{
  "url": "https://dantelabs.com/traits/limited-neck-flexion",
  "trait": {
    "bundleId": "2026.10.19-9814e911",
    "release": "2026-09-01",
    "slug": "limited-neck-flexion",
    "id": "HP:0005991",
    "name": "Limited neck flexibility",
    "label": "Limited neck flexion",
    "definition": "Reduced ability to lower the chin towards the chest by bending the neck.",
    "synonyms": [
      "Limited cervical flexion"
    ],
    "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": "fhl1",
        "symbol": "FHL1",
        "hgnc": "HGNC:3702",
        "name": "four and a half LIM domains 1",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fhl1"
      },
      {
        "slug": "hspb8",
        "symbol": "HSPB8",
        "hgnc": "HGNC:30171",
        "name": "heat shock protein family B (small) member 8",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hspb8"
      },
      {
        "slug": "myh7",
        "symbol": "MYH7",
        "hgnc": "HGNC:7577",
        "name": "myosin heavy chain 7",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/myh7"
      },
      {
        "slug": "selenon",
        "symbol": "SELENON",
        "hgnc": "HGNC:15999",
        "name": "selenoprotein N",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/selenon"
      },
      {
        "slug": "ttn",
        "symbol": "TTN",
        "hgnc": "HGNC:12403",
        "name": "titin",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ttn"
      }
    ]
  }
}