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Diet-Induced Weight Loss Alters Functional Brain Responses during an Episodic Memory Task
Carl-Johan Boraxbekk1, Andreas Stomby, Mats Ryberg
1Center for Demographic and Aging Research, Umex00E5; University, Umex00E5;, Sweden.
Obesity Facts
|July 4, 2015
Summary
Diet-induced weight loss significantly improved episodic memory and brain function in overweight women. This enhancement was linked to reduced free fatty acids and increased hippocampal activity.
Area of Science:
- Neuroscience
- Nutrition Science
- Medical Research
Background:
- Overweight and obesity are linked to cognitive decline.
- Dietary interventions may offer a strategy to mitigate these effects.
Purpose of the Study:
- To determine if weight loss through diet improves episodic memory.
- To investigate changes in brain activity associated with memory in overweight women following dietary interventions.
Main Methods:
- 20 overweight postmenopausal women were randomized to a modified paleolithic or standard Nordic diet for 6 months.
- Functional magnetic resonance imaging (fMRI) assessed brain activity during an episodic memory task.
- Anthropometric and biochemical data were collected before and after interventions.
Main Results:
- Episodic memory performance significantly improved post-intervention (p = 0.010).
- Increased brain activity was observed in the right hippocampus during memory encoding, associated with decreased plasma free fatty acids (FFA).
- Correlations were found between pre-frontal cortex activity increases and waist circumference reduction.
Conclusions:
- Diet-induced weight loss improves episodic memory.
- Weight loss is associated with beneficial changes in hippocampal activity and reduced plasma FFA.
- Dietary interventions show promise for enhancing cognitive function in overweight individuals.
