Division of Neuropsychology, Centre of Neurology, Hertie-Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany.
Department of Psychology, University of South Carolina, Columbia, South Carolina, United States of America.
PLoS One. 2020 May 29;15(5):e0233160. doi: 10.1371/journal.pone.0233160. eCollection 2020.
To determine own upright body orientation the brain creates a sense of verticality by a combination of multisensory inputs. To test whether this process is affected by aging, we placed younger and older adults on a motion platform and systematically tilted the orientation of their visual surroundings by using an augmented reality setup. In a series of trials, participants adjusted the orientation of the platform until they perceived themselves to be upright. Tilting the visual scene around the roll axis induced a bias in subjective postural vertical determination in the direction of scene tilt in both groups. In the group of older participants, however, the observed peak bias was larger and occurred at larger visual tilt angles. This indicates that the susceptibility to visually induced biases increases with age, possibly caused by a reduced reliability of sensory information.
为了确定自身的垂直方向，大脑通过多感官输入的组合来产生垂直感。为了测试这个过程是否受到年龄的影响，我们让年轻和年长的成年人站在运动平台上，并通过增强现实设置系统地倾斜他们周围视觉环境的方向。在一系列试验中，参与者调整平台的方向，直到他们感觉到自己是垂直的。在两组中，倾斜视觉场景的滚转轴会导致主观姿势垂直判断的偏差朝着场景倾斜的方向。然而，在年长参与者的组中，观察到的峰值偏差更大，并且发生在更大的视觉倾斜角度。这表明，对视觉诱导偏差的敏感性会随着年龄的增长而增加，这可能是由于感官信息的可靠性降低所致。
