Medically reviewed by Jennifer Steinhoff, MD Key Takeaways Muscle rigidity can happen when muscles are overused or not ...

Q: What is stiff person syndrome with which Celine Dion was diagnosed? A: Stiff-person syndrome (SPS) is a rare neurological disease affecting about 1or 2 out of a million people that may cause the ...

Researchers from Mass General Brigham identified therapeutic targets that may optimize symptom-specific treatment for Parkinson’s disease. Brain circuits associated with symptom improvements of tremor ...

Autism spectrum disorder (ASD) is a complex neurodevelopmental condition affecting 1 in 36 children, with boys being diagnosed five times more often than girls. As with attention deficit/hyperactivity ...