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Trait

Myokymia

Myokymia consists of involuntary, fine, continuous, undulating contractions that spread across the affected striated muscle.

HPO HP:0002411

Summary

Body system
Abnormality of the nervous system

10 genes linked to Myokymia

Changes in these genes cause rare conditions in which Myokymia is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.

GeneHow often it is seenConditions
ITPR1inositol 1,4,5-trisphosphate receptor type 1AlwaysIn 1 condition
SOD1superoxide dismutase 1AlwaysIn 1 condition
HINT1histidine triad nucleotide binding protein 1Very often (80–99%)In 2 conditions
KCNA1potassium voltage-gated channel subfamily A member 1Very often (80–99%)In 2 conditions
GSNgelsolinOften (30–79%)In 1 condition
LGI3leucine rich repeat LGI family member 3Often (30–79%)In 1 condition
UCHL1ubiquitin C-terminal hydrolase L1Often (30–79%)In 1 condition
MORC2MORC family CW-type zinc finger 2Sometimes (5–29%)In 2 conditions
KCNQ2potassium voltage-gated channel subfamily Q member 2Not recordedIn 1 condition
PNKDPNKD metallo-beta-lactamase domain containingNot recordedIn 1 condition

How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.

Narrower traits

Broader traits

Abnormality of movement

Where this comes from

  • The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
  • Data release 2026.10.16-c6eea6bf.

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