容易检测和识别生物运动(BM)的能力是生存和人际沟通的基础。然而,当BM倒置显示时,对BM的感知被强烈破坏。这种众所周知的反转效应被认为是由高度调谐到与重力兼容的运动线索的生命运动检测机制引起的。在目前的研究中,我们使用无报告瞳孔测量法评估了BM感知中的倒置效应。我们发现,与倒置的对应物(重力不相容)相比,当观察者观看直立的BM(重力相容)时,瞳孔大小显着扩大。重要的是,这种效应主要取决于动态的生物学特性,并可以扩展到当地的脚运动信号。这些发现表明,眼睛瞳孔可以发出依赖于重力的生命运动感知信号。更重要的是,在方便的情况下,客观性,和瞳孔测量的非侵入性,本研究为瞳孔反应在检测社会认知障碍患者生活运动知觉缺陷方面的潜在应用铺平了道路。
The ability to readily detect and recognize biological motion (BM) is fundamental to survival and interpersonal communication. However, perception of BM is strongly disrupted when it is shown upside down. This well-known inversion effect is proposed to be caused by a life motion detection mechanism highly tuned to
gravity-compatible motion cues. In the current study, we assessed the inversion effect in BM perception using a no-report pupillometry. We found that the pupil size was significantly enlarged when observers viewed upright BMs (
gravity-compatible) compared with the inverted counterparts (
gravity-incompatible). Importantly, such an effect critically depended on the dynamic biological characteristics, and could be extended to local feet motion signals. These findings demonstrate that the eye pupil can signal
gravity-dependent life motion perception. More importantly, with the convenience, objectivity, and noninvasiveness of pupillometry, the current study paves the way for the potential application of pupillary responses in detecting the deficiency of life motion perception in individuals with socio-cognitive disorders.