Sensorimotor Cortex Activation during Mirror Therapy in Healthy Right-Handed Subjects: A Study with Near-Infrared Spectroscopy

Autor:	Kotaro Takeda, Taizo Shiomi, Takamichi Taniguchi, Itsuki Imai, Hiroyuki Kato
Rok vydání:	2008
Předmět:	Brain activation Right handed business.industry Significant difference Healthy subjects Physical Therapy Sports Therapy and Rehabilitation Anatomy medicine.disease Mirror therapy Laterality Medicine business Stroke Neuroscience Sensorimotor cortex
Zdroj:	Journal of Physical Therapy Science. 20:141-145
ISSN:	2187-5626 0915-5287
DOI:	10.1589/jpts.20.141
Popis:	Clinical studies have shown that functional motor recovery after stroke may be facilitated by mirror therapy (MT). However, its underlying mechanism is uncertain. In this study, we examined brain activation during unilateral hand movement in 5 right-handed healthy subjects (1 male and 4 females) with or without viewing a mirror reflection of the moving hand (MT). We measured the changes in the concentration of oxygenated hemoglobin in the primary sensorimotor cortex (SMC) using near-infrared spectroscopy. We calculated the laterality index (LI) using the extent of activation in the right and left SMCs. The LIs (± standard error of mean) during right hand grasping without and with MT were 0.17 ± 0.11 (left SMC predominance) and -0.42 ± 0.24 (right SMC predominance), respectively (p < 0.05). However, there was no significant difference in LIs during left hand grasping without and with MT (0.02 ± 0.05 and 0.08 ± 0.05, respectively). The findings suggest that MT is more effective when it is used for dominant right hand movement, and this phenomenon may be the related to the different manipulability between the dominant and non-dominant hands.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5902e1e23b1d196a7de69bcbe46f6258 https://doi.org/10.1589/jpts.20.141 Zobrazit plný text záznamu