A head view-invariant representation of gaze direction in anterior superior temporal sulcus.

A head view-invariant representation of gaze direction in anterior superior temporal sulcus.
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DOI:
10.1016/j.cub.2011.09.025
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发表时间:
2011-11-08
期刊:
Current biology : CB
影响因子:
--
通讯作者:
Rowe JB
Rowe JB
中科院分区:
其他
文献类型:
--
作者:
Carlin JD;Calder AJ;Kriegeskorte N;Nili H;Rowe JB

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人类表现出一种非凡的辨别他人凝视方向的能力,即使一个给定的方向可以通过许多身体上不同的眼睛位置和头部视图来传达。例如,眼神交流可以通过左转的头向右瞥一眼或直视前方的头来发出信号。这种敏锐的凝视辨别意味着相当大的感知不变性。先前的人类研究发现,颞上沟(STS)优先对凝视的变化做出反应,但支持这种一般反应的潜在表征仍然知之甚少。利用人类功能磁共振成像(fMRI)数据的多变量模式分析(MVPA),我们测试了STS是否包含凝视方向的高阶头部视图不变代码。结果显示,右前侧STS有一个精细分级的凝视方向编码,该编码不受头部视图和物理图像特征的影响。进一步的分析显示,左前侧STS和楔前叶的凝视效果相似。我们的研究结果表明,无论信息是如何传达的,前侧STS都会对另一个人的注意力方向进行编码,并展示了高级面部区域如何通过对其他面部特征的不变性来进行细粒度的、感知相关的区分。上颞沟(STS)编码感知凝视方向的反应模式►凝视编码与前侧STS的头部视图和身体图像特征是不变的►然而,这些与社会无关的特征确实会影响后侧STS的凝视编码►前侧STS代表其他人出席的位置,无论这是如何传达的
Humans show a remarkable ability to discriminate others' gaze direction, even though a given direction can be conveyed by many physically dissimilar configurations of different eye positions and head views. For example, eye contact can be signaled by a rightward glance in a left-turned head or by direct gaze in a front-facing head. Such acute gaze discrimination implies considerable perceptual invariance. Previous human research found that superior temporal sulcus (STS) responds preferentially to gaze shifts, but the underlying representation that supports such general responsiveness remains poorly understood. Using multivariate pattern analysis (MVPA) of human functional magnetic resonance imaging (fMRI) data, we tested whether STS contains a higher-order, head view-invariant code for gaze direction. The results revealed a finely graded gaze direction code in right anterior STS that was invariant to head view and physical image features. Further analyses revealed similar gaze effects in left anterior STS and precuneus. Our results suggest that anterior STS codes the direction of another's attention regardless of how this information is conveyed and demonstrate how high-level face areas carry out fine-grained, perceptually relevant discrimination through invariance to other face features. ► Response patterns in superior temporal sulcus (STS) code perceived gaze direction ► Gaze codes are invariant to head view and physical image features in anterior STS ► However, such socially irrelevant features do influence gaze codes in posterior STS ► Anterior STS represents where others attend, regardless of how this is conveyed
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