Deficient median nerve prepulse inhibition of the blink reflex in cervical dystonia

Dystonia is characterized by sustained or intermittent muscle contractions causing abnormal, often repetitive movements, postures, or both (Albanese et al., 2013). Cervical dystonia (CD) is a focal dystonia that affects the muscles of the neck and, sometimes, the shoulders. It typically starts in adulthood and may be accompanied by jerky movements of the head and neck. Electrophysiological studies have suggested that decreased inhibition, sensory dysfunction, and abnormal plasticity play roles in the pathophysiology of dystonia (Quartarone and Hallett, 2013).

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