Primary lateral sclerosis (PLS) is a motor neuron disease variation of ALS (amyotrophic lateral sclerosis) but far more rare. PLS refers to patients who seem to have disruptions with only upper motor ...
Primary lateral sclerosis (PLS) and amyotrophic lateral sclerosis (ALS) are neurodegenerative diseases. PLS typically develops slowly, while ALS rapidly affects mobility and can become fatal.