Polysomnography is the name given to the measuring of various aspects of physiology in order to determine whether someone is asleep, and if they are, which stage of sleep they’re in. The term combines Greek and Latin words: poly, meaning “many” in Greek; and somnus, meaning “sleep” in Latin. In order to determine stage of sleep, we only need to combine three measurements: the electrical activity in the brain (EEG); eye movements (EOG); and muscle movements (EMG). Other measurements are needed for diagnosing sleep disorders, such as heart rhythm (ECG), respiration, and/or blood oxygen levels.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: