Primary Lateral Sclerosis (PLS): Symptoms, Diagnosis, and Management Primary Lateral Sclerosis (PLS) is a rare and progressive neurological disorder that affects the nerve cells in the brain and spinal cord responsible for controlling voluntary muscle movement. This condition is characterized by a gradual but relentless deterioration of motor function, leading to increasing weakness, stiffness, and … Continue reading Primary Lateral Sclerosis (PLS): Symptoms, Diagnosis, and Management More