Key result
Schizophrenia links to smaller frontal oxyHb increases during verbal tasks, suggesting task-dependent functional hypofrontality.
Why the study?
Functional hypofrontality in schizophrenia patients has been reported by other imaging modalities, but its task dependency and measurement by near-infrared spectroscopy needed assessment.
Do schizophrenia patients have altered cerebral hemoglobin oxygenation responses during cognitive tasks compared to healthy subjects?
Population
62 schizophrenia patients and 31 healthy subjects
Comparison
Schizophrenia patients vs healthy subjects during verbal fluency and letter number span tests
Design
Case-control study using near-infrared spectroscopy
Authors
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No immediate clinical implications for schizophrenia; leaves open task-dependent hypofrontality as a potential biomarker.
Case-Control (n=93)
Do schizophrenia patients have altered cerebral hemoglobin oxygenation responses during cognitive tasks compared to healthy subjects?
Schizophrenia patients exhibit task-dependent functional hypofrontality during verbal fluency tests as measured by near-infrared spectroscopy.
Watanabe et al. (2004) conducted a case-control in Schizophrenia (n=93). Schizophrenia vs. Healthy subjects was evaluated on Cerebral hemoglobin oxygenation response (oxyHb) in the left frontal area during cognitive tasks. Schizophrenia patients exhibited a smaller increase in oxygenated hemoglobin during a verbal fluency test compared to healthy controls, suggesting task-dependent functional hypofrontality.
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