While a gradual loss in muscle strength is a natural part of aging, for many older adults it's more than just feeling a little weaker. Sarcopenia—a condition affecting nearly half of adults over ...

Dear Dr. Donohue: My aunt died about 20 years ago. I have been told the cause of her death was myasthenia gravis. Will you please answer some questions about it? What are the early symptoms? How is it ...

Francisco J. Rivera Rosario is a science communications editor experienced in developing all types of science content including, scientific journal articles, infographics, medical educational videos, ...

Ocular myasthenia gravis is an autoimmune condition affecting the muscles surrounding and involving the eyes. Symptoms can include double vision, droopy eyelids, and more. Ocular myasthenia gravis ...

Poorly functioning blood vessels lead to the characteristic muscle weakness that so many cancer patients experience. Artur Plawgo/Science Photo Library via Getty Images Tumors can destroy the blood ...

The joints in your body are enveloped by muscles that coordinate their movements. These muscle groups counterbalance each other and work together to complete a movement. The muscles on either side of ...