Objectives. To assess the severity of pain syndrome, emotional status, and quantitative levels of humoral serotonin in patients with cervical dystonia (CD) before and after botulinum therapy. Materials and methods. A simple open comparative study of the clinical characteristics of hyperkinesia, pain, and emotional status, quality of life, and serum and platelet serotonin levels was conducted in 48 patients with cervical dystonia at age 37–53 years before and one month after botulinum therapy with botulinum toxin A (Dysport) at doses of 500–1000 U. The control group consisted of 15 healthy subjects. Results. All patients presented with complaints of involuntary movements and neck pain. The overall indicator on the dystonic movements scale among the patients was 16.7 ± 7.7 points and the score on the TWSTRS scale was 46.48 ± 6.2 points; the mean visual analog pain score was 6.4 ± 1.08 points. The levels of depression and anxiety on the Hamilton scale were significantly greater in the patients group than in the controls. The levels of reactive and trait anxiety on the Spielberger–Hanin test in patients with CD were significantly (p < 0.005) greater than those in the healthy group. Correlation analysis identified a direct relationship between pain intensity on the TWSTRS scale and the level of anxiety on the Hamilton scale and the total points score for dystonic movements. Serum and platelet serotonin levels were significantly lower than in controls. After botulinum therapy, patients showed significant reductions in pain, anxiety, and depression, while platelet serotonin increased. Conclusions. Botulinum therapy with Dysport decreased the levels of pain and depression in patients with CD, improved quality of life, and stimulated the serotoninergic system.
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