Satiety Effects on the Neural Valuation of Food

Functional Magnetic Resonance Imaging Study of the Valuation of Food as a Function of Satiety

Using fMRI, this study will explore the neural correlates of satiety when individuals make decisions about food. The investigators will also examine individual differences in satiety effects.

Inclusion Criteria:

• Chinese ethnicity
• 21 to 45 years old
• English as first language
• Right-handed
• Have normal eyesight, or have long-sightedness or myopia within +8.0 to -8.0 diopters (unless corrected by contact lenses)
• Weigh less than 100kg with an abdominal circumference of less than 120cm
• Non-smoker, or only smoke occasionally (less than 5 sticks a week)
• Consume less than 2 units (200 mg) of caffeine a day
• Consume less than 21 units of alcohol per week (e.g. 500ml 5% beer = 2.5 units, 250ml 14% wine = 3.5 unit)
• Habitually sleep before 1am and wake before 9am

Exclusion Criteria:

• On a restrictive diet (e.g., vegetarian/vegan diet)
• History of food allergies
• History of psychiatric or neurological disorders
• History of chronic medical illness
• Metal implants in or on the body (e.g. braces, dental retainers, pacemakers)
• Shift worker
• Claustrophobic
• High astigmatism (high = >2.00 diopters)
• Colour-blind