{
  "url": "https://dantelabs.com/traits/square-wave-jerks",
  "trait": {
    "bundleId": "2026.10.16-c6eea6bf",
    "release": "2026-09-01",
    "slug": "square-wave-jerks",
    "id": "HP:0025402",
    "name": "Square-wave jerks",
    "definition": "Square wave jerks are saccadic eye movements which, when recorded with open eyes are considered to be a pathological sign, caused by fixation instability, and pointing to a central neurological lesion.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-the-eye",
        "name": "Abnormality of the eye",
        "url": "https://dantelabs.com/traits/abnormality-of-the-eye"
      }
    ],
    "broader": [
      {
        "slug": "saccadic-intrusion",
        "name": "Saccadic intrusion",
        "url": "https://dantelabs.com/traits/saccadic-intrusion"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "vps13a",
        "symbol": "VPS13A",
        "hgnc": "HGNC:1908",
        "name": "vacuolar protein sorting 13 homolog A",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/vps13a"
      },
      {
        "slug": "fxn",
        "symbol": "FXN",
        "hgnc": "HGNC:3951",
        "name": "frataxin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fxn"
      },
      {
        "slug": "syne1",
        "symbol": "SYNE1",
        "hgnc": "HGNC:17089",
        "name": "spectrin repeat containing nuclear envelope protein 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/syne1"
      }
    ]
  }
}