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.
Verywell Health on MSN
What is clonus?
Medically reviewed by Brigid Dwyer, MD Key Takeaways Clonus causes involuntary, rhythmic muscle contractions when a muscle is stretched.It is often observed in conditions like multiple sclerosis, ...
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