TY - JOUR
T1 - Developmental instability and schizotypy
AU - Rosa, Araceli
AU - Van Os, Jim
AU - Fañanás, Lourdes
AU - Barrantes-Vidal, Neus
AU - Caparrós, Beatriz
AU - Gutiérrez, Blanca
AU - Obiols, Jordi
PY - 2000/6/16
Y1 - 2000/6/16
N2 - Introduction. It has been suggested that evidence of developmental disturbance of cognition and lateralisation in schizophrenia can be best understood from the perspective of developmental stability (DS), an indicator of the extent to which an individual develops according to a specified ontogenic programme in the presence of environmental noise. Higher levels of fluctuating asymmetry (FA; the difference between right and left side of a quantitative morphological trait such as dermatoglyphics) are thought to reflect less DS. We examined this issue for dimensions of schizotypy. Methods. Associations between FA, measures of laterality and cognitive function on the one hand, and negative and positive dimensions of schizotypy on the other, were examined in a sample of 260 healthy adolescents aged 11.9-15.6 years. FA was measured as a-b ridge count right-left differences. Neuropsychological measures yielded a general cognitive ability score and a frontal function score. Laterality was assessed with the Annett scale. Results. Measures of psychosis proneness were normally distributed. Negative schizotypy was associated with more FA and lower general cognitive ability in a dose-response fashion. The association with FA was more apparent in boys. No associations existed with laterality or frontal function. Conclusion. The negative dimension of schizotypy may be associated with early developmental instability, resembling the pattern seen in the negative symptom dimension of schizophrenia. Measures of fluctuating asymmetry may be more sensitive with regard to the schizotypy phenotype than measures of laterality. (C) 2000 Elsevier Science B.V. All rights reserved.
AB - Introduction. It has been suggested that evidence of developmental disturbance of cognition and lateralisation in schizophrenia can be best understood from the perspective of developmental stability (DS), an indicator of the extent to which an individual develops according to a specified ontogenic programme in the presence of environmental noise. Higher levels of fluctuating asymmetry (FA; the difference between right and left side of a quantitative morphological trait such as dermatoglyphics) are thought to reflect less DS. We examined this issue for dimensions of schizotypy. Methods. Associations between FA, measures of laterality and cognitive function on the one hand, and negative and positive dimensions of schizotypy on the other, were examined in a sample of 260 healthy adolescents aged 11.9-15.6 years. FA was measured as a-b ridge count right-left differences. Neuropsychological measures yielded a general cognitive ability score and a frontal function score. Laterality was assessed with the Annett scale. Results. Measures of psychosis proneness were normally distributed. Negative schizotypy was associated with more FA and lower general cognitive ability in a dose-response fashion. The association with FA was more apparent in boys. No associations existed with laterality or frontal function. Conclusion. The negative dimension of schizotypy may be associated with early developmental instability, resembling the pattern seen in the negative symptom dimension of schizophrenia. Measures of fluctuating asymmetry may be more sensitive with regard to the schizotypy phenotype than measures of laterality. (C) 2000 Elsevier Science B.V. All rights reserved.
KW - Dermatoglyphics
KW - Developmental stability
KW - Fluctuating asymmetry
KW - Neurodevelopment
KW - Normal adolescents
KW - Schizophrenia
KW - Schizotypy proneness
U2 - https://doi.org/10.1016/S0920-9964(99)00149-8
DO - https://doi.org/10.1016/S0920-9964(99)00149-8
M3 - Article
VL - 43
SP - 125
EP - 134
JO - Schizophrenia Research
JF - Schizophrenia Research
SN - 0920-9964
ER -