Text: Most common causes of lower motor neuron injuries are trauma to peripheral nerves that serve the axons -- a virus that selectively attacks ventral horn cells. Disuse atrophy of the muscle occurs i.e., shrinkage of muscle fibre finally replaced by fibrous tissue (fibrous muscle) Other causes include Guillain--Barre syndrome, C. botulism, polio, and cauda equina syndrome; another common cause of lower motor neuron degeneration is amyotrophic lateral sclerosis.

Question: is guillain barre syndrome a lower motor neuron disease?
yes