An egocentric straight-ahead bias in primate's vision.

An egocentric straight-ahead bias in primate's vision.
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DOI:
10.1007/s00429-021-02314-8
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发表时间:
2021-12
影响因子:
3.1
通讯作者:
Durand JB
Durand JB
中科院分区:
医学3区
文献类型:
--
作者:
Cottereau BR;Trotter Y;Durand JB

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当我们打算接触或操纵物体时,我们通常会调整身体的方向,使其面向物体。占用相同空间的其他物体可能会对预期的操作构成潜在障碍。因此,无论是作为目标还是作为障碍,位于我们正前方的物体往往被赋予了特殊的行为地位。在这里,我们回顾了一组最近的电生理、成像和行为研究,这些研究汇集了证据,表明正前方的物体受到特权视觉处理的影响。更准确地说,这些研究共同表明,当凝视使中央视觉偏离正前方方向时,后者仍然优先于周边视觉。直直的物体引起(1)猕猴周围V1神经元更强的神经元反应,(2)人类视觉皮层更强的脑电图和功能磁共振成像激活,(3)更快的反应性手和眼运动。在这里,我们讨论了这一现象背后的功能含义和潜在机制。值得注意的是,我们提出它可以被认为是一种新的视觉空间注意机制,不同于先前记录的内源性和外源性注意类别。
As we plan to reach or manipulate objects, we generally orient our body so as to face them. Other objects occupying the same portion of space will likely represent potential obstacles for the intended action. Thus, either as targets or as obstacles, the objects located straight in front of us are often endowed with a special behavioral status. Here, we review a set of recent electrophysiological, imaging and behavioral studies bringing converging evidence that the objects which lie straight-ahead are subject to privileged visual processing. More precisely, these works collectively demonstrate that when gaze steers central vision away from the straight-ahead direction, the latter is still prioritized in peripheral vision. Straight-ahead objects evoke (1) stronger neuronal responses in macaque peripheral V1 neurons, (2) stronger EEG and fMRI activations across the human visual cortex and (3) faster reactive hand and eye movements. Here, we discuss the functional implications and underlying mechanisms behind this phenomenon. Notably, we propose that it can be considered as a new type of visuospatial attentional mechanism, distinct from the previously documented classes of endogenous and exogenous attention.
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