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Exploring Cognitive Functions in Babies, Children & Adults with Near Infrared Spectroscopy
Published on: July 28, 2009
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Exploring Hemodynamic Responses Using Mirror Visual Feedback With Electromyogram-Triggered Stimulation and Functional
Yuji Inagaki1, Kazunori Seki2, Hitoshi Makino3
1Department of Rehabilitation Medicine, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
Frontiers in Human Neuroscience
|March 14, 2019
Summary
Mirror visual feedback (MVF) activates the postcentral gyrus during movement observation. Combining MVF with electromyogram-triggered electrical stimulation (ETES) reduced cortical activation in healthy subjects.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
Background:
- Mirror visual feedback (MVF) and electrical stimulation (ES) are explored for hemiparesis.
- The neurophysiological impact of these combined therapies remains unclear.
Purpose of the Study:
- To investigate the hemodynamic brain responses to MVF alone and with electromyogram-triggered ES (ETES).
- To determine the contribution of different visual feedback components and ES to cortical activation.
Main Methods:
- Functional near-infrared spectroscopy (fNIRS) measured brain oxygenation in 18 healthy subjects.
- NIRS assessed activation in precentral gyrus, postcentral gyrus, SMA, SMG, and AG.
- Effects of visual feedback (mark, right hand, mirrored movements) with/without ES were analyzed.
Main Results:
- Mirrored tasks (MT) significantly activated the left postcentral gyrus (PoG) more than other tasks.
- The right PoG and right supplementary motor area (SMA) showed higher activation in MT compared to MT + ES.
- Observation of movements via mirror primarily activated the PoG, not the precentral gyrus (PrG).
Conclusions:
- MVF observation of movements activates the postcentral gyrus.
- Combined MVF and ETES therapy may decrease cortical activation compared to MVF alone.
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