Significant positive effect of chronic globus pallidus internus stimulation on dystonic dysphonia accompanying torticollis

Objective: In dystonic dysphonia – which may accompany and aggravate facial and cervical dystonia –, abnormal or dystonic muscle contractions can affect the muscles that close (adduction) or open (abduction) the laryngeal mechanism causing the voice to break or to have a tight, strained or strangled quality. Treatment usually consists of local Botolinum-Toxin-A (BTX-A) injections. We here present the immediate post-operative results and clinical follow for 2 adult patients undergoing Globus pallidus internus (Gpi) – deep brain stimulation (DBS) for cervical dystonia who also suffered from severely disabling dyst…