The validity of functional near-infrared spectroscopy recordings of visuospatial working memory processes in humans
| Autor: | Thomas Rammsayer, Stefan J. Troche, Andreas Jaakko Metz, Joëlle S. Witmer, Eva A. Aeschlimann |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
validity
duration discrimination specificity Sensory system fNIRS Cognitive neuroscience behavioral disciplines and activities 050105 experimental psychology Lateralization of brain function Article lcsh:RC321-571 Task (project management) 03 medical and health sciences 0302 clinical medicine 0501 psychology and cognitive sciences Brodmann area 8 subjective task demand lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry visuospatial working memory capacity Working memory General Neuroscience 05 social sciences sensitivity mental ability Cognition Functional near-infrared spectroscopy 370 Education Psychology 150 Psychology 030217 neurology & neurosurgery Cognitive psychology |
| Zdroj: | Witmer, Joëlle S.; Aeschlimann, Eva A.; Metz, Andreas J.; Troche, Stefan J.; Rammsayer, Thomas H. (2018). The validity of functional near-infrared spectroscopy recordings of visuospatial working memory processes in humans. Brain Sciences, 8(4) MDPI 10.3390/brainsci8040062 Brain Sciences; Volume 8; Issue 4; Pages: 62 Brain Sciences Brain Sciences, Vol 8, Iss 4, p 62 (2018) |
| DOI: | 10.3390/brainsci8040062 |
| Popis: | Functional near infrared spectroscopy (fNIRS) is increasingly used for investigating cognitive processes. To provide converging evidence for the validity of fNIRS recordings in cognitive neuroscience, we investigated functional activation in the frontal cortex in 43 participants during the processing of a visuospatial working memory (WM) task and a sensory duration discrimination (DD) task functionally unrelated to WM. To distinguish WM-related processes from a general effect of increased task demand, we applied an adaptive approach, which ensured that subjective task demand was virtually identical for all individuals and across both tasks. Our specified region of interest covered Brodmann Area 8 of the left hemisphere, known for its important role in the execution of WM processes. Functional activation, as indicated by an increase of oxygenated and a decrease of deoxygenated hemoglobin, was shown for the WM task, but not in the DD task. The overall pattern of results indicated that hemodynamic responses recorded by fNIRS are sensitive to specific visuospatial WM capacity-related processes and do not reflect a general effect of increased task demand. In addition, the finding that no such functional activation could be shown for participants with far above-average mental ability suggested different cognitive processes adopted by this latter group. |
| Databáze: | OpenAIRE |
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