Living with muscle stiffness, known as spasticity, after a stroke can make moving an arm or hand very difficult. Some experts have looked into using transcranial direct current stimulation (tDCS). This is a method that uses a mild electrical current to target the brain's motor cortex to help improve movement.
Researchers reviewed nine different studies to see if this treatment actually helps patients with upper limb spasticity. The results were not consistent across the board. While three of the nine studies showed a clear benefit for patients, the other six did not show a clear improvement or had inconsistent results.
Because each study used different settings, such as different current strengths and session lengths, it is hard to say if the treatment works reliably. The evidence is currently considered inconclusive. Because of these inconsistencies, doctors do not yet have a standard way to use this method for stroke recovery.
Common questions
What is transcranial direct current stimulation?
Transcranial direct current stimulation (tDCS) is a method that uses a mild electrical current to target the primary motor cortex. This part of the brain controls movement. It is being studied as a way to help patients who experience muscle stiffness, or spasticity, in their arms after having a stroke.
Does this treatment work for everyone after a stroke?
The evidence is not clear yet. Out of nine studies reviewed, only three showed a clear benefit for upper limb spasticity. Because the study results were inconsistent and used different settings like different current intensities, it is currently considered inconclusive whether this treatment works reliably.
Why are the results not more consistent?
The results are hard to judge because the studies were very different from one another. They used different durations, different amounts of electricity, and different numbers of sessions. Because there is no standard protocol yet, it is difficult to say exactly how effective the treatment is for stroke patients.
