Academic stress and personality interact to increase the neural response to high-calorie food cues

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2017
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Neseliler, Selin
Tannenbaum, Beth
Zacchia, Maria
Larcher, Kevin
Coulter, Kirsty
Lamarche, Marie
Marliss, Errol B
Dagher, Alain
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Appetite. 2017, 116, pp. 306-314. ISSN 0195-6663. eISSN 1095-8304. Available under: doi: 10.1016/j.appet.2017.05.016
Zusammenfassung

Psychosocial stress is associated with an increased intake of palatable foods and weight gain in stress-reactive individuals. Personality traits have been shown to predict stress-reactivity. However, it is not known if personality traits influence brain activity in regions implicated in appetite control during psychosocial stress. The current study assessed whether Gray's Behavioural Inhibition System (BIS) scale, a measure of stress-reactivity, was related to the activity of brain regions implicated in appetite control during a stressful period. Twenty-two undergraduate students participated in a functional magnetic resonance imaging (fMRI) experiment once during a non-exam period and once during final exams in a counter-balanced order. In the scanner, they viewed food and scenery pictures. In the exam compared with the non-exam condition, BIS scores related to increased perceived stress and correlated with increased blood-oxygen-level dependent (BOLD) response to high-calorie food images in regions implicated in food reward and subjective value, such as the ventromedial prefrontal cortex, (vmPFC) and the amygdala. BIS scores negatively related to the functional connectivity between the vmPFC and the dorsolateral prefrontal cortex. The results demonstrate that the BIS trait influences stress reactivity. This is observed both as an increased activity in brain regions implicated in computing the value of food cues and decreased connectivity of these regions to prefrontal regions implicated in self-control. This suggests that the effects of real life stress on appetitive brain function and self-control is modulated by a personality trait. This may help to explain why stressful periods can lead to overeating in vulnerable individuals.

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Fachgebiet (DDC)
150 Psychologie
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Psychosocial stress; Food cue reactivity;Obesity; Neuroimaging; Personality
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ISO 690NESELILER, Selin, Beth TANNENBAUM, Maria ZACCHIA, Kevin LARCHER, Kirsty COULTER, Marie LAMARCHE, Errol B MARLISS, Jens C. PRUESSNER, Alain DAGHER, 2017. Academic stress and personality interact to increase the neural response to high-calorie food cues. In: Appetite. 2017, 116, pp. 306-314. ISSN 0195-6663. eISSN 1095-8304. Available under: doi: 10.1016/j.appet.2017.05.016
BibTex
@article{Neseliler2017-09-01Acade-41080,
  year={2017},
  doi={10.1016/j.appet.2017.05.016},
  title={Academic stress and personality interact to increase the neural response to high-calorie food cues},
  volume={116},
  issn={0195-6663},
  journal={Appetite},
  pages={306--314},
  author={Neseliler, Selin and Tannenbaum, Beth and Zacchia, Maria and Larcher, Kevin and Coulter, Kirsty and Lamarche, Marie and Marliss, Errol B and Pruessner, Jens C. and Dagher, Alain}
}
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