{
  "url": "https://dantelabs.com/traits/percussion-myotonia",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "percussion-myotonia",
    "id": "HP:0010548",
    "name": "Percussion myotonia",
    "definition": "A localized myotonic contraction in a muscle in reaction to percussion (tapping with the examiner's finger, a rubber percussion hammer, or a similar object).",
    "synonyms": [
      "Transient swelling of muscle induced by percussion"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-musculoskeletal-system",
        "name": "Abnormality of the musculoskeletal system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-musculoskeletal-system"
      }
    ],
    "broader": [
      {
        "slug": "myotonia",
        "name": "Myotonia",
        "url": "https://dantelabs.com/traits/myotonia"
      }
    ],
    "narrower": [
      {
        "slug": "muscle-mounding",
        "name": "Muscle mounding",
        "genes": 2,
        "url": "https://dantelabs.com/traits/muscle-mounding"
      },
      {
        "slug": "percussion-induced-rapid-rolling-muscle-contractions",
        "name": "Percussion-induced rapid rolling muscle contractions",
        "genes": 2,
        "url": "https://dantelabs.com/traits/percussion-induced-rapid-rolling-muscle-contractions"
      }
    ],
    "genes": [
      {
        "slug": "scn4a",
        "symbol": "SCN4A",
        "hgnc": "HGNC:10591",
        "name": "sodium voltage-gated channel alpha subunit 4",
        "frequency": "obligate",
        "diseases": 3,
        "url": "https://dantelabs.com/genes/scn4a"
      },
      {
        "slug": "clcn1",
        "symbol": "CLCN1",
        "hgnc": "HGNC:2019",
        "name": "chloride voltage-gated channel 1",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/clcn1"
      },
      {
        "slug": "cox11",
        "symbol": "COX11",
        "hgnc": "HGNC:2261",
        "name": "cytochrome c oxidase copper chaperone COX11",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cox11"
      },
      {
        "slug": "hspg2",
        "symbol": "HSPG2",
        "hgnc": "HGNC:5273",
        "name": "heparan sulfate proteoglycan 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hspg2"
      },
      {
        "slug": "svil",
        "symbol": "SVIL",
        "hgnc": "HGNC:11480",
        "name": "supervillin",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/svil"
      },
      {
        "slug": "dnajb6",
        "symbol": "DNAJB6",
        "hgnc": "HGNC:14888",
        "name": "DnaJ heat shock protein family (Hsp40) member B6",
        "frequency": "very-rare",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dnajb6"
      }
    ]
  }
}