Background.- The objective of this study was Er evaluate the clinical efficacy of TENS on spasticity and its direct effect on H-reflex (HR) in spastic cases. Design.- Patient population consisted of 26 patients with hemiplegia and 10 normal controls. Hmax and HR recruitment curves were elicited in 16 of the 26 hemiplegic subjects (Group A) and normals (N) before, during and after TENS application. The same procedure was applied with the same appara¬tus to the remaining 10 subjects (Group B) with hemiplegia but without electrical stimulation, for con¬trol purposes. Following stimulation for 20 minutes once a day for 10 days, HR and recruitment curves were obtained from both group A and B. Results.- Inhibition of the maximum H-reflex amplitude has been observed in 9 of 10 normal con¬trols (90%) after TENS application. After the initial TENS, inhibition of H-reflex amplitude was noted in . 14 cases (87.5%) from Group A compared to 4 cases (40%) from Group B. Assessment at the 10th day of treatment revealed an increase in the ROM of the hip flexion and knee extension and considerable reduc¬tion in the spasticity score. No significant change of H-reflex was detected. Conclusion.- Application of TENS for ten days provided some relief in the severity of spasticity in hemiplegic cases.