Journal of Rehabilitation Neurosciences
Online ISSN : 2434-2637
Print ISSN : 2434-2629
Volume 21, Issue 1
Displaying 1-3 of 3 articles from this issue
Review Article
Case Report
  • Kohei KURITA, Jun TAKASUGI, Yoshiyuki HIRANO
    Article type: Case Report
    2021 Volume 21 Issue 1 Pages 10-16
    Published: 2021
    Released on J-STAGE: October 29, 2021
    Advance online publication: January 08, 2021
    Mirror writing refers to writing as if the script was reflected in a mirror. This study describes the case of a patient who exhibited mirror writing with her left hand after suffering thalamic hemorrhage. Before the stroke, she was right-handed, but became unable to write with her right hand due to severe paralysis. Afterwards, she began writing with her left hand and mirror writing emerged. Interestingly, her mirror writing occurred frequently, even six months after the stroke. In addition, these features influenced the writing direction. There are more frequently emerged leftward and vertical directions. The reason why the feature of the phenomenon is characteristics of the movement to write a letter with left hand, and the role of the right hemisphere for writing.
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Tutorial Note
  • Kotaro TAKEDA, Toru YAMADA, Akihiro ISHIKAWA, Yoshihiro INOUE, Yohei O ...
    Article type: Tutorial Note
    2021 Volume 21 Issue 1 Pages 17-22
    Published: 2021
    Released on J-STAGE: October 29, 2021
    Advance online publication: September 16, 2021
    Functional near-infrared spectroscopy (fNIRS) is an optical neuroimaging method for recording cerebral hemodynamics. Tolerance of motion is considered an advantage of fNIRS when compared with other imaging techniques. However, fNIRS signals are often contaminated by scalp blood flow (SBF) signals due to motion of the subject. In the present study, we recorded changes in the concentrations of oxygenated and deoxygenated hemoglobin by multidistance source-detector probes during whole body tilting with the head and trunk fixed, and demonstrated that the change in body direction against gravity causes SBF signal contamination. Non-negligible parallel changes in oxygenated and deoxygenated hemoglobin during trunk tilt were observed in long-distance channels (conventional 30 mm), as well as those in short-distance channels (15 mm) reflecting SBF changes. Because the tilt angle-dependent changes in the long channels were correlated highly with those in the short channels, the fluctuation caused by the trunk tilt could be considered SBF signal contamination. The contamination was successfully removed by a multidistance method and by a hemodynamic modality separation method.
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