Sleep Studies

Beginning around 1980 AMI pioneered the application of Actigraphy in sleep research, in 1995 the American Sleep Disorders Association determined Actigraphy a useful adjunct tool in the study and clinical assessment of sleep disorders. AMI Motionlogger Actigraph Systems have been widely cited and used by hospital and laboratory facilities to study sleep/wake patterns, of subjects in their natural environment. Hundreds of articles appear in the literature -- some of which are cited in this web site and complete bibliography is available upon request.

A wide range of models and features make AMI’s Motionlogger the most versatile instrument of choice in actigraphic monitoring. Our superior analysis software (compatible ONLY with our Motionlogger actigraphs) contains several sleep algorithms, with high correlations to polysomnographic measurements, for estimation of sleep quality, quantity, and circadian phasing.

Sleep-Disordered Breathing:
AMI has pioneered the inductive plethysmograph since the 1970’s in collaboration with Dr. Frank Stott of Oxford, U.K. Uncalibrated inductive plethysmography is the accepted method to identify respiratory patterns during sleep. (Refs.) Efforts to identify arousals as a result of respiratory disturbances have been successful by the use of the Motionlogger Actigraph instruments, in particular the telemeter aspect of actigraphy. These instrumental units telemeter motor activity over 20 yards of distance with high fidelity. The recognition of number of arousals per hour is a significant aid in medical management. The 2MB memory of our Octagonal Motionloggers allows for long-term, 10-second epoch length data collection.

Daytime Sleepiness:
The PVT-192 Psychomotor Vigilance Task Monitor can document and store decrements in reaction time/performance.