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The researchers recorded one night of sleep using polysomnography, a diagnostic test that measures various body functions, such as brain waves and heart rate during sleep, using sensors placed throughout the body.

Using sound to stimulate certain brain waves has the potential to help those with dementia or cognitive decline sleep better, reveals a new study.

Using various methods for measuring brain waves and brain activity as well as psychological tests, they found specific changes that also occur in patients, so-called intermediate phenotypes of mental disorders.

Scientists at Northwestern University are studying how short pulses of pink noise can enhance the slow brain waves of deep sleep.

Biomedical engineer Annabelle Singer has spent the past decade developing a noninvasive therapy for Alzheimer's disease that uses flickering lights and rhythmic tones to modulate brain waves.