Cortical oxygen consumption in mental arithmetic as a function of task difficulty: a near-infrared spectroscopy approach
Please always quote using this URN: urn:nbn:de:bvb:20-opus-122449
- The present study investigated changes in cortical oxygenation during mental arithmetic using near-infrared spectroscopy (NIRS). Twenty-nine male volunteers were examined using a 52-channel continuous wave system for analyzing activity in prefrontal areas. With the help of a probabilistic mapping method, three regions of interest (ROIs) on each hemisphere were defined: The inferior frontal gyri (IFG), the middle frontal gyri (MFG), and the superior frontal gyri (SFG). Oxygenation as an indicator of functional brain activation was compared overThe present study investigated changes in cortical oxygenation during mental arithmetic using near-infrared spectroscopy (NIRS). Twenty-nine male volunteers were examined using a 52-channel continuous wave system for analyzing activity in prefrontal areas. With the help of a probabilistic mapping method, three regions of interest (ROIs) on each hemisphere were defined: The inferior frontal gyri (IFG), the middle frontal gyri (MFG), and the superior frontal gyri (SFG). Oxygenation as an indicator of functional brain activation was compared over the three ROI and two levels of arithmetic task difficulty (simple and complex additions). In contrast to most previous studies using fMRI or NIRS, in the present study arithmetic tasks were presented verbally in analogue to many daily life situations. With respect to task difficulty, more complex addition tasks led to higher oxygenation in all defined ROI except in the left IFG compared to simple addition tasks. When compared to the channel positions covering different gyri of the temporal lobe, the observed sensitivity to task complexity was found to be restricted to the specified ROIs. As to the comparison of ROIs, the highest oxygenation was found in the IFG, while MFG and SFG showed significantly less activation compared to IFG. The present cognitive-neuroscience approach demonstrated that NIRS is a suitable and highly feasible research tool for investigating and quantifying neural effects of increasing arithmetic task difficulty.…
Author: | Martin Verner, Martin J. Herrmann, Stefan J. Troche, Claudia M. Roebers, Thomas H. Rammsayer |
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URN: | urn:nbn:de:bvb:20-opus-122449 |
Document Type: | Journal article |
Faculties: | Medizinische Fakultät / Klinik und Poliklinik für Psychiatrie, Psychosomatik und Psychotherapie |
Language: | English |
Parent Title (English): | Frontiers in Human Neuroscience |
ISSN: | 1662-5161 |
Year of Completion: | 2013 |
Volume: | 7 |
Issue: | 217 |
Source: | Frontiers in Human Neuroscience 7:217. doi: 10.3389/fnhum.2013.00217 |
DOI: | https://doi.org/10.3389/fnhum.2013.00217 |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Tag: | FMRI; NIRS; activation; bold; brain-regions; cortical activation; individual differences; intelligibility; mental arithmetic; near-infrared spectroscopy; oxygen consumption; prefrontal cortex; subsctraction; task difficulty; working memory |
Release Date: | 2016/02/25 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung |