Gaze-induced laughter.
Pathological laughter was stimulated by pursuit eye movements with a large extramedullary brainstem tumour. Laughter was also evoked by intense direct light. The mechanism by which visual stimuli could induce pathological laughter is discussed.
D000328:Adult; D001932:Brain Neoplasms / Q000473:pathology / Q000503:physiopathology*; D001933:Brain Stem / Q000473:pathology; D002812:Chondroma / Q000473:pathology / Q000503:physiopathology*; D005133:Eye Movements; D006801:Humans; D007845:Laughter; D008297:Male; D010775:Photic Stimulation