Abstract
Deep brain stimulation (DBS) of the globus pallidus internus was recently proposed as a potential new treatment target for opioid addiction. DBS requires computer-assisted-3D planning to implant the stimulation electrode precisely. As volumes of brain regions may differ in addiction compared to healthy controls, our aim was to investigate possible volume differences in addicts compared to healthy controls. Volumes of the globus pallidus externus (PE) and internus (PI) in heroin addicts (n = 14) and healthy controls (n = 12) were assessed using morphometry of serial whole-brain sections. Total brain volume was larger in the heroin group (mean 1479 ± 62 cm3 vs. mean 1352 ± 103 cm3), as the heroin group was more than 10 years younger (p = 0.001). Despite larger mean whole brain volume, the mean relative volume of the PE and PI was smaller in addicted subjects compared to healthy controls (PE 0.658 ± 0.183 × 10-3 vs. 0.901 ± 0.284 × 10-3; ANOVA F(1, 24) = 6.945, p = 0.014, η2 = 0.224; PI 0.253 ± 0.095 × 10-3 vs. 0.345 ± 0.107 × 10-3; ANOVA F(1, 24) = 5.374, p = 0.029, η2 = 0.183). These findings were not significantly confounded by age, duration of autolysis, and fixation time. Our results provide further evidence for structural an...Continue Reading
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