feature such as concurrent motion. Accordingly, there is a genuine MAE-related motion signal in hMT(+) that is neither explained by shifts in arousal nor by selective attention.