{
  "url": "https://dantelabs.com/traits/firm-muscles",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "firm-muscles",
    "id": "HP:0003725",
    "name": "Firm muscles",
    "definition": "A state of increased firmness (i.e., a reduced tendency to yield to pressure) of skeletal muscle tissue. This finding is ascertained by palpation and is to be distinguished from increased muscle tone (abnormal elevation in the resting tension of a muscle, leading to stiffness and resistance to movement).",
    "synonyms": [],
    "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": "abnormal-skeletal-muscle-morphology",
        "name": "Abnormally shaped muscle",
        "url": "https://dantelabs.com/traits/abnormal-skeletal-muscle-morphology"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "gaa",
        "symbol": "GAA",
        "hgnc": "HGNC:4065",
        "name": "alpha glucosidase",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gaa"
      },
      {
        "slug": "piezo2",
        "symbol": "PIEZO2",
        "hgnc": "HGNC:26270",
        "name": "piezo type mechanosensitive ion channel component 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/piezo2"
      }
    ]
  }
}