Effects of prolonged mental work on functional brain topography
| Autor: | Alan Gevins, Judy Illes, Henry R. Jex, James C. Miller, Steven L. Bressler, John A. Stern, B. A. Cutillo |
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| Rok vydání: | 1990 |
| Předmět: |
Male
medicine.medical_specialty Time Factors media_common.quotation_subject Audiology Brain mapping Lateralization of brain function Task (project management) Discrimination Psychological Mental Processes Event-related potential Memory Task Performance and Analysis medicine Reaction Time Contrast (vision) Humans Electrodes media_common Communication Analysis of Variance Behavior Brain Mapping business.industry General Neuroscience Brain Contingent negative variation Interval (music) Neurology (clinical) Analysis of variance Psychology business Photic Stimulation |
| Zdroj: | Electroencephalography and clinical neurophysiology. 76(4) |
| ISSN: | 0013-4694 |
| Popis: | Topographic patterns of event-related covariance between electrodes were measured from subjects performing a difficult memory and fine-motor control task for 10-14 h. Striking changes occurred in the patterns after subjects performed the task for an average of 7-9 h, but before performance deteriorated. Pattern strength was reduced in a fraction-of-a-second-long response preparation interval over midline precentral areas and over the entire left hemisphere. By contrast, pattern strength in a succeeding response inhibition interval was reduced over all areas. The pattern changed least in an intervening interval associated with visual-stimulus processing. This suggests that, in addition to the well-known global reduction in neuroelectric signal strength, functional neural networks are selectively affected by sustained mental work in specific fraction-of-a-second task intervals. |
| Databáze: | OpenAIRE |
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