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Dystonias are sustained or intermittent abnormal repetitive movements or postures due to alterations in muscle tone. The dystonia spasms may affect one (focal, e.g. blepharospasm of eyelid) or more (segmental, e.g. neck—spasmodic torticollis) parts of the body or the whole body (generalised, e.g. oculogyric crisis).
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Generalised dystonia Usually drug induced, e.g. levodopa, psychotropics. Treatment: benztropine 1–2 mg IM or IV
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Blepharospasm (uncontrolled blinking)
Oromandibular (jaw grinding and grimacing)
Meige syndrome (combination of above two)
Hemifacial spasms (eye spreading to face): related to facial nerve irritation
Cervical dystonia (spasmodic torticollis)
Laryngeal or spastic dystonia—strained hoarse voice
Hand and forearm cramps (e.g. writer’s, typist’s, golfer’s or pianist’s cramps)
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Treatment Injection of purified botulinum A toxin into affected muscle groups—with care. Usually repeated every 3–6 mths.