Early Deformation of Deep Brain Stimulation Electrodes Following Surgical Implantation: Intracranial, Brain, and Electrode Mechanics.

However, the brain shift index was substantially higher on the left and for the non-directional electrodes, respectively, on the left 11.77 ± 37.29% × 10 –4 for the non-directional versus 0.18 ± 0.65% × 10 –4 for the directional, and 1.19 ± 4.44 versus 1.69 ± 4.81 on the right, although this did not reach statistical significance because of the variability (right versus left, Wilcoxon, p = 0.07; left, non-directional versus directional, Kruskal–Wallis, p = 0.07).

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