{
  "url": "https://dantelabs.com/traits/neck-flexor-weakness",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "neck-flexor-weakness",
    "id": "HP:0003722",
    "name": "Neck flexion weakness",
    "label": "Neck flexor weakness",
    "definition": "Weakness of the muscles involved in neck flexion (sternocleidomastoid, longus capitus, longus colli, and scalenus anterior).",
    "synonyms": [
      "Neck flexor muscle weakness"
    ],
    "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": "neck-muscle-weakness",
        "name": "Neck muscle weakness",
        "url": "https://dantelabs.com/traits/neck-muscle-weakness"
      }
    ],
    "narrower": [],
    "genes": [
      {
        "slug": "acta1",
        "symbol": "ACTA1",
        "hgnc": "HGNC:129",
        "name": "actin alpha 1, skeletal muscle",
        "frequency": "obligate",
        "diseases": 3,
        "url": "https://dantelabs.com/genes/acta1"
      },
      {
        "slug": "cav3",
        "symbol": "CAV3",
        "hgnc": "HGNC:1529",
        "name": "caveolin 3",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cav3"
      },
      {
        "slug": "col6a2",
        "symbol": "COL6A2",
        "hgnc": "HGNC:2212",
        "name": "collagen type VI alpha 2 chain",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col6a2"
      },
      {
        "slug": "col6a3",
        "symbol": "COL6A3",
        "hgnc": "HGNC:2213",
        "name": "collagen type VI alpha 3 chain",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/col6a3"
      },
      {
        "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": "megf10",
        "symbol": "MEGF10",
        "hgnc": "HGNC:29634",
        "name": "multiple EGF like domains 10",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/megf10"
      },
      {
        "slug": "selenon",
        "symbol": "SELENON",
        "hgnc": "HGNC:15999",
        "name": "selenoprotein N",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/selenon"
      },
      {
        "slug": "top3a",
        "symbol": "TOP3A",
        "hgnc": "HGNC:11992",
        "name": "DNA topoisomerase III alpha",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/top3a"
      },
      {
        "slug": "cfl2",
        "symbol": "CFL2",
        "hgnc": "HGNC:1875",
        "name": "cofilin 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cfl2"
      },
      {
        "slug": "chchd10",
        "symbol": "CHCHD10",
        "hgnc": "HGNC:15559",
        "name": "coiled-coil-helix-coiled-coil-helix domain containing 10",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/chchd10"
      },
      {
        "slug": "gyg1",
        "symbol": "GYG1",
        "hgnc": "HGNC:4699",
        "name": "glycogenin 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gyg1"
      },
      {
        "slug": "klhl41",
        "symbol": "KLHL41",
        "hgnc": "HGNC:16905",
        "name": "kelch like family member 41",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/klhl41"
      },
      {
        "slug": "lmod3",
        "symbol": "LMOD3",
        "hgnc": "HGNC:6649",
        "name": "leiomodin 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/lmod3"
      },
      {
        "slug": "neb",
        "symbol": "NEB",
        "hgnc": "HGNC:7720",
        "name": "nebulin",
        "frequency": "frequent",
        "diseases": 3,
        "url": "https://dantelabs.com/genes/neb"
      },
      {
        "slug": "polg",
        "symbol": "POLG",
        "hgnc": "HGNC:9179",
        "name": "DNA polymerase gamma, catalytic subunit",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/polg"
      },
      {
        "slug": "tpm2",
        "symbol": "TPM2",
        "hgnc": "HGNC:12011",
        "name": "tropomyosin 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tpm2"
      },
      {
        "slug": "ttn",
        "symbol": "TTN",
        "hgnc": "HGNC:12403",
        "name": "titin",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/ttn"
      },
      {
        "slug": "als2",
        "symbol": "ALS2",
        "hgnc": "HGNC:443",
        "name": "alsin Rho guanine nucleotide exchange factor ALS2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/als2"
      },
      {
        "slug": "atp13a2",
        "symbol": "ATP13A2",
        "hgnc": "HGNC:30213",
        "name": "ATPase cation transporting 13A2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/atp13a2"
      },
      {
        "slug": "des",
        "symbol": "DES",
        "hgnc": "HGNC:2770",
        "name": "desmin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/des"
      },
      {
        "slug": "dysf",
        "symbol": "DYSF",
        "hgnc": "HGNC:3097",
        "name": "dysferlin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dysf"
      },
      {
        "slug": "erlin1",
        "symbol": "ERLIN1",
        "hgnc": "HGNC:16947",
        "name": "ER lipid raft associated 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/erlin1"
      },
      {
        "slug": "fus",
        "symbol": "FUS",
        "hgnc": "HGNC:4010",
        "name": "FUS RNA binding protein",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fus"
      },
      {
        "slug": "gne",
        "symbol": "GNE",
        "hgnc": "HGNC:23657",
        "name": "glucosamine (UDP-N-acetyl)-2-epimerase/N-acetylmannosamine kinase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gne"
      },
      {
        "slug": "lama2",
        "symbol": "LAMA2",
        "hgnc": "HGNC:6482",
        "name": "laminin subunit alpha 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/lama2"
      },
      {
        "slug": "myh7",
        "symbol": "MYH7",
        "hgnc": "HGNC:7577",
        "name": "myosin heavy chain 7",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/myh7"
      },
      {
        "slug": "rnaseh1",
        "symbol": "RNASEH1",
        "hgnc": "HGNC:18466",
        "name": "ribonuclease H1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnaseh1"
      },
      {
        "slug": "rrm2b",
        "symbol": "RRM2B",
        "hgnc": "HGNC:17296",
        "name": "ribonucleotide reductase regulatory TP53 inducible subunit M2B",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rrm2b"
      },
      {
        "slug": "sgcg",
        "symbol": "SGCG",
        "hgnc": "HGNC:10809",
        "name": "sarcoglycan gamma",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sgcg"
      },
      {
        "slug": "sigmar1",
        "symbol": "SIGMAR1",
        "hgnc": "HGNC:8157",
        "name": "sigma receptor chaperone 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sigmar1"
      },
      {
        "slug": "sord",
        "symbol": "SORD",
        "hgnc": "HGNC:11184",
        "name": "sorbitol dehydrogenase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sord"
      },
      {
        "slug": "spg11",
        "symbol": "SPG11",
        "hgnc": "HGNC:11226",
        "name": "SPG11 vesicle trafficking associated, spatacsin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/spg11"
      },
      {
        "slug": "sptlc1",
        "symbol": "SPTLC1",
        "hgnc": "HGNC:11277",
        "name": "serine palmitoyltransferase long chain base subunit 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sptlc1"
      },
      {
        "slug": "sptlc2",
        "symbol": "SPTLC2",
        "hgnc": "HGNC:11278",
        "name": "serine palmitoyltransferase long chain base subunit 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sptlc2"
      },
      {
        "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"
      },
      {
        "slug": "tardbp",
        "symbol": "TARDBP",
        "hgnc": "HGNC:11571",
        "name": "TAR DNA binding protein",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tardbp"
      },
      {
        "slug": "tnnt1",
        "symbol": "TNNT1",
        "hgnc": "HGNC:11948",
        "name": "troponin T1, slow skeletal type",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tnnt1"
      },
      {
        "slug": "trmt2b",
        "symbol": "TRMT2B",
        "hgnc": "HGNC:25748",
        "name": "tRNA methyltransferase 2B",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trmt2b"
      },
      {
        "slug": "ubqln2",
        "symbol": "UBQLN2",
        "hgnc": "HGNC:12509",
        "name": "ubiquilin 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ubqln2"
      },
      {
        "slug": "flnc",
        "symbol": "FLNC",
        "hgnc": "HGNC:3756",
        "name": "filamin C",
        "frequency": "very-rare",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/flnc"
      },
      {
        "slug": "cnbp",
        "symbol": "CNBP",
        "hgnc": "HGNC:13164",
        "name": "CCHC-type zinc finger nucleic acid binding protein",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cnbp"
      },
      {
        "slug": "kbtbd13",
        "symbol": "KBTBD13",
        "hgnc": "HGNC:37227",
        "name": "kelch repeat and BTB domain containing 13",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kbtbd13"
      },
      {
        "slug": "plin4",
        "symbol": "PLIN4",
        "hgnc": "HGNC:29393",
        "name": "perilipin 4",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/plin4"
      },
      {
        "slug": "trim32",
        "symbol": "TRIM32",
        "hgnc": "HGNC:16380",
        "name": "tripartite motif containing 32",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trim32"
      }
    ]
  }
}