{
  "url": "https://dantelabs.com/traits/muscle-stiffness",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "muscle-stiffness",
    "id": "HP:0003552",
    "name": "Muscle stiffness",
    "definition": "A condition in which muscles cannot be moved quickly without accompanying pain or spasm.",
    "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-muscle-physiology",
        "name": "Issue with muscle function",
        "url": "https://dantelabs.com/traits/abnormal-muscle-physiology"
      }
    ],
    "narrower": [
      {
        "slug": "leg-muscle-stiffness",
        "name": "Leg muscle stiffness",
        "genes": 16,
        "url": "https://dantelabs.com/traits/leg-muscle-stiffness"
      },
      {
        "slug": "exercise-induced-muscle-stiffness",
        "name": "Exercise-induced muscle stiffness",
        "genes": 8,
        "url": "https://dantelabs.com/traits/exercise-induced-muscle-stiffness"
      },
      {
        "slug": "axial-muscle-stiffness",
        "name": "Axial muscle stiffness",
        "genes": 1,
        "url": "https://dantelabs.com/traits/axial-muscle-stiffness"
      }
    ],
    "genes": [
      {
        "slug": "glrb",
        "symbol": "GLRB",
        "hgnc": "HGNC:4329",
        "name": "glycine receptor beta",
        "frequency": "obligate",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/glrb"
      },
      {
        "slug": "hspg2",
        "symbol": "HSPG2",
        "hgnc": "HGNC:5273",
        "name": "heparan sulfate proteoglycan 2",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/hspg2"
      },
      {
        "slug": "kpna3",
        "symbol": "KPNA3",
        "hgnc": "HGNC:6396",
        "name": "karyopherin subunit alpha 3",
        "frequency": "obligate",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kpna3"
      },
      {
        "slug": "scn4a",
        "symbol": "SCN4A",
        "hgnc": "HGNC:10591",
        "name": "sodium voltage-gated channel alpha subunit 4",
        "frequency": "obligate",
        "diseases": 4,
        "url": "https://dantelabs.com/genes/scn4a"
      },
      {
        "slug": "arx",
        "symbol": "ARX",
        "hgnc": "HGNC:18060",
        "name": "aristaless related homeobox",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/arx"
      },
      {
        "slug": "atad1",
        "symbol": "ATAD1",
        "hgnc": "HGNC:25903",
        "name": "ATPase family AAA domain containing 1",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/atad1"
      },
      {
        "slug": "clcn1",
        "symbol": "CLCN1",
        "hgnc": "HGNC:2019",
        "name": "chloride voltage-gated channel 1",
        "frequency": "very-frequent",
        "diseases": 3,
        "url": "https://dantelabs.com/genes/clcn1"
      },
      {
        "slug": "dhcr24",
        "symbol": "DHCR24",
        "hgnc": "HGNC:2859",
        "name": "24-dehydrocholesterol reductase",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dhcr24"
      },
      {
        "slug": "glra1",
        "symbol": "GLRA1",
        "hgnc": "HGNC:4326",
        "name": "glycine receptor alpha 1",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/glra1"
      },
      {
        "slug": "gphn",
        "symbol": "GPHN",
        "hgnc": "HGNC:15465",
        "name": "gephyrin",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gphn"
      },
      {
        "slug": "rnu4atac",
        "symbol": "RNU4ATAC",
        "hgnc": "HGNC:34016",
        "name": "RNA, U4atac small nuclear",
        "frequency": "very-frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnu4atac"
      },
      {
        "slug": "slc6a5",
        "symbol": "SLC6A5",
        "hgnc": "HGNC:11051",
        "name": "solute carrier family 6 member 5",
        "frequency": "very-frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/slc6a5"
      },
      {
        "slug": "acta1",
        "symbol": "ACTA1",
        "hgnc": "HGNC:129",
        "name": "actin alpha 1, skeletal muscle",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/acta1"
      },
      {
        "slug": "ano5",
        "symbol": "ANO5",
        "hgnc": "HGNC:27337",
        "name": "anoctamin 5",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ano5"
      },
      {
        "slug": "cacna1s",
        "symbol": "CACNA1S",
        "hgnc": "HGNC:1397",
        "name": "calcium voltage-gated channel subunit alpha1 S",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/cacna1s"
      },
      {
        "slug": "cavin1",
        "symbol": "CAVIN1",
        "hgnc": "HGNC:9688",
        "name": "caveolae associated protein 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cavin1"
      },
      {
        "slug": "cnbp",
        "symbol": "CNBP",
        "hgnc": "HGNC:13164",
        "name": "CCHC-type zinc finger nucleic acid binding protein",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cnbp"
      },
      {
        "slug": "fgfr1",
        "symbol": "FGFR1",
        "hgnc": "HGNC:3688",
        "name": "fibroblast growth factor receptor 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/fgfr1"
      },
      {
        "slug": "gabra3",
        "symbol": "GABRA3",
        "hgnc": "HGNC:4077",
        "name": "gamma-aminobutyric acid type A receptor subunit alpha3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/gabra3"
      },
      {
        "slug": "kat6a",
        "symbol": "KAT6A",
        "hgnc": "HGNC:13013",
        "name": "lysine acetyltransferase 6A",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kat6a"
      },
      {
        "slug": "kbtbd13",
        "symbol": "KBTBD13",
        "hgnc": "HGNC:37227",
        "name": "kelch repeat and BTB domain containing 13",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/kbtbd13"
      },
      {
        "slug": "kcna1",
        "symbol": "KCNA1",
        "hgnc": "HGNC:6218",
        "name": "potassium voltage-gated channel subfamily A member 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kcna1"
      },
      {
        "slug": "kcnj18",
        "symbol": "KCNJ18",
        "hgnc": "HGNC:39080",
        "name": "potassium inwardly rectifying channel subfamily J member 18",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kcnj18"
      },
      {
        "slug": "klhl41",
        "symbol": "KLHL41",
        "hgnc": "HGNC:16905",
        "name": "kelch like family member 41",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/klhl41"
      },
      {
        "slug": "kras",
        "symbol": "KRAS",
        "hgnc": "HGNC:6407",
        "name": "KRas proto-oncogene, GTPase",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kras"
      },
      {
        "slug": "myot",
        "symbol": "MYOT",
        "hgnc": "HGNC:12399",
        "name": "myotilin",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/myot"
      },
      {
        "slug": "mypn",
        "symbol": "MYPN",
        "hgnc": "HGNC:23246",
        "name": "myopalladin",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/mypn"
      },
      {
        "slug": "neb",
        "symbol": "NEB",
        "hgnc": "HGNC:7720",
        "name": "nebulin",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/neb"
      },
      {
        "slug": "pank2",
        "symbol": "PANK2",
        "hgnc": "HGNC:15894",
        "name": "pantothenate kinase 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/pank2"
      },
      {
        "slug": "prkar1b",
        "symbol": "PRKAR1B",
        "hgnc": "HGNC:9390",
        "name": "protein kinase cAMP-dependent type I regulatory subunit beta",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/prkar1b"
      },
      {
        "slug": "reep2",
        "symbol": "REEP2",
        "hgnc": "HGNC:17975",
        "name": "receptor accessory protein 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/reep2"
      },
      {
        "slug": "ryr1",
        "symbol": "RYR1",
        "hgnc": "HGNC:10483",
        "name": "ryanodine receptor 1",
        "frequency": "frequent",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/ryr1"
      },
      {
        "slug": "sil1",
        "symbol": "SIL1",
        "hgnc": "HGNC:24624",
        "name": "SIL1 nucleotide exchange factor",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/sil1"
      },
      {
        "slug": "slc2a1",
        "symbol": "SLC2A1",
        "hgnc": "HGNC:11005",
        "name": "solute carrier family 2 member 1",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/slc2a1"
      },
      {
        "slug": "spg7",
        "symbol": "SPG7",
        "hgnc": "HGNC:11237",
        "name": "SPG7 matrix AAA peptidase subunit, paraplegin",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/spg7"
      },
      {
        "slug": "tpm2",
        "symbol": "TPM2",
        "hgnc": "HGNC:12011",
        "name": "tropomyosin 2",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tpm2"
      },
      {
        "slug": "tpm3",
        "symbol": "TPM3",
        "hgnc": "HGNC:12012",
        "name": "tropomyosin 3",
        "frequency": "frequent",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tpm3"
      },
      {
        "slug": "adar",
        "symbol": "ADAR",
        "hgnc": "HGNC:225",
        "name": "adenosine deaminase RNA specific",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/adar"
      },
      {
        "slug": "aopep",
        "symbol": "AOPEP",
        "hgnc": "HGNC:1361",
        "name": "aminopeptidase O (putative)",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/aopep"
      },
      {
        "slug": "cryab",
        "symbol": "CRYAB",
        "hgnc": "HGNC:2389",
        "name": "crystallin alpha B",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cryab"
      },
      {
        "slug": "galc",
        "symbol": "GALC",
        "hgnc": "HGNC:4115",
        "name": "galactosylceramidase",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/galc"
      },
      {
        "slug": "hint1",
        "symbol": "HINT1",
        "hgnc": "HGNC:4912",
        "name": "histidine triad nucleotide binding protein 1",
        "frequency": "occasional",
        "diseases": 2,
        "url": "https://dantelabs.com/genes/hint1"
      },
      {
        "slug": "ifih1",
        "symbol": "IFIH1",
        "hgnc": "HGNC:18873",
        "name": "interferon induced with helicase C domain 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ifih1"
      },
      {
        "slug": "kif11",
        "symbol": "KIF11",
        "hgnc": "HGNC:6388",
        "name": "kinesin family member 11",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/kif11"
      },
      {
        "slug": "lsm11",
        "symbol": "LSM11",
        "hgnc": "HGNC:30860",
        "name": "LSM11, U7 small nuclear RNA associated",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/lsm11"
      },
      {
        "slug": "myo5a",
        "symbol": "MYO5A",
        "hgnc": "HGNC:7602",
        "name": "myosin VA",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/myo5a"
      },
      {
        "slug": "polg",
        "symbol": "POLG",
        "hgnc": "HGNC:9179",
        "name": "DNA polymerase gamma, catalytic subunit",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/polg"
      },
      {
        "slug": "psap",
        "symbol": "PSAP",
        "hgnc": "HGNC:9498",
        "name": "prosaposin",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/psap"
      },
      {
        "slug": "rnaseh2a",
        "symbol": "RNASEH2A",
        "hgnc": "HGNC:18518",
        "name": "ribonuclease H2 subunit A",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnaseh2a"
      },
      {
        "slug": "rnaseh2b",
        "symbol": "RNASEH2B",
        "hgnc": "HGNC:25671",
        "name": "ribonuclease H2 subunit B",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnaseh2b"
      },
      {
        "slug": "rnaseh2c",
        "symbol": "RNASEH2C",
        "hgnc": "HGNC:24116",
        "name": "ribonuclease H2 subunit C",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnaseh2c"
      },
      {
        "slug": "rnu7-1",
        "symbol": "RNU7-1",
        "hgnc": "HGNC:34033",
        "name": "RNA, U7 small nuclear 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rnu7-1"
      },
      {
        "slug": "rrm1",
        "symbol": "RRM1",
        "hgnc": "HGNC:10451",
        "name": "ribonucleotide reductase catalytic subunit M1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/rrm1"
      },
      {
        "slug": "samhd1",
        "symbol": "SAMHD1",
        "hgnc": "HGNC:15925",
        "name": "SAM and HD domain containing deoxynucleoside triphosphate triphosphohydrolase 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/samhd1"
      },
      {
        "slug": "tk2",
        "symbol": "TK2",
        "hgnc": "HGNC:11831",
        "name": "thymidine kinase 2",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tk2"
      },
      {
        "slug": "top3a",
        "symbol": "TOP3A",
        "hgnc": "HGNC:11992",
        "name": "DNA topoisomerase III alpha",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/top3a"
      },
      {
        "slug": "trex1",
        "symbol": "TREX1",
        "hgnc": "HGNC:12269",
        "name": "three prime repair exonuclease 1",
        "frequency": "occasional",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/trex1"
      },
      {
        "slug": "acadvl",
        "symbol": "ACADVL",
        "hgnc": "HGNC:92",
        "name": "acyl-CoA dehydrogenase very long chain",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/acadvl"
      },
      {
        "slug": "cpt2",
        "symbol": "CPT2",
        "hgnc": "HGNC:2330",
        "name": "carnitine palmitoyltransferase 2",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/cpt2"
      },
      {
        "slug": "dysf",
        "symbol": "DYSF",
        "hgnc": "HGNC:3097",
        "name": "dysferlin",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/dysf"
      },
      {
        "slug": "ldha",
        "symbol": "LDHA",
        "hgnc": "HGNC:6535",
        "name": "lactate dehydrogenase A",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/ldha"
      },
      {
        "slug": "stim1",
        "symbol": "STIM1",
        "hgnc": "HGNC:11386",
        "name": "stromal interaction molecule 1",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/stim1"
      },
      {
        "slug": "tnfrsf1a",
        "symbol": "TNFRSF1A",
        "hgnc": "HGNC:11916",
        "name": "TNF receptor superfamily member 1A",
        "diseases": 1,
        "url": "https://dantelabs.com/genes/tnfrsf1a"
      }
    ]
  }
}