Singer Céline Dion was recently diagnosed with a rare neurological disorder called stiff-person syndrome, which has caused her to experience severe muscle spasms, the iconic performer announced Dec. 8 ...

Spastic cerebral palsy is a disorder that involves muscle stiffness. Symptoms and signs may include difficulty walking, trouble manipulating objects, and vision, hearing, or speech challenges.

We've all been there before. Running along the basketball court or swimming across the pool, when, all of a sudden, we experience a sharp pain in our foot or leg. Muscle cramps are common, affect ...

Symptoms of spasticity — including chronic muscle stiffness, pain, and jerkiness of voluntary movements — can interfere with your daily activities. Left untreated, these symptoms may significantly ...

Stiff person syndrome (also known as SPS, Moersch-Woltman syndrome, and stiff man syndrome) is a very rare condition that can cause your muscles to become rigid or spasm. This is a progressive ...

Dystonia is a neurological disorder causing involuntary muscle contractions and abnormal postures. Botulinum toxin (e.g., Botox) is the gold-standard, first-line treatment for focal dystonias, which ...

Though many people experience muscle twitching, it's often incorrectly identified as a muscle spasm. While both are involuntary contractions of a muscle, muscle spasms and muscle twitching aren't ...

Muscle relaxers help reduce muscle stiffness and pain from conditions like cerebral palsy and lower back pain. There are two main types of muscle relaxers: antispastics and antispasmodics. Muscle ...

Panel A shows the microscopic myoarchitecture of the circular and longitudinal muscle layers of the lower esophageal sphincter and stomach. The circular muscle fibers of the esophagus cross each other ...

Being diagnosed with multiple sclerosis can, naturally, have an enormous impact on your life. You may need to make some lifestyle changes and try a few treatments to help manage the various symptoms, ...