Smooth-pursuit eye movement dysfunction and liability for schizophrenia: implications for genetic modeling

J Abnorm Psychol. 1992 Feb;101(1):117-29. doi: 10.1037//0021-843x.101.1.117.


Forty-one nonpsychiatric subjects, 38 probands with schizophrenia, and 99 of their relatives were studied. Oculomotor functioning was bimodally distributed for probands and relatives. Oculomotor dysfunction was not present in all families with a schizophrenic proband. In those families in which it was present, there were significant phenotypic correlations between oculomotor functioning and schizophrenia-related characteristics. The patterns of familial resemblance in the families in whom oculomotor dysfunction was present were consistent with nonadditive genetic variance contributing both to oculomotor dysfunction and to the relationship between oculomotor dysfunction and clinical symptoms. These results suggest that schizophrenia may be etiologically heterogeneous and that oculomotor dysfunction may help to identify nonadditive genetic variance for this disorder.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adult
  • Arousal / genetics
  • Female
  • Humans
  • Male
  • Middle Aged
  • Models, Genetic
  • Ocular Motility Disorders / diagnosis
  • Ocular Motility Disorders / genetics
  • Ocular Motility Disorders / psychology
  • Phenotype
  • Pursuit, Smooth / genetics*
  • Risk Factors
  • Schizophrenia / diagnosis
  • Schizophrenia / genetics*
  • Schizophrenic Psychology*