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首页> 外文期刊>Experimental Brain Research >Visuotactile interaction even in far sagittal space in older adults with decreased gait and balance functions
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Visuotactile interaction even in far sagittal space in older adults with decreased gait and balance functions

机译：即使在老年人的较远的成年人中，溃疡触觉相互作用也有降低的步态和平衡函数

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摘要

Spatial proximity of signals from different sensory modalities is known to be a crucial factor in facilitating efficient multisensory processing in young adults. However, recent studies have demonstrated that older adults exhibit strong visuotactile interactions even when the visual stimuli were presented in a spatially disparate position from a tactile stimulus. This suggests that visuotactile peripersonal space differs between older and younger adults. In the present study, we investigated to what extent peripersonal space expands in the sagittal direction and whether this expansion was linked to the decline in sensorimotor functions in older adults. Vibrotactile stimuli were delivered either to the left or right index finger, while visual stimuli were presented at a distance of 5 cm (near), 37.5 cm (middle), or 70 cm (far) from each finger. The participants had to respond rapidly to a randomized sequence of unimodal (visual or tactile) and simultaneous visuotactile targets (i.e., a redundant target paradigm). Sensorimotor functions were independently assessed by the Timed Up and Go (TUG) and postural stability tests. Results showed that reaction times to the visuotactile bimodal stimuli were significantly faster than those to the unimodal stimuli, irrespective of age group [younger adults: 22.0 +/- A 0.6 years, older adults: 75.0 +/- A 3.3 years (mean +/- A SD)] and target distance. Of importance, a race model analysis revealed that the co-activation model (i.e., visuotactile multisensory integrative process) is supported in the far condition especially for older adults with relatively poor performance on the TUG or postural stability tests. These results suggest that aging can change visuotactile peripersonal space and that it may be closely linked to declines in sensorimotor functions related to gait and balance in older adults.
机译：已知来自不同感官模型的信号的空间接近是促进年轻成年人有效的多思科加工的关键因素。然而，最近的研究表明，即使在从触觉刺激的空间不同的位置呈现视觉刺激时，老年人也表现出强大的粘合性相互作用。这表明visuotactile横周性空间与年龄和较年轻的成年人之间的不同。在本研究中，我们调查了脉搏方向在展望方向上扩展的程度，以及这种扩展是否与老年人的传感器功能的下降相关联。 vibrotastive刺激以左侧或右食指递送，而可视刺激以5cm（接近），37.5cm（中间），或从每个手指的70cm（远）的距离呈现。参与者必须迅速响应单峰（视觉或触觉）和同时粘合靶标的随机化序列（即，冗余目标范式）。 SensorImotor功能由超时和去（拖船）和姿势稳定性测试独立评估。结果表明，无论年龄组[较年轻的成人：22.0 +/- 0.6岁，老年人：75.0 +/- 3.3年（平均+ / - 一个SD）和目标距离。重要性，赛跑模型分析显示，共激活模型（即，visuotactive多福音型综合整合过程）在远处条件下支持，特别是对于拖船或姿势稳定性测试的性能相对较差的老年人。这些结果表明，老化可以改变粘面膜脉搏空间，并且可以密切相关，以与老年人的步态和平衡有关的感觉电流功能下降。

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