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Oxyhemoglobin changes in the prefrontal cortex in response to cognitive tasks: a systematic review |
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| Authors: | Leandro Viçosa Bonetti Syed A Hassan Sin-Tung Lau Luana T Melo Takako Tanaka Kara K Patterson |
| Affiliation: | 1. Department of Physical Therapy, University of Toronto, Toronto, ON, Canada;2. Department of Physical Therapy, Universidade de Caxias do Sul, Rio Grande do Sul, Brazil;3. Rehabilitation Sciences Institute, University of Toronto, Toronto, ON, Canada;4. Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON, Canada;5. Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada;6. Department of Cardiopulmonary Rehabilitation Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan |
| Abstract: | Purpose of the study: the aim of this study was to synthesize PFC fNIRS outcomes on the effects of cognitive tasks compared to resting/baseline tasks in healthy adults from studies utilizing a pre/post design. Material and methods: original research studies were searched from seven databases (MEDLINE, EMBASE, CENTRAL, CINAHL, SCOPUS, PEDro and PubMed). Subsequently, two independent reviewers screened the titles and abstracts followed by full-text reviews to assess the studies' eligibility. Results: eleven studies met the inclusion criteria and had data abstracted and quality assessed. Methodology varied considerably and yet cognitive tasks resulted in the ΔO2Hb increasing in 8 of the 11 and ΔHHb decreasing in 8 of 8 studies that reported this outcome. The cognitive tasks from 10 of the 11 studies were classified as “Working Memory” and “Verbal Fluency Tasks”. Conclusions: although, the data comparison was challenging provided the heterogeneity in methodology, the results across studies were similar. |
| Keywords: | Prefrontal cortex near infrared spectroscopy cognitive task oxyhemoglobins healthy subjects |
