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首页> 外文期刊>Journal of Neurophysiology >Eating interrupted: The effect of intent on hand-to-mouth actions
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Eating interrupted: The effect of intent on hand-to-mouth actions

机译：进食中断：意图对口对口动作的影响

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Evidence from recent neurophysiological studies on nonhuman primates as well as from human behavioral studies suggests that actions with similar kinematic requirements but different end-state goals are supported by separate neural networks. It is unknown whether these different networks supporting seemingly similar reach-to-grasp actions are lateralized, or if they are equally represented in both hemispheres. Recently published behavioral evidence suggests certain networks are lateralized to the left hemisphere. Specifically, when participants used their right hand, their maximum grip aperture (MGA) was smaller when grasping to eat food items than when grasping to place the same items. Left-handed movements showed no difference between tasks. The present study investigates whether the differences between grasp-to-eat and grasp-to-place actions are driven by an intent to eat, or if placing an item into the mouth (sans ingestion) is sufficient to produce asymmetries. Twelve right-handed adults were asked to reach to grasp food items to 1) eat them, 2) place them in a bib, or 3) place them between their lips and then toss them into a nearby receptacle. Participants performed each task with large and small food items, using both their dominant and nondominant hands. The current study replicated the previous finding of smaller MGAs for the eat condition during right-handed but not left-handed grasps. MGAs in the eat and spit conditions did not significantly differ from each other, suggesting that eating and bringing a food item to the mouth both utilize similar motor plans, likely originating within the same neural network. Results are discussed in relation to neurophysiology and development.
机译：最近有关非人类灵长类动物的神经生理学研究以及人类行为研究的证据表明，具有类似运动学要求但最终目标不同的行动受单独的神经网络支持。尚不清楚这些支持看似抓握行为的不同网络是否被横向化，或者是否在两个半球中均等地代表了它们。最近发布的行为证据表明，某些网络偏向左半球。具体而言，当参与者用右手时，抓握吃食物时的最大握持孔（MGA）小于抓握放置相同物品时的最大握持孔。左撇子动作显示任务之间没有差异。本研究调查吃到吃和到放置到抓握动作之间的差异是由进食意图驱动的，还是将物品放入口中（无食味）是否足以产生不对称性。要求十二位惯用右手的成年人伸手抓住食物，以进行以下操作：1）吃掉它们，2）将它们放在围嘴中，或3）将它们放在嘴唇之间，然后扔到附近的容器中。参与者用他们的主导手和非主导手来执行大小食品的每项任务。当前的研究重复了先前发现的右手握法而不是左手握法在饮食条件下较小的MGA的发现。进食和吐痰条件下的MGA之间没有显着差异，这表明进食和将食物带入嘴中都利用了相似的运动计划，这很可能源自同一神经网络。讨论了有关神经生理学和发育的结果。

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