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Upper extremity motor impairment is one of the major sequelae of stroke, resulting in limitation of activities of daily livings. Noninvasive neuromodulation is one of the therapies for motor recovery, which includes transcranial magnetic stimulation and transcranial direct current stimulation(tDCS). Anodal tDCS increases excitability and cathodal tDCS decreases excitability of neurons.
In systematic reviews, tDCS applied over primary motor cortex showed positive results on motor learning and improvements of hand fine motors. Recently, there has been trials of tDCS over cerebellum, considering the connectivity of primary motor cortex and cerebellum in motor controls. However, the results of these trials are yet contradictory, and the study using the functional near infrared spectroscopy to prove the effects of tDCS over distant area is lacking.
Therefore, in this study, we used functional near infrared spectroscopy (fNIRS) to observe the hemodynamic change of primary motor cortex when applying tDCS over cerebellum ascertain their connectivity.
In this crossover design, participants are randomly allocated to "sham tDCS-washout period-anodal tDCS group" or "anodal tDCS- washout period- sham tDCS group". The recording of fNIRS starts 3 minutes before the tDCS stimulation and continues throughout 20 minutes of stimulation, until 30 minutes after the stimulation cessation. After 7 days of washout period, second recording is done as the same protocol. Outcome measures are the changes of concentration of deoxyhemoglobin [deoxy-Hb] and oxyhemoglobin [oxy-Hb].
Seoul National University Bundang Hospital
Korea, Republic of
Seoul National University Hospital
Published on BioPortfolio: 2019-09-30T07:07:16-0400
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Restoration of functions to the maximum degree possible in a person or persons suffering from a stroke.
Stroke caused by lacunar infarction or other small vessel diseases of the brain. It features hemiparesis (see PARESIS), hemisensory, or hemisensory motor loss.
A group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to BRAIN ISCHEMIA or INTRACRANIAL HEMORRHAGES. Stroke is classified by the type of tissue NECROSIS, such as the anatomic location, vasculature involved, etiology, age of the affected individual, and hemorrhagic vs. non-hemorrhagic nature. (From Adams et al., Principles of Neurology, 6th ed, pp777-810)
A condition caused by the failure of body to dissipate heat in an excessively hot environment or during PHYSICAL EXERTION in a hot environment. Contrast to HEAT EXHAUSTION, the body temperature in heat stroke patient is dangerously high with red, hot skin accompanied by DELUSIONS; CONVULSIONS; or COMA. It can be a life-threatening emergency and is most common in infants and the elderly.
A strain of Rattus norvegicus with elevated blood pressure used as a model for studying hypertension and stroke.
Stroke - Cerebrovascular Disease (CVA)
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Neurology - Central Nervous System (CNS)
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