Abstract: Objective To study whether the mechanism of treatment for patients with psoriasis by biofeedback relax training is related to the improvement of autonomic nervous functions. Methods Fourty one patients with psoriasis vulgaris and 30 healthy volunteers without organic diseases and obvious psychological load were selected for the examination under standardized load, using“Xin Xing”Holter recorder box and HRV analytical software. Results During the biofeedback process, the values of rMSASD, T_RR and ΔT_RR of both psoriatic group and healthy control group were significantly higher than those before biofeedback relax training (P<0.01). The average values of rMSASD,T_RR,and ΔT_RR significantly increased after biofeedback relax training in comparison with those before training,the difference was more significant (P<0.01) in psoriatic group. For psoriatic patients who were clinically recovered after biofeedback relax treatment for more than two months, it was shown that the parameters of rMSASD, T_RR and ΔT_RR also significantly improved in comparison with those before treatment (P<0.01). Conclusion The biofeedback relax training could not only enhance the parasympathetic nervous tension but also enhance sympathetic nerve excitability, and could improve general health condition to achieve the goal of treatment by way of regulating autonomic nervous functions.

Key words: Psoriasis, Biofeedback(Psychology), Heart rate variablity(HRV), Autonomic nervous pathways