Auditory cues facilitate object movement processing in human extrastriate visual cortex during simulated self-motion: A pilot study.
Auditory cues facilitate object movement processing in human extrastriate visual cortex during simulated self-motion: A pilot study.
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DOI：
10.1016/j.brainres.2021.147489
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发表时间：
2021-08-15
期刊：
影响因子：
2.9
通讯作者：
Ahveninen J
中科院分区：
文献类型：
--
作者：
Vaina LM;Calabro FJ;Samal A;Rana KD;Mamashli F;Khan S;Hämäläinen M;Ahlfors SP;Ahveninen J
当观察者在空间中移动时，移动物体的视觉分离是一个相当大的计算挑战。最近的心理物理学研究表明，方向一致，移动的听觉线索可以大大提高解析对象的运动在这样的设置，但确切的大脑机制和视觉处理阶段，调解这些影响仍然不完全知道。在这里，我们利用多变量模式分析（MVPA）的MRI知情脑磁图（MEG）源估计，以研究如何跨模态听觉线索促进运动检测在观察员的自我运动。在MEG记录过程中，参与者确定了一个目标对象，该目标对象在一个视觉场景中向前或向后移动，该视觉场景包括9个相同纹理的对象，模拟向前的观察者平移。听觉运动提示1）提高了目标定位的行为准确性，2）显著调制了V2区和人类中颞叶复合体（hMT+）的MEG源活动，3）提高了使用MVPA从hMT+活动解码目标运动方向的准确性。解码准确性的增加，听觉线索在hMT+显着也时，上级时间激活或附近的听觉皮层回归的hMT+源活动控制点扩散引起的源估计偏差。综上所述，这些结果表明，解析物体运动从自我运动诱导的视皮层在人类纹外区的视觉流可以促进跨通道的影响，从听觉系统。
Visual segregation of moving objects is a considerable computational challenge when the observer moves through space. Recent psychophysical studies suggest that directionally congruent, moving auditory cues can substantially improve parsing object motion in such settings, but the exact brain mechanisms and visual processing stages that mediate these effects are still incompletely known. Here, we utilized multivariate pattern analyses (MVPA) of MRI-informed magnetoencephalography (MEG) source estimates to examine how crossmodal auditory cues facilitate motion detection during the observer’s self-motion. During MEG recordings, participants identified a target object that moved either forward or backward within a visual scene that included nine identically textured objects simulating forward observer translation. Auditory motion cues 1) improved the behavioral accuracy of target localization, 2) significantly modulated the MEG source activity in the areas V2 and human middle temporal complex (hMT+), and 3) increased the accuracy at which the target movement direction could be decoded from hMT+ activity using MVPA. The increase of decoding accuracy by auditory cues in hMT+ was significant also when superior temporal activations in or near auditory cortices were regressed out from the hMT+ source activity to control for source estimation biases caused by point spread. Taken together, these results suggest that parsing object motion from self-motion-induced optic flow in the human extrastriate visual cortex can be facilitated by crossmodal influences from auditory system.
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影响因子：
56.9
作者：
DICK, M;ULLMAN, S;SAGI, D
通讯作者：
SAGI, D
在正向自我运动过程中观察者检测对象运动的基础神经活动：方向皮层连通性的动态解码和时间演变。
影响因子：
6.7
作者：
Kozhemiako N;Nunes AS;Samal A;Rana KD;Calabro FJ;Hämäläinen MS;Khan S;Vaina LM
通讯作者：
Vaina LM
影响因子：
3.8
作者：
Chien SE;Ono F;Watanabe K
通讯作者：
Watanabe K
影响因子：
1.7
作者：
Barlow, H B
通讯作者：
Barlow, H B
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y