Dystonic neck muscles show a shift in relative autospectral power during isometric contractions

Idiopathic cervical dystonia (CD) is a neurological movement disorder characterized by involuntary neck muscle contractions (Fahn, 1988). The pathophysiology of CD remains unclear, although functional and morphometric changes have been found in several brain areas, such as the cerebral cortex (Draganski et al., 2003; Egger et al., 2007; Obermann et al., 2007; de Vries et al., 2012), superior colliculus (Holmes et al., 2012), thalamus (Krauss et al., 1999; Chang et al., 2002; Butterworth et al., 2003; Kupsch et al., 2006; Vidailhet et al., 2007), and cerebellum (LeDoux and Brady, 2003; Neychev et al., 2008; Sadnicka et al., 2012; Prudente et al., 2013).

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