Cerebral haemodynamics during motor imagery of self-feeding with chopsticks: differences between dominant and non-dominant hand |
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Authors: | Moemi Matsuo Naoki Iso Kengo Fujiwara Takefumi Moriuchi Goro Tanaka Sumihisa Honda |
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Institution: | 1. Unit of Medical Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan;2. Center for Child Mental Health Care and Education, Nagasaki University, Nagasaki, Japan;3. Tokyo Kasei University, Saitama, Japan;4. Zeshinkai General Incorporated Association, Nagasaki Rehabilitation Hospital, Ginyamachi, Nagasaki, Japan |
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Abstract: | AbstractPurpose: Motor imagery is defined as a dynamic state during which a subject mentally simulates a given action without overt movements. Our aim was to use near-infrared spectroscopy to investigate differences in cerebral haemodynamics during motor imagery of self-feeding with chopsticks using the dominant or non-dominant hand.Materials and methods: Twenty healthy right-handed people participated in this study. The motor imagery task involved eating sliced cucumber pickles using chopsticks with the dominant (right) or non-dominant (left) hand. Activation of regions of interest (pre-supplementary motor area, supplementary motor area, pre-motor area, pre-frontal cortex, and sensorimotor cortex was assessed.Results: Motor imagery vividness of the dominant hand tended to be significantly higher than that of the non-dominant hand. The time of peak oxygenated haemoglobin was significantly earlier in the right pre-frontal cortex than in the supplementary motor area and left pre-motor area. Haemodynamic correlations were detected in more regions of interest during dominant-hand motor imagery than during non-dominant-hand motor imagery.Conclusions: Haemodynamics might be affected by differences in motor imagery vividness caused by variations in motor manipulation. |
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Keywords: | Imagery (psychotherapy) haemodynamics motor cortex spectroscopy near-infrared rehabilitation mental practice |
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