Date amended:
Statements of Principles
Current RMA Instruments
Reasonable Hypothesis SOP
63 of 2016
Balance of Probabilities SOP
64 of 2016
Changes from previous Instruments


ICD Coding:
  • ICD-9-CM Codes: 333.83
  • ICD-10-AM Codes: G24.3
Brief description

Spasmodic torticollis is an involuntary movement disorder of the neck, involving sustained or intermittent muscle contractions that result in twisting and repetitive movements or abnormal postures.

Confirming the diagnosis

Diagnosis is based on the clinical features.  There are no specific diagnostic tests.

The relevant medical speciailist is a neurologist.

Related conditions that may be covered by SOP (further information required)
  • Torticollis
  • Cervical dystonia
  • Focal or segmental dystonia affecting the neck
Conditions not covered by SOP
  • post-traumatic dystonia
  • drug-induced tardive dystonia
  • generalised or hemi-dystonia
Clinical onset

Clinical onset will be when the pattern of involuntary movements, subsequently confirmed to be due to spasmodic torticollis, first manifest.

Clinical worsening

The only SOP (worsening) factor is for inability to obtain appropriate clinical management.  Available treatments are directed at relief of symptoms but do not alter the underlying pathology of the disease.