Instruction-induced modulation of the visual stream during gesture observation

IF 2 3区心理学 Q3 BEHAVIORAL SCIENCES Neuropsychologia Pub Date : 2025-01-21 DOI:10.1016/j.neuropsychologia.2025.109078

Barbara Tomasino , Cinzia Canderan , Raffaella I. Rumiati

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Abstract

Although gesture observation tasks are believed to invariably activate the action-observation network (AON), we investigated whether the activation of different cognitive mechanisms when processing identical stimuli with different explicit instructions modulates AON activations. Accordingly, 24 healthy right-handed individuals observed gestures and they processed both the actor's moved hand (hand laterality judgment task, HT) and the meaning of the actor's gesture (meaning task, MT). The main brain-level result was that the HT (vs MT) differentially activated the left and right precuneus, the left inferior parietal lobe, the left and right superior parietal lobe, the middle frontal gyri bilaterally and the left precentral gyrus. MT (vs HT) differentially activated the left and right calcarine cortex, the fusiform gyrus bilaterally, the left inferior temporal gyrus, the left and right hippocampus and parahippocampal gyri, and the temporal pole bilaterally. Processing the actor's moving hand modulates the dorsal action observation network (while processing gesture meaning modulates the ventral object recognition stream). The present results suggest instruction-induced modulation on the visual stream during gesture observation.

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手势观察中视觉流的指令诱导调制。

虽然手势观察任务被认为总是激活动作观察网络（AON），但我们研究了在处理具有不同外显指令的相同刺激时，不同认知机制的激活是否会调节AON的激活。因此，24名健康的右撇子观察手势，他们同时处理演员移动的手（手侧性判断任务，HT）和演员手势的意义（意义任务，MT）。脑水平的主要结果是HT（与MT）对左右楔前叶、左下顶叶、左右上顶叶、额叶中回和左中央前回的不同激活。MT（与HT）对双侧左、右脑胼胝体皮层、梭状回、左颞下回、左右海马和海马旁回、颞极有不同的激活作用。处理演员移动的手调节背侧动作观察网络（而处理手势含义调节腹侧物体识别流）。目前的研究结果表明，在手势观察过程中，指令诱导的视觉流调制。

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来源期刊

Neuropsychologia 医学-行为科学

CiteScore

5.10

自引率

3.80%

发文量

228

审稿时长

4 months

期刊介绍： Neuropsychologia is an international interdisciplinary journal devoted to experimental and theoretical contributions that advance understanding of human cognition and behavior from a neuroscience perspective. The journal will consider for publication studies that link brain function with cognitive processes, including attention and awareness, action and motor control, executive functions and cognitive control, memory, language, and emotion and social cognition.