The term "alert and oriented" (AO) is a medical notation describing a person's level of consciousness and cognition (the ability to understand and learn through thought, experiences, and the senses).

The hypothalamus is a tiny part of the brain that controls sleep. It acts like a clock, telling us when to sleep and wake. Tap to read in detail.

The testes, or testicles, are two egg-shaped sex organs that play an important role in the male reproductive system. The testes are where sperm cells are produced and are also responsible for the ...

Our brain’s hypothalamus has a “master clock ... This master clock turns on a tiny structure in our brains, called the pineal gland, to release more of a sleep-inducing chemical called ...

We used 7 Tesla functional magnetic resonance imaging to assess the impact of variations in light illuminance on the regional activity of the hypothalamus while healthy young adults (N=26; 16 women; ...