Published online by Cambridge University Press: 05 February 2014
Introduction
The primary focus of this chapter is to provide a review of the technical requirements and techniques for performing brightness mode (B-mode) ultrasound (US) to guide botulinum neurotoxin (BoNT) injections for cervical dystonia (CD). A brief review of the advantages and disadvantages of various guidance techniques and the supporting literature is also presented.
Cervical dystonia
Idiopathic CD is the most common form of focal dystonia worldwide (Defazio et al., 2004; Jankovic, 2004). It is characterized by sustained muscle contraction leading to abnormal postures and twisting movements of the head and neck. Patients with CD report functional limitations and pain associated with the muscle pulling or twisted postures. The combination of pain and posturing affect many activities of daily living and quality of life and limit participation in work, family life and avocational interests. A full review of the diagnosis, patterns of muscle involvement and range of therapies for CD is covered elsewhere in this text.
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