Cervical dystonia is characterized by involuntary posturing of the head and frequently is associated with neck pain. Disability and social withdrawal are common. In recent years, Botulinum toxin Type A (BtA) has become the first line therapy. However its true efficacy, in particular the potential effect size, is still unclear. For the Full Story: http://www.mrw.interscience.wiley.com/cochrane/clsysrev/articles/CD003633/frame.html