pathological laughter


Also found in: Dictionary, Thesaurus, Encyclopedia.
An uncommon symptom usually caused by bilateral, diffuse cerebral lesions but which may rarely also be associated with isolated cerebral lesions and may herald midbrain infarction

pathological laughter

Uncontrolled laughter (occasionally accompanied by, or alternating with, uncontrolled crying), caused by pseudobulbar lesions of the brain. These lesions may result from lacunar strokes, multiple sclerosis, anoxic brain injury, and other forms of brain injury.
See also: laughter
Mentioned in ?