GPI and Dystonia: It is of interest to note that similar surgical procedures—pallidotomy (therapeutic lesion) and high-frequency electric deep brain stimulation (DBS) in the internal Globus Pallidus (GPi)—are used to treat the symptoms of both disorders [for example, see (Lozano et al., 1997) for pallidotomy in dystonia; (Vidailhet et al., 2005, 2007; Kupsch et al., 2006) for GPi DBS in dystonia; (Laitinen et al., 1992; Lang et al., 1997) for pallidotomy in Parkinson's disease; (Moro et al., 2010) for GPi DBS in Parkinson's disease].