Scalp Acupuncture (Craniopuncture) in Post-Stroke Rehabilitation: Systematic Review Shows Adjunctive Benefit on Motor Function

Scalp acupuncture — also known as craniopuncture — is a family of techniques that stimulates specific áreas of the scalp, mapped in correspondence with motor córtex, sensory córtex, and functional brain áreas. It includes schools such as Yamamoto New Scalp Acupuncture (YNSA), Zhu (Jiao) scalp acupuncture, and the classical Chinese form standardized by WFAS. In post-stroke rehabilitation, scalp acupuncture has been investigated as an adjunctive technique to conventional motor rehabilitation (kinesiotherapy, occupational therapy, speech therapy), with systematic reviews bringing together trials from various schools.

What the Literature Shows

The systematic reviews converge on a moderate benefit of adjunctive scalp acupuncture compared with conventional rehabilitation alone, with consistent signals of improvement on motor scales (Fugl-Meyer for upper and lower limbs), on functional scales (Barthel, mRS), and in some trials also on measures of spasticity (MAS) and balance (Berg Balance Scale). The effect is typically larger in the subacute phase than in the late chronic phase, and when treatment is intensive (daily sessions or every other day, for 4-8 weeks).

Mechanistic Plausibility

The choice of scalp zones is based on neuroanatomic correspondence with primary motor córtex, somatosensory córtex, Broca’s área, and associated áreas. Superficial stimulation of these regions, mainly with electrostimulation, appears to modulate cortical excitability via trans-synaptic pathways and branches of the trigeminal nerve. Translational studies suggest increases in neurotrophic factors (BDNF, NGF), modulation of activity-dependent neuroplasticity, and reduction of perilesional neuroinflammation.

Limitations of the Evidence

The literature is dominated by Asian studies with variability in protocols (scalp school used, zones stimulated, presence or absence of electrostimulation). Blinding is difficult — a plausible scalp placebo is challenging. Multicenter Western trials with standardization of technique and long follow-up are lacking. Direct comparisons between different scalp schools are rare.