Actigraphy
A sleep actigraph is a device that are worn by patients in different ways, depending on the data being collected. Wikipedia describes a version worn on the upper, dominant arm. Other versions are available, to be worn on the patient’s non-dominant wrist, like a watch (see Morin, 77).
Such devices have been used in sleep research since the 1990’s to record a patient’s activity level throughout the day. Recently, some people have gotten their own to chart their daily activity level. A machines of this type can be downloaded to a personal computer and provide daily graphs of activity.
It has several advantages over other records. It records actual patient activity, unlike a sleep record, which is self-report. It continues throughout the day in the person’s everyday life, unlike a polysomnography. And it is less expensive to buy and use than a polysomnography.
Side-by side comparisons of various models are reported in SleepReviewmag.com for December 2013.
Multiple Sleep Latency Test (MSLT)
See copy from Wikipedia
Electroencephalogram (EEG)
Electromyography (EMG)
This is a technique for evaluating the electrical potential in skeletal muscles, and provides information about their activation. It can be used to infer a person’s different stages of sleep. A rather technical discussion appears in Wikipedia.
Electrooculography (EOG/E.O.G.)
This is a technique for measuring and recording eye movement. It helps distinguish REM from NREM sleep in the sleep lab. A discussion appears in Wikipedia.
Polysomnography (PSG)
(Morin, p.19f, download from wikipedia)
Switch Activated Clock
(Morin, p. 78)<