Adult-onset spinal muscular atrophy (SMA) is a rare neuromuscular disorder that primarily affects the motor neurons in the spinal cord, leading to muscle weakness and atrophy. SMA is part of a group ...

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. An unusual surge of new-onset tics in patients with no prior history of these disorders, has been ...

Tics take the form of abnormal, repetitive, and unintentional movements or vocalizations that do not follow any rhythm or pattern. Provisional tic disorder, previously known as transient tic disorder, ...