Pathologic laughter and crying in ALS: a search for their origin

  title={Pathologic laughter and crying in ALS: a search for their origin},
  author={John P. Gallagher},
  journal={Acta Neurologica Scandinavica},
  • J. P. Gallagher
  • Published 1 August 1989
  • Psychology
  • Acta Neurologica Scandinavica
ABSTRACT Spells of laughter and crying are well known in patients with amyotrophic lateral sclerosis (ALS). Since ALS occurs mostly in older age groups, this brings up the possibility that aging changes in the brain could play a causative role in the origin of such spells. To rule out or at least reduce the complicating factor of aging, a study was made of the incidence of pathologic laughter and crying in patients whose motor neuron disease had started before the age of 45 years. The data were… 

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