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High-definition Transcranial Electrical Stimulation for Upper Extremity Rehabilitation
Sponsor: National Taiwan University Hospital
Summary
Upper limb hemiparesis is the most common sequelae in patients, severely impacting their independence and quality of life. Transcranial electrical stimulation (tCES) is a non-invasive and safe treatment, which uses a low direct current or alternating current to change the excitability of the cerebral cortex. It can induces long-term potentiation-like or long-term depression-like effects, thereby modulating the cortical excitability. In recent years, researchers have developed high-definition (HD) devices, which integrate high definition ring electrode configurations and incorporate direct current with theta burst stimulation waveforms. Diverging from traditional transcranial direct current stimulation (tDCS), which applies weak currents (0.5-2 mA) through two large sponge electrodes (25\~35 cm\^2) externally to the scalp for widespread non-specific cortical stimulation, HD-tES employs an array of small-area electrodes (1 cm\^2) to control current distribution over localized cortical regions, thereby enhancing spatial accuracy. However, there is a lack of studies validating the optimal waveform for HD-tES, as well as clinical evidence in subacute stroke populations. The optimal unilateral versus bilateral stimulation modes and their neurological mechanisms for stroke rehabilitation also remain uncertain.
Official title: Neural Mechanisms and Augmented Efficacy of High-definition Transcranial Electrical Stimulation on Upper-extremity Function in Patients With Subacute Stroke
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
152
Start Date
2024-08-15
Completion Date
2026-11-30
Last Updated
2024-08-16
Healthy Volunteers
Yes
Conditions
Interventions
HD-tES
The intensity of HD-tES is set at 2 mA, the current intensity ramps up to 2 mA within 5 seconds, remains at 2 mA for 10 minutes, and then ramps down to zero within 5 seconds. For the sham stimulation, the current intensity ramps up and down at the first and last 10 seconds, with the remaining 10 minutes set at 0 mA. The inhibitory and excitatory waveform will be selected based on results of sub-project 1.
Sham HD-tES
The intensity of HD-tES is set at 2 mA, the current intensity ramps up to 2 mA within 5 seconds, remains at 2 mA for 10 minutes, and then ramps down to zero within 5 seconds. For the sham stimulation, the current intensity ramps up and down at the first and last 10 seconds, with the remaining 10 minutes set at 0 mA. The inhibitory and excitatory waveform will be selected based on results of sub-project 1.
UE rehabilitation
Upper extremity rehabilitation programs will be selected and graded in accordance with each patient's upper extremity function and specific aims of activities of daily living. Upper extremity rehabilitation will be provided for 60 minutes each time, 5 times a week, lasting for 3 weeks.
HD-tES (Bilateral)
The intensity of HD-tES is set at 2 mA, the current intensity ramps up to 2 mA within 5 seconds, remains at 2 mA for 10 minutes, and then ramps down to zero within 5 seconds.
Locations (3)
New Taipei City Tucheng Hospital
New Taipei City, Taiwan
National Taiwan University Hospital
Taipei, Taiwan
Taipei Medical University Hospital
Taipei, Taiwan