Directional and fluctuating asymmetry in finger and a-b ridge counts in psychosis: A case-control study

Saha, Sukanta, Loesch, Danuta, Chant, David, Welham, Joy, El-Saadi, Ossama, Fañanás, Lourdes, Mowry, Bryan and McGrath, John (2003) Directional and fluctuating asymmetry in finger and a-b ridge counts in psychosis: A case-control study. BMC Psychiatry, 3 Article 3: . doi:10.1186/1471-244X-3-3


Author Saha, Sukanta
Loesch, Danuta
Chant, David
Welham, Joy
El-Saadi, Ossama
Fañanás, Lourdes
Mowry, Bryan
McGrath, John
Title Directional and fluctuating asymmetry in finger and a-b ridge counts in psychosis: A case-control study
Formatted title
Directional and fluctuating asymmetry in finger and a-b ridge counts in psychosis: a case-control study
Journal name BMC Psychiatry   Check publisher's open access policy
ISSN 1471-244X
Publication date 2003-03-23
Sub-type Article (original research)
DOI 10.1186/1471-244X-3-3
Open Access Status DOI
Volume 3
Issue Article 3
Total pages 9
Editor Fiona Godlee
Place of publication London, England
Publisher BioMed Central Ltd
Language eng
Subject C1
321021 Psychiatry
110319 Psychiatry (incl. Psychotherapy)
111714 Mental Health
Formatted abstract
Background: Several studies have reported alterations in finger and  a-b ridge counts, and their derived measures of asymmetry, in schizophrenia compared to controls. Because ridges are fully formed by the end of the second trimester, they may provide clues to disturbed early development. The aim of this study was to assess these measures in a sample of patients with psychosis and normal controls.

Methods: Individuals with psychosis (n = 240), and normal controls (n = 228) were drawn from a catchment-area case-control study. Differences in finger and a-b ridge count and Fluctuating Asymmetry were assessed in three group comparisons (non-affective psychosis versus controls; affective psychosis versus controls; non-affective psychosis versus affective psychosis). The analyses were performed separately for males and females.

Results: There were no significant group differences for finger nor a-b ridge counts. While there were no group difference for Directional Asymmetry, for Fluctuating Asymmetry measures men with non-affective psychosis had significantly higher fluctuating asymmetry of the index finger ridge count (a) when compared to controls (FA-correlation score, p = 0.02), and (b) when compared to affective psychosis (adjusted FA-difference score, p = 0.04).

Conclusion: Overall, measures of finger and a-b ridge counts, and their derived measures of directional and fluctuating asymmetry were not prominent features of psychosis in this sample. While directional asymmetry in cerebral morphology is reduced in schizophrenia, this is not reflected in dermatoglyphic variables.
Keyword finger
a-b ridge counts
asymmetry
schizophrenia
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
2004 Higher Education Research Data Collection
School of Medicine Publications
 
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Created: Wed, 15 Aug 2007, 12:18:28 EST