Polysomnogram
A polysomnogram (PSG) is an overnight sleep study in which the patient is monitored for sleep disorders.
Equipment is attached to the patient to monitor brain activity and the stages of sleep as well as all respiratory activity during sleep.
PSG is commonly used to diagnose conditions such as sleep apnea and other sleep disordered breathing. It can also be used to diagnose nocturnal seizures or spasms, periodic limb movements, sleepwalking, night terrors and rapid eye movement disorders.
MSLT
The MSLT (Multiple Sleep Latency Test) is used to diagnose excessive daytime sleepiness by measuring how quickly an individual falls asleep in a quiet, dark environment during the day. The MSLT is also the standard tool used to determine whether or not an individual suffers from excessive daytime sleepiness due to narcolepsy or hypersomnia.
The MSLT consists of five scheduled naps that are separated by two-hour breaks. A series of sensors will be used to measure whether the individual is sleeping, as well as to determine the stage of sleep.
