The Effects of Intragastric Administration of Nutrients on Executive Control in Healthy Subjects.

Inclusion Criteria:

• N = 26 These numbers are based on a power calculation for a repeated measures ANOVA with one within-subject factor using Gpower software version 3.1.7 (http://www.psycho.uni-duesseldorf.de/abteilungen/aap/gpower3), indicating that these sample sizes are needed to achieve 90% power to detect a medium-sized effect (f = 0.25).
• Men & women
• Age: >17 years
• 20 ≤ BMI ≤ 25
• Of good mental and physical health

Exclusion Criteria:

Participants with one or more of self-reported points below will be excluded:

1. History of, or current presence of:

   • Psychiatric disorders (e.g., anxiety disorders, somatization disorder, eating disorders, depression, substance-related disorders alcohol abuse or dependence etc.)
   • Abnormal eating behavior (including restraint and emotional eating)
   • Abdominal/thoracic surgery
   • Neurological, endocrine or digestive related disorders
   • Head trauma with loss of consciousness
   • Other serious medical conditions
   • Use of any drugs, including cannabis, during the past 6 months

2. Current presence of:

   • Pregnancy
   • Medication use that affects the function of the gastrointestinal tract and/or affects the nervous system, psychotropics or painkillers
   • A recent accident or surgery that has not fully recovered

3. Other

   • Smoking
   • Women not taking hormonal contraception