Stroke patients who received acupuncture at genuine acupoints showed measurable gains in muscle function that sham treatment did not produce, according to a randomized trial published in CNS Neuroscience & Therapeutics. Researchers led by X. Yu assigned 56 stroke patients in a 2:1 ratio to either true-acupoint or sham-acupoint acupuncture across two weeks. Only the true-acupoint group improved significantly on motor recovery testing.
The more unusual part of the finding came from brain imaging. Patients in the true-acupoint group showed increases in grey matter volume in the right opercular inferior frontal gyrus, the postcentral gyrus, and a cerebellar region, and those increases tracked positively with how much limb motor function returned. The authors suggest these changes may sharpen motor initiation, execution, control, and coordination, offering a plausible central mechanism for how acupuncture exerts its effect rather than leaving it as an unexplained clinical observation.
That distinction matters for anyone weighing rehabilitation options after a stroke, where one-sided paralysis is a common and stubborn outcome. Trials that pair a functional outcome with a structural brain correlate move the conversation past whether patients simply feel better and toward what might be physically changing in recovering tissue. The design also used sham acupuncture as a comparison, which helps separate the effect of needling at specific points from the general experience of receiving treatment.
The study was small, with 56 participants and a two-week treatment window, so the durability of both the motor gains and the imaging changes remains an open question. Larger and longer trials would be needed to establish how these findings translate into standard stroke rehabilitation practice.