{
  "url": "https://dantelabs.com/traits/excessive-sleep",
  "trait": {
    "bundleId": "2026.10.17-8666dff2",
    "release": "2026-09-01",
    "slug": "excessive-sleep",
    "id": "HP:0025288",
    "name": "Excessive sleep",
    "definition": "A clinical phenomenon characterized by sleeping longer than what is typical or necessary for a person's age and context, or by recurrent episodes of sleep that intrude upon the waking hours. Excessive sleep is identified through self-reports or observations and may involve prolonged nighttime sleep, frequent daytime naps, or episodes of unintentional sleep.",
    "synonyms": [
      "Prolonged sleep duration",
      "Sleeping too much"
    ],
    "systems": [
      {
        "slug": "abnormality-of-the-nervous-system",
        "name": "Abnormality of the nervous system",
        "url": "https://dantelabs.com/traits/abnormality-of-the-nervous-system"
      }
    ],
    "broader": [
      {
        "slug": "sleep-disturbance",
        "name": "Difficulty sleeping",
        "url": "https://dantelabs.com/traits/sleep-disturbance"
      }
    ],
    "narrower": [
      {
        "slug": "sleep-attack",
        "name": "Sleep attack",
        "genes": 1,
        "url": "https://dantelabs.com/traits/sleep-attack"
      }
    ],
    "genes": []
  }
}