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Actigraphy

Collected & Prepared By Nevin F.W. Zaki Lecturer at the Dept.of Psychiatry Mansoura university. Actigraphy. References. “Ambulatory monitoring of sleep disorders". Russo et al 2010. Practice parameters of the American Academy of sleep medicine. Target Goal.

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Actigraphy

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  1. Collected & Prepared By Nevin F.W. ZakiLecturer at the Dept.of Psychiatry Mansoura university Actigraphy

  2. References “Ambulatory monitoring of sleep disorders". Russo et al 2010. Practice parameters of the American Academy of sleep medicine

  3. Target Goal Audience will get to know actigraphy • Technique • Uses • What does it record • Pros &Cons • Practice parameters

  4. Definition Application of accelerometers using miniature motion sensors to study the macro and micro activities associated with human motion has been termed actigraphy.

  5. Methodology of use • How is it worn • Where • What does it record • Where does the data go.

  6. USES It is used to clinically evaluate: • Insomnia • Circadian rhythm sleep disorders • Excessive sleepiness • Restless leg syndrome

  7. History Since its conception in 1920s, actigraphy was developed to objectively measure and quantify sleep patterns based on body movements.

  8. Hx continued wrist-mounted accelerometry was developed in the 1970s and 1980s at the Walter Reed Army Institute of Research (AIR) and the National Institutes of Health (NIH

  9. HX continued Sadeh and colleagues concluded that actigraphy provided useful information and that it may be a "cost-effective method for assessing specific sleep disorders but methodological issues have not been systematically addressed in clinical research and practice".

  10. Technological parameters Fastest sample rate Amount of memory Battery usage Weight: Water resistance: User input: Subjective user input

  11. Pros Cons • In comparison with PSG, a technical difficulty • Less reliable than PSG for detecting sleep as sleep became more disturbed • Less reliable for measuring sleep offset or sleep efficiency • Valid for assessing sleep durations and sleep/wake activity • Utility in adult and , adolescent, geriatric patients Observationsstudies in comparison to actigraphy yielded a high reliability

  12. Pros Cons • Artifacts,recording standardized?? • Sensitivity to differentiate between sleep and movementless moments • Underestimate leg EMG activity • Compared to traditional PSG, actigraphy records for multiple days and nights • Actigraphy facilitate sleep assessment at home

  13. Pros cons • In comparison to PSG, it lacks sensitivity to detect sleep quality and sleep stages, specifically cannot delineate arousals • There exist discrepancies in data on sleep latency, number and duration of night awakenings or number of naps when compared to sleep log analysis • actigraphy can be a useful follow-up mean to intervention studies. • Valid marker of entrained endogenous circadian phase • Ability to detect Periodic leg movements (PLMs) • Utility for assessment during extended clinical trials

  14. SCORING 1.A number of scoring programs have been developed, with different algorithms for discriminating sleep from. 2.Some of these algorithms have been validated against polysomnographic 3.The number of scoring programs and the number of variables continues to increase, resulting in the proliferation of variables that have no demonstrable validity or reliability yet are automatically generated when the scoring program is run.

  15. Sleep analysis window

  16. Circadian rhythm parameters IS IV L5 L5 onset M10 M10 onset Amplitude Rel .Amp

  17. NPCRA

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