Electrophysiological localization of brain regions involved in perceptual memory
| Autor: | Svein Magnussen, Paal G. Larsson, Mark W. Greenlee, Ivar Reinvang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
Electromyography
General Neuroscience Interstimulus interval Memoria Parietal lobe Electroencephalography Cognition Temporal lobe Visual memory Memory Space Perception Encoding (memory) 150 Psychologie Event-related potentials Memory Spatial frequency Human Psychophysics Evoked Potentials Visual Humans ddc:150 570 Biowissenschaften Biologie ddc:570 Latency (engineering) Psychology Neuroscience Photic Stimulation Visual Cortex |
| Popis: | Event-related potentials (ERP) were recorded during perceptual discrimination and short-term memory, varying the interstimulus interval (1–10 s) in delayed spatial frequency discrimination. Accuracy of discrimination remained unimpaired across this time interval, but choice reaction times increased. A brain source localization (BESA) model showed that the activity of the parietal and right temporal sources increased with long retention intervals in a sequential activation pattern where a long-latency component of the parietal source specific to the memory condition was observed, the latency of which matched a memory-related increase in choice reaction times in the cognitive task. It is suggested that the temporal sources are involved in encoding and storage of visual information, and the parietal source is involved in memory retrieval. |
| Databáze: | OpenAIRE |
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