Myorhythmia

A rare movement disorder characterized by repetitive, rhythmic, slow (1–4 Hz), tremor-like or jerky muscle contractions involving cranial and limb muscles, typically occurring at rest and during voluntary movement and usually associated with lesions affecting the brainstem, cerebellum, or thalamus.

Causes

• Stroke

  • Brainstem infarction

  • Thalamic infarction

  • Brainstem hemorrhage

• Traumatic brain injury

• Multiple sclerosis

• Neurodegenerative disorders involving the dentato-rubro-olivary pathway

• Wilson's disease affecting the central nervous system

• Malignancy

  • Central nervous system lymphoma

  • Brainstem tumors

  • Thalamic tumors

• Paraneoplastic neurological syndromes

• Autoimmune encephalitis

• Infectious causes

  • Whipple's disease

  • Infectious encephalitis

    • Listeria monocytogenes

    • Treponema pallidum (neurosyphilis)

    • Other infectious encephalitides