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| 100 | 1 | _ | |a Kohl, Simon H. |0 P:(DE-Juel1)173070 |b 0 |u fzj |
| 245 | _ | _ | |a Real-time fMRI neurofeedback training to improve eating behavior by self-regulation of the dorsolateral prefrontal cortex: A randomized controlled trial in overweight and obese subjects |
| 260 | _ | _ | |a Orlando, Fla. |c 2019 |b Academic Press |
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| 520 | _ | _ | |a Obesity is associated with altered responses to food stimuli in prefrontal brain networks that mediate inhibitory control of ingestive behavior. In particular, activity of the dorsolateral prefrontal cortex (dlPFC) is reduced in obese compared to normal-weight subjects and has been linked to the success of weight-loss dietary interventions. In a randomized controlled trial in overweight/obese subjects, we investigated the effect on eating behavior of volitional up-regulation of dlPFC activity via real-time functional magnetic resonance imaging (fMRI) neurofeedback training.Thirty-eight overweight or obese subjects (BMI 25–40 kg/m2) took part in fMRI neurofeedback training with the aim of increasing activity of the left dlPFC (dlPFC group; n = 17) or of the visual cortex (VC/control group; n = 21). Participants were blinded to group assignment. The training session took place on a single day and included three training runs of six trials of up-regulation and passive viewing. Food appraisal and snack intake were assessed at screening, after training, and in a follow-up session four weeks later.Participants of both groups succeeded in up-regulating activity of the targeted brain area. However, participants of the control group also showed increased left dlPFC activity during up-regulation. Functional connectivity between dlPFC and ventromedial PFC, an area that processes food value, was generally increased during up-regulation compared to passive viewing. At follow-up compared to baseline, both groups rated pictures of high-, but not low-calorie foods as less palatable and chose them less frequently. Actual snack intake remained unchanged but palatability and choice ratings for chocolate cookies decreased after training.We demonstrate that one session of fMRI neurofeedback training enables individuals with increased body weight to up-regulate activity of the left dlPFC. Behavioral effects were observed in both groups, which might have been due to dlPFC co-activation in the control group and, in addition, unspecific training effects. Improved dlPFC-vmPFC functional connectivity furthermore suggested enhanced food intake-related control mechanisms. Neurofeedback training might support therapeutic strategies aiming at improved self-control in obesity, although the respective contributions of area-specific mechanisms and general regulation effects are in need of further investigation. |
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| 700 | 1 | _ | |a Preissl, Hubert |0 P:(DE-HGF)0 |b 7 |e Corresponding author |
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| 773 | _ | _ | |a 10.1016/j.neuroimage.2019.02.033 |g p. S1053811919301272 |0 PERI:(DE-600)1471418-8 |p 596-609 |t NeuroImage |v 191 |y 2019 |x 1053-8119 |
| 856 | 4 | _ | |y Published on 2019-02-21. Available in OpenAccess from 2020-02-21. |u https://juser.fz-juelich.de/record/861154/files/Kohl_2019_Post%20Print_NeuroImage_Real_time%20fMRI%20neurofeedback%20training%20to%20improve%20eating%20behavior.pdf |
| 856 | 4 | _ | |y Published on 2019-02-21. Available in OpenAccess from 2020-02-21. |x pdfa |u https://juser.fz-juelich.de/record/861154/files/Kohl_2019_Post%20Print_NeuroImage_Real_time%20fMRI%20neurofeedback%20training%20to%20improve%20eating%20behavior.pdf?subformat=pdfa |
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