Eating Behavior Clinical Trial
Official title:
Effect of Consumption on Cognitive Processes
To get a better understanding of the interaction between metabolism, neural responses, cognitive processes and appetite the investigaters will examine the effect of food consumption on cognitive processes. The investigaters will look at the effect of satiation on cognitive performance on both a behavioural and neuronal level. In this study participants will undergo functional magnetic resonance imaging (fMRI) measurements while performing a food reward and inhibition task, and in addition perform a memory, working memory and delay discount task, once when hungry and once when full.
Human eating behaviour is a very complex process. It has been well established that food
intake and choice are influences by nutritional composition of the food and their reward
values. However recent work suggests that cognitive processes such as memory, attention, and
inhibition influence food choices. Thinking about food can lead to increased attention to
food cues, which can result in a greater chance of actual food consumption. Additional
manipulation of attention effects memory and snack intake. It has been suggested that memory
inhibition plays a critical role in suppression of food-related information when satiated to
prevent overeating. These results underpin the interaction between cognitive processes and
internal state and its effect on appetite. Although it has been widely studied what the
effect of satiation is on reward and even which brain regions are associated with food
intake, for both homeostatic and hedonic eating, the direct effect of consumption on
cognitive processes and the related brain processes are rather unknown.
In this study participants will be asked to come to a research facility twice
(within-design). Once the particpant will undergo all the tasks when hungry and receive a
lunch at the end of the study-day (hungry session), and once the subject will first receive a
lunch and then perform all the tasks (satiated session). Upon arrival subjects will fill in
their appetite and mood ratings, followed by a break or a lunch (depending on the session).
After the 25-min break/lunch the subject will be placed in the scanner. First the particpants
neural responses will be measure while performing an inhibition task, here subjects will
complete a go-no/go task; the particpant either has to go (press) when seeing a toiletry or
stationary item, or not go (withhold pressing) when seeing a food or sports item. Second a
resting state fMRI measurement will be performed. Third subjects will see food and non-food
items, which the particpant has to rate on their appeal. Last an anatomical scan will be run.
When out of the scanner subjects will undergo several cognitive computerized tasks, a word
recall task, a working memory task (measuring the top-down guidance of attention to food
stimuli via working memory) and a delay discount task. At last subjects will get lunch (when
receiving a break at the start) or a break (when consuming food at arrival).
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