Gelastic cataplexy is a sudden loss of muscle tone without loss of consciousness triggered by laughter. It’s a characteristic sign of a rare genetic disease called Niemann Pick disease type C.

Oculopharyngeal muscular dystrophy (OPMD) is a rare inherited disorder that causes weakness in the eye and throat muscles. It may lead to drooping eyelids and swallowing difficulties. Muscular ...

Lambert-Eaton myasthenic syndrome (LEMS) causes the body to attack nerves, resulting in muscle weakness in the arms and legs. It often occurs due to underlying conditions such as small cell lung ...

Spastic hemiplegia is the most common type of cerebral palsy. This causes symptoms in one-half of their body — you might experience pain, muscle stiffness, and lack of muscle control. Share on ...

Infections and neurodegenerative diseases cause inflammation in the brain. But for unknown reasons, patients with brain inflammation often develop muscle problems that seem to be independent of the ...

Infectious or chronic diseases such as COVID-19, Alzheimer’s disease, and traumatic brain injury can cause inflammation in the brain, or neuroinflammation, that weakens muscles. While scientists are ...

Weakness in the legs can be a sign of serious health issues like stroke or cancer. Symptoms like sudden leg weakness, confusion, and dizziness may mean you need medical help right away. Exercise and ...

Research from Washington University School of Medicine in St. Louis reveals how brain inflammation triggers extreme muscle weakness across several diseases, including viral infection, bacterial ...

Tennis champion Monica Seles is speaking publicly for the first time about her battle with a rare, incurable muscle-weakening disease. Myasthenia gravis (MG) is a chronic neuromuscular disease that ...