Actigraphy, Actigraph Watch

  • Definitions
  1. Actigraphy
    1. Accelerometer monitors patients overnight movement
    2. Calculates actual patient sleep time
    3. Calculates limb movements over time
  • Technique
  1. Patient wears a sensor on their wrist or ankle overnight for days to weeks
  2. Device measures frequency and degree of limb movements over time
  • Interpretation
  1. Sleep Phases
  2. Sleep Latency
  3. Sleep Duration
  4. Sleep Patterns
  5. Sleep Efficiency (see Cognitive Behavioral Therapy for Insomnia)