Rheumatoid arthritis affects various parts of the body beyond the joints, including the skin, eyes, lungs, heart, and even the brain. In the bones and joints, it can cause pain, swelling, bone damage, ...

“I view affect as the primary innate biological motivating mechanism, more urgent than drive, deprivation, and pleasure, and more urgent even than physical pain ...

Untreated clinical depression is a serious problem. Untreated depression increases the chance of risky behaviors such as drug or alcohol addiction. It also can ruin relationships, cause problems at ...

High blood glucose levels from diabetes can damage blood vessels and nerves throughout the body, leading to complications like heart disease, stroke, kidney disease, vision loss, and neuropathy.

Multiple sclerosis causes a breakdown of the protective cover around nerves in the brain and spinal cord. This can affect various body systems, resulting in difficulties with thinking, vision, mood, ...

Heavy use of MDMA (ecstasy) may lead to long-term changes in your brain’s serotonin system — but there’s a lot we still don’t know. MDMA, also known as ecstasy or Molly, is a synthetic psychoactive ...

“The critical point is that the human being has evolved as a multimechanism system in which each mechanism is at once incomplete but essential to the functioning of the system as a whole.” –Silvan S.