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Upper limb injuries and handedness plasticity

G Dellatolas1, T Moreau, P Jallon

  • 1Institut National de la Santé et de la Recherche Médicale, U169: Recherches en Epidémiologie, Villejuif, France.

British Journal of Psychology (London, England : 1953)
|May 1, 1993
PubMed
Summary

Hand injuries in young men can temporarily shift hand use, increasing weak right-handedness. Early childhood injuries may also influence left-handedness, highlighting handedness plasticity.

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Area of Science:

  • Neuroscience
  • Human Biology
  • Developmental Psychology

Background:

  • Handedness, the preference for using one hand over the other, is a complex trait.
  • Previous research has explored potential links between handedness and various factors, including injury history.
  • Understanding factors influencing handedness development is crucial for developmental and neurological studies.

Purpose of the Study:

  • To investigate the association between handedness and reported injuries in a large cohort of young men.
  • To explore if injury history, particularly early-life injuries, influences the prevalence of left-handedness or mixed-handedness.

Main Methods:

  • A questionnaire survey was administered to 9591 men aged 17–27.
  • Participants reported their current handedness and any history of injuries that caused a temporary shift in hand use.

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  • Statistical analysis was performed to assess associations between injury reports and handedness scores.

    • Main Results:

    • A significant association was found between current handedness score and reported injuries leading to temporary hand-use shifts.
    • Weak right-handers were more prevalent among individuals reporting such injuries.
    • No overall association between left-handedness and injuries was observed, but early childhood injuries (< school age) were linked to increased left-handedness.

    Conclusions:

    • Human handedness exhibits significant plasticity, adapting in response to environmental factors like injury.
    • Innate left- or non-right-handedness does not appear to be a predisposing risk factor for accident occurrence.
    • Injury history, especially in early development, can influence the expression of handedness later in life.