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Drug addiction
Drug addiction, or substance dependence is the compulsive use of psychoactive drugs, to the point where the user has no effective choice but to continue use. Drug addiction has two components: ... > more -
Developmental Biology
Human Biology
Nervous System
Healthy Aging
Diseases and Conditions
Attention Deficit Disorder
Nervous system
The nervous system of an animal coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions. The nervous system of vertebrate ... > more -
Mad Cow Disease
Healthy Aging
Diseases and Conditions
Disorders and Syndromes
Sports Medicine
Chronic Illness
Transmissible spongiform encephalopathy
Transmissible spongiform encephalopathies (TSEs, also known as prion diseases) are a group of progressive conditions that affect the brain and nervous system of humans and animals and are transmitted ... > more -
Back and Neck Pain
Children's Health
Staying Healthy
Psychology Research
Diseases and Conditions
Elder Care
Separation anxiety disorder
Separation anxiety disorder (or simply separation anxiety) is a psychological condition in which an individual has excessive anxiety regarding separation from home or from people to whom the ... > more -
Circadian rhythm
A circadian rhythm is a roughly 24 hour cycle in the physiological processes of living beings, including plants, animals, fungi and cyanobacteria. In a strict sense, circadian rhythms are ... > more -
Clinical depression
Clinical depression is a state of sadness or melancholia that has advanced to the point of being disruptive to an individual's social functioning and/or activities of daily living. The diagnosis may ... > more
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