Mondo Description Progressive bulbar palsy involves the brain stem. The brain stem is the part of the brain needed for swallowing, speaking, chewing, and other functions. Signs and symptoms of progressive bulbar palsy include difficulty swallowing, weak jaw and facial muscles, progressive loss of speech, and weakening of the tongue. Additional symptoms include less prominent weakness in the arms and legs, and outbursts of laughing or crying (called emotional lability). Progressive bulbar palsy is considered a variant form of amyotrophic lateral sclerosis (ALS). Many people with progressive bulbar palsy later develop ALS. While there is no cure for progressive bulbar palsy or for ALS, doctors can treat symptoms.

Uniprot Description A rare neurological disease characterized by progressive weakness of the muscles innervated by cranial nerves of the lower brain stem. It may present in childhood with severe neurological deterioration with hypotonia, respiratory insufficiency leading to premature death, or later in life with bulbar weakness which progresses to involve motor neurons throughout the neuroaxis. Clinical manifestations include dysarthria, dysphagia, facial weakness, tongue weakness, and fasciculations of the tongue and facial muscles.