Data Sheet 1_Postural correlates of visual incentives: application to food and alcohol stimuli.pdf

IntroductionAlcohol consumption is a major public health concern, linked to numerous diseases, including neurological disorders. Building on research into the interaction between emotion and motor processes, posturography has proven useful for studying how socioaffective information influences body sway. Few studies have explored this under motivational conditions, with limited work on food or alcohol cues.
MethodsFifty-five healthy participants viewed visual stimuli in four conditions (neutral–alcohol, alcohol, neutral–food, food) while their postural responses were recorded. After the experiment, participants rated each stimulus on pleasantness, unpleasantness, consumption, approach, avoidance, and intensity.
ResultsSubjective ratings differed significantly between conditions. Postural variability and movement amplitude were modulated by both incentive type (food vs. alcohol) and valence (incentive vs. neutral). Notably, food cues increased postural movement, whereas alcohol cues decreased it.
DiscussionThese findings highlight distinct motor signatures for different appetitive cues and contribute to understanding how emotions and motivation shape embodied responses to environmental stimuli.

引言：饮酒是一项重大公共卫生议题，与包括神经系统疾病在内的多种疾病密切相关。基于情绪与运动过程交互作用的相关研究，姿势图（posturography）技术已被证实可有效用于探究社会情感信息对身体摇摆的影响机制。但目前鲜有研究在动机情境下开展此类探索，针对食物或酒精线索的相关研究尤为匮乏。
方法：本研究招募55名健康受试者，让其在四种视觉刺激条件（中性-酒精、酒精、中性-食物、食物）下观看刺激材料，同时记录其姿势反应。实验结束后，受试者需对每种刺激的愉悦度、不悦度、摄入意愿、趋近倾向、回避倾向及强度进行评分。
结果：不同实验条件下的主观评分存在显著差异。姿势变异性与运动幅度同时受到激励类型（食物vs.酒精）与效价（激励刺激vs.中性刺激）的调控。值得注意的是，食物线索会提升姿势运动幅度，而酒精线索则会降低该幅度。
讨论：本研究结果揭示了不同奖赏性线索所特有的运动特征，为理解情绪与动机如何塑造个体对环境刺激的具身化反应提供了新的实证支撑。