کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
944798 1475594 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Eating tools in hand activate the brain systems for eating action: A transcranial magnetic stimulation study
ترجمه فارسی عنوان
ابزارهای خوردن در دست سیستم های مغز را برای خوردن فعال می کنند: مطالعات تحریک مغناطیسی مغزی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
چکیده انگلیسی

●The neuromuscular mechanism for human eating action is poorly understood.●We measured motor evoked potentials (MEPs) of the masseter muscles.●Participants viewed food and non-food visual stimuli while holding tools in hand.●Eating tools systematically enhanced the MEPs more greatly than other tools.●Eating tools thus exert a category-specific impact on the neural system for eating.

There is increasing neuroimaging evidence suggesting that visually presented tools automatically activate the human sensorimotor system coding learned motor actions relevant to the visual stimuli. Such crossmodal activation may reflect a general functional property of the human motor memory and thus can be operating in other, non-limb effector organs, such as the orofacial system involved in eating. In the present study, we predicted that somatosensory signals produced by eating tools in hand covertly activate the neuromuscular systems involved in eating action. In Experiments 1 and 2, we measured motor evoked response (MEP) of the masseter muscle in normal humans to examine the possible impact of tools in hand (chopsticks and scissors) on the neuromuscular systems during the observation of food stimuli. We found that eating tools (chopsticks) enhanced the masseter MEPs more greatly than other tools (scissors) during the visual recognition of food, although this covert change in motor excitability was not detectable at the behavioral level. In Experiment 3, we further observed that chopsticks overall increased MEPs more greatly than scissors and this tool-driven increase of MEPs was greater when participants viewed food stimuli than when they viewed non-food stimuli. A joint analysis of the three experiments confirmed a significant impact of eating tools on the masseter MEPs during food recognition. Taken together, these results suggest that eating tools in hand exert a category-specific impact on the neuromuscular system for eating.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neuropsychologia - Volume 59, July 2014, Pages 142–147
نویسندگان
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