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Related Experiment Videos

Handedness and esotropia.

S Lessell

    Archives of Ophthalmology (Chicago, Ill. : 1960)
    |October 1, 1986
    PubMed
    Summary

    Patients with esotropia show significantly different handedness compared to controls, with more non-right-handers. This suggests a link between anomalous cerebral dominance, brain architecture, and esotropia development.

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    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Genetics

    Background:

    • Esotropia is a common form of strabismus.
    • Handedness is typically right-dominant in most populations.
    • Anomalous cerebral dominance has been investigated in various neurological conditions.

    Purpose of the Study:

    • To investigate the relationship between handedness and esotropia.
    • To explore if non-right-handedness is more prevalent in individuals with esotropia.
    • To examine potential links between handedness, cerebral dominance, and brain architecture in esotropia.

    Main Methods:

    • A questionnaire-based study was conducted.
    • 1083 non-esotropic control subjects and 170 patients with nonparalytic esotropia participated.
    • Handedness was assessed using five questions on hand preference, classifying subjects as right-handed, left-handed, or ambidextrous.

    Main Results:

    • A significant difference in handedness was observed between esotropic patients and non-esotropic controls.
    • The primary difference was an excess of non-right-handers (left-handed and ambidextrous) among patients with esotropia.
    • Non-right-handedness may serve as a marker for anomalous cerebral dominance.

    Conclusions:

    • The findings suggest a potential association between non-right-handedness and esotropia.
    • A higher prevalence of non-right-handers in esotropia may indicate anomalous brain architecture.
    • Structural brain anomalies could be a contributing factor to the development of esotropia.

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