{
  "annotation_id": "21f2cb89-4e3d-454d-9928-dd4769d28f5c",
  "date_created": "2026-03-02T18:00:43.478000Z",
  "date_modified": "2026-03-02T18:00:43.478000Z",
  "file_hash": "e2f4af1fdb02deb2111f01d52904aa08f296a857c8815c6c0023e625af066ace",
  "private": false,
  "record": {
    "abstract": "We study the middle cerebral artery blood flow velocity (MCAfv) in humans\nusing transcranial Doppler ultrasonography (TCD). Scaling properties of time\nseries of the axial flow velocity averaged over a cardiac beat interval may be\ncharacterized by two exponents. The short time scaling exponent (STSE)\ndetermines the statistical properties of fluctuations of blood flow velocities\nin short-time intervals while the Hurst exponent describes the long-term\nfractal properties. In many migraineurs the value of the STSE is significantly\nreduced and may approach that of the Hurst exponent. This change in dynamical\nproperties reflects the significant loss of short-term adaptability and the\noverall hyperexcitability of the underlying cerebral blood flow control system.\nWe call this effect fractal rigidity.",
    "arxiv_id": "physics/0301055",
    "authors": [
      "Miroslaw Latka",
      "Marta Glaubic-Latka",
      "Dariusz Latka",
      "Bruce J. West"
    ],
    "categories": [
      "physics.bio-ph",
      "physics.med-ph",
      "q-bio"
    ],
    "doi": "10.1016/S0960-0779(03)00440-5",
    "title": "Fractal Rigidity in Migraine",
    "url": "https://arxiv.org/abs/physics/0301055"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2d07cba2-aa88-45cb-984e-ffbe977f3c7f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}