Examples of our studies
Sensing the human
Other user interface studies
Engine signal processing
Health informatics standardisation
Secret company projects
Ancient web history
|Sleep signal analysis
Assessing the quality of sleep with digital signal processing
|Hypnogram of normal sleep indicating the sleep stages.
An adult should be sleeping 7-8 hours in a day
to maintain the full physical and intellectual capacity. Due to
various sleep disorders this is not always possible.
After a complaint about sleep problems to one's general practitioner (GP)
the GP sometimes sends the patient to a sleep clinic. Depending on the
case the sleep clinic may decide to perform either a full polysomnography
or a lighter version of sleep registration to the patient, either in the
clinic or in the patient's home. These sleep recordings produce many
hours of signals which are time consuming to analyze visually. It is here
that the sleep signal analysis comes to play trying to automate the
analysis to assist the medical personnel.
SSSAG has participated in several national and international sleep
signal analysis projects. The main focus has been in the analysis of
the brain activity (EEG) and the eye movement activity (using
electro-oculography, EOG) of the subjects not ignoring the other
polysomnographic signals. The studies have resulted in improved
methods of establishing the sleep profile, the detection of
eye movements, various EEG phenomena, arousals etc.
Michael Thorpy's sleep portal
Websciences International sleep portal
European Sleep Research Society