Attention deficit hyperactivity disorder (ADHD) should be diagnosed and treated in children as young as age 4, according to new guidelines from the American Academy of Pediatrics. Skip to main content
ephemeris. 1  a table showing the positions of a heavenly body on a number of dates in a regular sequence. 2  an astronomical almanac containing such tables. 3  Archaic. an almanac or calendar.
The endocannabinoid system (ECS) is a set of signaling molecules in the central and peripheral nervous system that helps regulate processes of the body such as appetite, pain, mood, and memory. A signaling molecule is a chemical that passes information from cell to cell.