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Journal of Korean Neurosurgical Society > Volume 46(4); 2009 > Article
Journal of Korean Neurosurgical Society 2009;46(4): 346-350.
doi: https://doi.org/10.3340/jkns.2009.46.4.346
Pallidal Deep Brain Stimulation in Primary Cervical Dystonia with Phasic Type : Clinical Outcome and Postoperative Course.
Seong Gyu Jeong, Myung Ki Lee, Ju Young Kang, Sung Man Jun, Won Ho Lee, Chang Ghu Ghang
1Department of Neurosurgery, Bongseng Memorial Hospital, Busan, Korea. stereomk@naver.com
2Department of Neurology, Bongseng Memorial Hospital, Busan, Korea.
ABSTRACT
OBJECTIVE:
The purpose of this study was to analyze in detail the relationship between outcome and time course of effect in medically refractory primary cervical dystonia (CD) with phasic type that was treated by bilateral globus pallidus internus (Gpi) deep brain stimulation (DBS).
METHODS:
Six patients underwent bilateral implantation of DBS into the Gpi under the guide of microelectrode recording and were followed for 18.7 +/- 11.1 months. The mean duration of the CD was 5.8 +/- 3.4 years. The mean age at time of surgery was 54.2 +/- 10.2 years. Patients were evaluated with the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) and relief scale using patient self-reporting.
RESULTS:
The TWSTRS total scores improved by 64.5%, 65.5%, 75.8%, and 76.0% at 3, 6, 12 months, and at the last available follow-up after surgery, respectively. Statistically significant improvements in the TWSTRS scores were observed 3 months after surgery (p = 0.028) with gradual improvement up to 12 months after surgery, thereafter, the improvement was sustained. However, there was no statistically significant difference between the scores at 3 and 12 months. Subjective improvement reported averaged 81.7 +/- 6.8% at last follow-up. Mild dysarthria, the most frequent adverse event, occurred in 3 patients. Conclusions: Our results show that the bilateral Gpi-DBS can offer a significant therapeutic effect from 3 months postoperatively in patients with primary CD with phasic type, without significant side effects.
Key Words: Globus pallidus; Cervical dystonia; Deep brain stimulation
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