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Manual persistence in infancy

E Strauss

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |July 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Infants do not show hand preference at birth, but right-hand control develops significantly within the first few months. Early manual asymmetry is not evident in neonates or young infants.

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    Area of Science:

    • Developmental psychology
    • Neuroscience
    • Human infant behavior

    Background:

    • Previous research suggested early hand preference in infants.
    • Manual asymmetry, the preferential use of one hand over the other, is a hallmark of human motor development.

    Purpose of the Study:

    • To investigate the emergence of manual asymmetry in early infancy.
    • To determine if neonates exhibit hand preference for grasping objects.

    Main Methods:

    • Observational studies on neonates and young infants.
    • Assessment of object grasping (rattle) in each hand.

    Main Results:

    • No significant manual asymmetry was observed in neonates (mean age 3.3 days).
    • No significant manual asymmetry was found in infants (mean age 2.4 months).

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  • Significant development in right-hand control was observed between neonates and 2.4-month-old infants.

    • Conclusions:

    • Manual asymmetry is not present at birth.
    • Right-hand preference emerges later in infancy, not evident in the first few months.
    • Motor control development, specifically for the right hand, progresses significantly in early infancy.