Carli G, Cavallaro F I, Rendo C A, Santarcangelo Enrica L
Department of Physiology, University of Siena, Siena, Italy.
Exp Brain Res. 2007 May;179(2):147-54. doi: 10.1007/s00221-006-0776-0. Epub 2006 Nov 14.
Postural control in subjects with high (Highs) and low (Lows) susceptibility to hypnosis is differentially affected by changes in visual and neck tactile/proprioceptive input. The aim of the present experiment was to investigate whether imagery of the visual and tactile sensory modalities also induces different modulation of postural control in Highs and Lows. Fourteen Highs and 16 Lows were included in the study; they were recorded while standing upright with eyes closed during visual and tactile imagery tasks and during mental computation. Their posture and movement were recorded with an Elite System and their experience was assessed after each task in a structured interview. Visual imagery was judged "easier" than tactile imagery by Lows, while Highs performed both tasks easily and judged the tactile imagery less effortful and more vivid than Lows. No difference was observed for the mental computation. The Highs' body sway was not affected by the cognitive tasks, while Lows showed a task-related modulation of body sway. The results are in line with the hypothesis of lower vulnerability of Highs to the effects of tasks interfering with postural control and of different sensory-motor integration in Highs and Lows.
对催眠高度敏感（高敏感组）和低度敏感（低敏感组）的受试者的姿势控制，会受到视觉和颈部触觉/本体感觉输入变化的不同影响。本实验的目的是研究视觉和触觉感觉模态的意象是否也会在高敏感组和低敏感组中引起姿势控制的不同调节。该研究纳入了14名高敏感组受试者和16名低敏感组受试者；在视觉和触觉意象任务以及心算过程中，他们闭眼直立站立时被进行记录。使用Elite系统记录他们的姿势和动作，并在每项任务后通过结构化访谈评估他们的体验。低敏感组认为视觉意象比触觉意象“更容易”，而高敏感组轻松完成了两项任务，并认为触觉意象比低敏感组更省力、更生动。在心算方面未观察到差异。高敏感组的身体摆动不受认知任务的影响，而低敏感组则表现出与任务相关的身体摆动调节。结果符合以下假设：高敏感组对干扰姿势控制的任务影响的易感性较低，且高敏感组和低敏感组存在不同的感觉运动整合。
