{
  "url": "https://dantelabs.com/traits/nuchal-rigidity",
  "trait": {
    "bundleId": "2026.10.16-c6eea6bf",
    "release": "2026-09-01",
    "slug": "nuchal-rigidity",
    "id": "HP:0031179",
    "name": "Nuchal rigidity",
    "definition": "Resistance of the extensor muscles of the neck to being bent forwards (i.e., impaired neck flexion) as a result of muscle spasm of the extensor muscles of the neck. Nuchal rigidity is not a fixed rigidity. Nuchal rigidity has been used as a bedside test for meningism, although its sensitivity for this purpose has been debated.",
    "synonyms": [],
    "systems": [
      {
        "slug": "abnormality-of-head-or-neck",
        "name": "Abnormality of head or neck",
        "url": "https://dantelabs.com/traits/abnormality-of-head-or-neck"
      }
    ],
    "broader": [
      {
        "slug": "limitation-of-neck-motion",
        "name": "Limitation of neck motion",
        "url": "https://dantelabs.com/traits/limitation-of-neck-motion"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "fas",
        "symbol": "FAS",
        "hgnc": "HGNC:11920",
        "name": "Fas cell surface death receptor",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fas"
      },
      {
        "slug": "hla-drb1",
        "symbol": "HLA-DRB1",
        "hgnc": "HGNC:4948",
        "name": "major histocompatibility complex, class II, DR beta 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hla-drb1"
      },
      {
        "slug": "irf3",
        "symbol": "IRF3",
        "hgnc": "HGNC:6118",
        "name": "interferon regulatory factor 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/irf3"
      },
      {
        "slug": "ptpn22",
        "symbol": "PTPN22",
        "hgnc": "HGNC:9652",
        "name": "protein tyrosine phosphatase non-receptor type 22",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ptpn22"
      },
      {
        "slug": "tbk1",
        "symbol": "TBK1",
        "hgnc": "HGNC:11584",
        "name": "TANK binding kinase 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tbk1"
      },
      {
        "slug": "ticam1",
        "symbol": "TICAM1",
        "hgnc": "HGNC:18348",
        "name": "TIR domain containing adaptor molecule 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ticam1"
      },
      {
        "slug": "tlr3",
        "symbol": "TLR3",
        "hgnc": "HGNC:11849",
        "name": "toll like receptor 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tlr3"
      },
      {
        "slug": "traf3",
        "symbol": "TRAF3",
        "hgnc": "HGNC:12033",
        "name": "TNF receptor associated factor 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/traf3"
      },
      {
        "slug": "unc93b1",
        "symbol": "UNC93B1",
        "hgnc": "HGNC:13481",
        "name": "unc-93B1 regulator of TLR signaling",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/unc93b1"
      },
      {
        "slug": "atp1a2",
        "symbol": "ATP1A2",
        "hgnc": "HGNC:800",
        "name": "ATPase Na+/K+ transporting subunit alpha 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/atp1a2"
      },
      {
        "slug": "cacna1a",
        "symbol": "CACNA1A",
        "hgnc": "HGNC:1388",
        "name": "calcium voltage-gated channel subunit alpha1 A",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cacna1a"
      },
      {
        "slug": "prrt2",
        "symbol": "PRRT2",
        "hgnc": "HGNC:30500",
        "name": "proline rich transmembrane protein 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/prrt2"
      },
      {
        "slug": "scn1a",
        "symbol": "SCN1A",
        "hgnc": "HGNC:10585",
        "name": "sodium voltage-gated channel alpha subunit 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/scn1a"
      }
    ]
  }
}