Dipartimento di Neuroscienze, Sezione di Fisiologia, Università di Parma Parma, Italy ; Dipartimento di Psicologia, University Milano Bicocca Milano, Italy.
IRCCS Neuromed Pozzilli, Italy ; Dipartimento di Scienze Mediche e Chirurgiche, Università "Magna Graecia" di Catanzaro Germaneto, Italy.
Front Hum Neurosci. 2014 Dec 4;8:968. doi: 10.3389/fnhum.2014.00968. eCollection 2014.
It is well known that the observation of graspable objects recruits the same motor representations involved in their actual manipulation. Recent evidence suggests that the presentation of nouns referring to graspable objects may exert similar effects. So far, however, it is not clear to what extent the modulation of the motor system during object observation overlaps with that related to noun processing. To address this issue, 2 behavioral experiments were carried out using a go-no go paradigm. Healthy participants were presented with photos and nouns of graspable and non-graspable natural objects. Also scrambled images and pseudowords obtained from the original stimuli were used. At a go-signal onset (150 ms after stimulus presentation) participants had to press a key when the stimulus referred to a real object, using their right (Experiment 1) or left (Experiment 2) hand, and refrain from responding when a scrambled image or a pseudoword was presented. Slower responses were found for both photos and nouns of graspable objects as compared to non-graspable objects, independent of the responding hand. These findings suggest that processing seen graspable objects and written nouns referring to graspable objects similarly modulates the motor system.
众所周知，对可抓握物体的观察会激活与实际操作相关的相同运动表征。最近的证据表明，提到可抓握物体的名词的呈现可能会产生类似的效果。然而，目前尚不清楚在多大程度上，物体观察过程中的运动系统的调制与与名词处理相关的调制重叠。为了解决这个问题，我们进行了两项行为实验，使用了go-no go 范式。健康参与者观看了可抓握和不可抓握的自然物体的照片和名词，以及从原始刺激中获得的混乱图像和伪词。在 go 信号（刺激呈现后 150 毫秒）出现时，参与者必须用右手（实验 1）或左手（实验 2）按下一个键，当刺激是真实物体时做出反应，当呈现混乱图像或伪词时则不要做出反应。与不可抓握的物体相比，参与者对可抓握物体的照片和名词的反应速度较慢，而与使用的手无关。这些发现表明，对可抓握物体的处理以及对提到可抓握物体的书面名词的处理，都会以类似的方式调节运动系统。
