Comparison of Subthalamic Nucleus vs. Globus Pallidus Interna Deep Brain Stimulation in Terms of Gait and Balance; A Two Year Follow-Up Study

Özet

AIM: To compare the effects of subthalamic nucleus (STN) and globus pallidus interna (GPi) deep brain stimulation (DBS) on themotor outcome, gait and balance function, fall risk (FR), and non-motor symptoms in patients with advanced Parkinson’s disease(PD).MATERIAL and METHODS: We randomized patients with advanced PD with the indication of DBS to undergo either STN or GPiDBS and followed them for 2 years. We collected data at baseline and postoperative 6, 12, and 24 months. We compared changesin the Unified Parkinson’s Disease Rating Scale (UPDRS) score, timed gait tests, posturography, non-motor symptom questionnaire(NMSQuest), hospital anxiety and depression (HAD) scale, and levodopa equivalent dose (LED).RESULTS: We enrolled and randomized 12 patients to receive either STN (n = 6) or GPi (n = 6) DBS. Postoperative motor outcomeswere significantly improved in both groups (p<0.05). In both groups, timed gait tests exhibited better performance in mobility;however, patients receiving GPi DBS performed better than those receiving STN DBS in the timed gait tests (p<0.05). Furthermore,the posturographic evaluation demonstrated a significant elevation in the FR in the STN group (p<0.05).CONCLUSION: Both STN and GPi DBS are equally effective in alleviating disabling motor complications. However, seemingly, STNDBS could cause more gait and balance problems; hence, a tailored approach seems to be more appropriate in the target selection.