Correlations between neuropsychological test results and P300 latency during silent-count and button-press tasks in post-traumatic brain injury patients. |
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Authors: | Faruque Reza Katsunori Ikoma Takayo Chuma Yukio Mano |
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Institution: | Department of Rehabilitation Medicine, Hokkaido University Graduate School of Medicine, N15 W7, Sapporo 060-8638, Japan. |
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Abstract: | To evaluate the correlations between memory function and intelligence and event-related potential, the P300 component for different tasks was studied for 30 post-traumatic brain injury patients (mean age 31.6 +/- 13.7 years; 23 male and 7 female). Memory function, intelligence, and depression were measured by using the Mini-Mental State Examination, the revised Wechsler Adult Intelligence Scale and the Self-Rating Depression Scale, respectively. P300 latency was measured during silent-count and button-press tests at three midline scalp (Fz, Cz, and Pz) sites for all subjects by using an auditory 'odd-ball' paradigm. Neuropsychological memory score was predicted by intelligence score, but neurophysiological P300 latency was predicted by memory score for the silent-count test and by intelligence score for the button-press test. These results show that the P300 event-related potential component is sensitive to the diverse nature of cognitive deficits in post-traumatic brain injury patients during different types of discrimination tasks. However, future research is necessary to replicate and extend these findings. |
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