Questions? Image: A friendly icon of a sleeping brain or EEG waveform. Contact info: [Your email/institution]

: Focuses on modern time-frequency analysis, offering a "lens" through which to see sleep as a continuous, dynamic process rather than just discrete stages. Content Highlights for Your PPT Physiology, Sleep Stages - StatPearls - NCBI Bookshelf

is a non-invasive test that measures and records the electrical activity of the brain using small metal discs (electrodes) attached to the scalp. Physiological Basis