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Measurement and Modification of Sensory System EEG (electroencephalographic) Characteristics during Visual-Motor Performance
Annual rept. 30 Sep 1983-29 Sep 1984
CALIFORNIA UNIV LOS ANGELES DEPT OF ANATOMY
Pagination or Media Count:
Electroencephalographic EEG and performance measures were obtained from eight adult male subjects during a sequence of 18 trials over a six-hour period consisting of alternating performance and non-performance epochs in a flight simulation task. EEG data were subjected to a limited bandpass frequency analysis. Task engagement performance was associated with greater density in central cortical rhythmic patterns, while a reciprocal decrease was observed in parietal-occipital activity. The opposite relationship was observed during non- performance segments, with density greater in parietal-occipital data. This reciprocity was most consistent in the central 8-11 Hx and parietal-occipital 4- 7 Hz bands. EEG activity from these two areas was also found to be modulated over time, with linear trends related to performance epochs. Central rhythmic activity tended to increase progressively over trials in performance epochs while parietal-occipital patterns showed the opposite trend. Parietal-occipital activity was greatest during non-performance epochs and both areas showed an in- phase periodic pattern, with a cycle duration approximating 90 minutes. Originator-supplied keywords Visual motor performance, EEG correlates of performance, Quantitative analysis, Ultradian rhythms, Somatosensory EEG, Performance prediction, Response accuracy and speed, Periodicity.
APPROVED FOR PUBLIC RELEASE