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Updated: May 30, 2026
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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
Published on: December 8, 2023
Aberrant visual circuitry associated with normal spatial match-to-sample accuracy in schizophrenia.
Kathy Burton Avsar1, Luke Edward Stoeckel, Mark Steven Bolding
1Department of Psychiatry and Behavioral Neurobiology, The University of Alabama at Birmingham, Birmingham, AL 35294-0017, USA.
Psychiatry Research
|July 26, 2011
Summary
Schizophrenia patients show altered brain activity in visual and prefrontal regions during memory tasks, engaging diverse areas to compensate. This study used fMRI and a tailored visual match-to-sample task.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Psychiatry
Background:
- Schizophrenia (SZ) is a complex psychiatric disorder.
- Altered brain function in prefrontal cortex regions is implicated in SZ.
- Understanding these alterations is crucial for developing targeted treatments.
Purpose of the Study:
- To investigate the functional roles of the anterior cingulate cortex (ACC) and dorsolateral prefrontal cortex (DLPFC) in patients with schizophrenia.
- To compare brain activation patterns between medicated patients with SZ, their first-degree relatives, and healthy controls.
- To examine neural mechanisms underlying visual working memory in SZ.
Main Methods:
- Utilized a visual delayed match-to-sample task with individualized difficulty adjustment.
- Employed functional magnetic resonance imaging (fMRI) to measure brain activity.
- Analyzed brain activation during visual encoding, delay, and discrimination phases of the task.
Main Results:
- No significant differences in ACC/medial frontal cortex activation were observed between groups.
- Patients with SZ exhibited decreased activation in visual processing areas during encoding and discrimination.
- SZ group showed reduced activation in the ventrolateral prefrontal cortex during the delay phase.
Conclusions:
- Schizophrenia patients demonstrate distinct patterns of brain activation during a visual working memory task.
- Findings suggest SZ subjects may recruit alternative brain regions to solve perceptual memory problems.
- These results highlight the distributed neural network alterations in schizophrenia.
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