Related Experiment Videos
fMRI hippocampal activity during a virtual radial arm maze
Robert S Astur1, Sarah A St Germain, Elizabeth K Baker
1Olin Neuropsychiatry Research Center, Institute of Living, 200 Retreat Avenue, Hartford, Connecticut 06106, USA. Robert.astur@yale.edu
Applied Psychophysiology and Biofeedback
|September 17, 2005
Summary
This study found that the human hippocampus is involved in a virtual reality spatial memory task. This virtual radial arm maze may help assess hippocampal function and predict psychiatric disorders.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Human Neuroimaging
Background:
- The hippocampus is crucial for spatial memory, as evidenced by rodent studies using the radial arm maze.
- Assessing hippocampal function in humans is vital for understanding and predicting psychiatric disorders.
Purpose of the Study:
- To adapt the radial arm maze for human use in a virtual reality environment.
- To investigate hippocampal and frontal cortex activity during spatial memory tasks in healthy undergraduates.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to monitor brain activity.
- Thirteen healthy undergraduates completed a virtual reality radial arm maze task.
- Blood-oxygen-level-dependent (BOLD) signals were analyzed to assess brain activity.
Main Results:
- Bilateral hippocampal BOLD signal changes were observed during the virtual radial arm maze task.
- A paradoxical decrease in BOLD signal was noted during the spatial memory component.
- Frontal cortex activity indicated the engagement of working memory circuits.
Conclusions:
- The virtual reality radial arm maze effectively engages the human hippocampus, supporting its role in spatial memory.
- This task shows potential for assessing hippocampal integrity and predicting psychiatric disorder risk or severity.