8A06.1

ICD-11 MMS 2026-01

Segmental myoclonus

Description

Rhythmic or semi-rhythmic involuntary contractions of muscle groups supplied by one or more contiguous segments of the brainstem and/or spinal cord.

Index terms

  • Segmental myoclonus
  • Spinal segmental myoclonus
  • Propriospinal myoclonus

Exclusions from above levels

  • 8A02.11 – Dystonia-plus
  • 8B88.1 – Facial myokymia
  • http://id.who.int/icd/entity/1397288146 – myoclonic epilepsy
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  • 6A06 – Stereotyped movement disorder
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • 8A06.0 – Essential myoclonus
  • 8A06.2 – Focal myoclonus
  • 8A06.Y – Other specified myoclonic disorders
  • 8A06.Z – Myoclonic disorders, unspecified

Foundation entity

Segmental myoclonus – http://id.who.int/icd/entity/1126823287

Part of: 8A06: Myoclonic disorders › 08: Diseases of the nervous system