Primary lateral sclerosis (PLS) is a motor neuron disease that occurs when the nerve cells in muscles slowly deteriorate.

Primary lateral sclerosis (PLS) is a progressive degenerative motor neuron disease. PLS affects the nerve cells in the body ...

Motor neuron disease usually refers to amyotrophic lateral sclerosis, but it can also refer to other kind of neurodegenerative disease that affect the motor neurons, such as progressive primary ...