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 ...

Spinal bulbar muscular atrophy (SBMA) causes a loss of motor neurons in the spinal cord and brainstem. It mainly affects facial and swallowing muscles and the muscles in the arms and legs. Previously, ...

Loss of muscle mass (muscle atrophy) can be a result of aging or lifestyle habits, like being inactive or eating a poor diet. Muscle loss can also point to hormone abnormalities or underlying health ...