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Presentation on theme: "Contact Details Or"— Presentation transcript:

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3 Contact Details nevinfzaki@yahoo.com Or nevinnevin33@googlemail.com

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

6 Audience will get to know actigraphy  Technique  Uses  What does it record  Pros &Cons  Practice parameters

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

8  How is it worn  Where  What does it record  Where does the data go.

9 It is used to clinically evaluate:  Insomnia  Circadian rhythm sleep disorders  Excessive sleepiness  Restless leg syndrome

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

11 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

12 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".

13 Fastest sample rate Amount of memory Battery usage Weight: Water resistance: User input: Subjective user input

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18  Valid for assessing sleep durations and sleep/wake activity  Utility in adult and, adolescent, geriatric patients Observations studies in comparison to actigraphy yielded a high reliability  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

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

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

21 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.

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32 IS IV L5 L5 onset M10 M10 onset Amplitude Rel.Amp 32