This discovery changes the way scientists think about aging. It suggests that part of what we call age-related weakness may actually be a communication problem between the brain and the muscles. As ...

Myasthenia gravis (MG) is a chronic autoimmune disorder that disrupts nerve-to-muscle signaling. This causes muscle weakness that varies in severity. Symptoms can be localized or more widespread.

The brain controls movement by sending electrical messages through nerves to the muscles. When this communication becomes weaker with age, the muscles may not respond with full strength even if they ...

In the winter, and between seasons many people report increased muscle and joint stiffness or pain. Changes in the temperature, barometric pressure, and humidity can contribute ...