کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6025226 | 1580894 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Brain dynamics of meal size selection in humans
ترجمه فارسی عنوان
پویایی مغز از انتخاب اندازه غذا در انسان
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کلمات کلیدی
MTGGFPSPLStgIPLINSVEPsMFGIOGPortion size - اندازه قسمتFood image - تصویر غذاfunctional magnetic resonance imaging - تصویرسازی تشدید مغناطیسی کارکردیfMRI - تصویرسازی تشدید مغناطیسی کارکردیinsula - جزیرهsuperior temporal gyrus - جورج جادویی عالیSatiety - خوشبختیInferior occipital gyrus - قارچ گوشه پایینGlobal field power - قدرت جهانی میدانLAURA - لاوراInferior parietal lobe - لوب ترموال پایینSuperior parietal lobule - لوبول ارگانیک برترEEG - نوار مغزیMeal - وعده غذاییVisual evoked potentials - ویژوال تحریک پتانسیلmiddle temporal gyrus - گریش زمان متوسطcingulate gyrus - گودرزیmiddle frontal gyrus - گوریور پیشانی متوسط
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب شناختی
چکیده انگلیسی
Although neuroimaging research has evidenced specific responses to visual food stimuli based on their nutritional quality (e.g., energy density, fat content), brain processes underlying portion size selection remain largely unexplored. We identified spatio-temporal brain dynamics in response to meal images varying in portion size during a task of ideal portion selection for prospective lunch intake and expected satiety. Brain responses to meal portions judged by the participants as 'too small', 'ideal' and 'too big' were measured by means of electro-encephalographic (EEG) recordings in 21 normal-weight women. During an early stage of meal viewing (105-145Â ms), data showed an incremental increase of the head-surface global electric field strength (quantified via global field power; GFP) as portion judgments ranged from 'too small' to 'too big'. Estimations of neural source activity revealed that brain regions underlying this effect were located in the insula, middle frontal gyrus and middle temporal gyrus, and are similar to those reported in previous studies investigating responses to changes in food nutritional content. In contrast, during a later stage (230-270Â ms), GFP was maximal for the 'ideal' relative to the 'non-ideal' portion sizes. Greater neural source activity to 'ideal' vs. 'non-ideal' portion sizes was observed in the inferior parietal lobule, superior temporal gyrus and mid-posterior cingulate gyrus. Collectively, our results provide evidence that several brain regions involved in attention and adaptive behavior track 'ideal' meal portion sizes as early as 230Â ms during visual encounter. That is, responses do not show an increase paralleling the amount of food viewed (and, in extension, the amount of reward), but are shaped by regulatory mechanisms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NeuroImage - Volume 113, June 2015, Pages 133-142
Journal: NeuroImage - Volume 113, June 2015, Pages 133-142
نویسندگان
Ulrike Toepel, Marie-Laure Bielser, Ciaran Forde, Nathalie Martin, Alexandre Voirin, Johannes le Coutre, Micah M. Murray, Julie Hudry,