凝视引发的笑声。

J Neurol Neurosurg Psychiatry. 1977 Aug;40(8):815-7. doi: 10.1136/jnnp.40.8.815.

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.

一名患有巨大髓外脑干肿瘤的患者，其病理性笑是由追踪眼球运动诱发的。强光照射也会引发笑声。本文讨论了视觉刺激诱发病理性笑的机制。