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Investigating virtual reality navigation in amnestic mild cognitive impairment using fMRI
E M Migo1, O O'Daly1, M Mitterschiffthaler1,2
1a King's College London, Institute of Psychiatry , Psychology and Neuroscience , London , UK.
Summary
Amnestic Mild Cognitive Impairment (aMCI) patients show altered brain activity during spatial navigation tasks, suggesting potential for fMRI to track disease progression.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Medical Imaging
Background:
- Spatial navigation relies on a network including the hippocampus, crucial for memory.
- Amnestic Mild Cognitive Impairment (aMCI) involves memory deficits and is a risk factor for dementia.
- aMCI is linked to hippocampal atrophy and subtle spatial navigation impairments.
Purpose of the Study:
- To investigate brain activity during spatial navigation in aMCI patients using fMRI.
- To assess the utility of fMRI spatial navigation tasks for staging MCI progression.
Main Methods:
- Utilized a functional Magnetic Resonance Imaging (fMRI) spatial navigation task.
- Employed a virtual reality Radial Arm Maze analog.
- Compared brain activity between aMCI patients and healthy controls.
Main Results:
- aMCI patients exhibited reduced bilateral hippocampal, retrosplenial cortex, and left dorsolateral prefrontal cortex activity.
- Task performance was relatively normal despite reduced activation in key navigation areas.
- Increased right dorsolateral prefrontal cortex activity was observed in aMCI patients, potentially indicating compensation.
Conclusions:
- fMRI spatial navigation tasks reveal distinct neural patterns in aMCI.
- These tasks may serve as valuable tools for monitoring MCI progression.
- Compensatory mechanisms may be active in aMCI during navigation tasks.
