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Related Experiment Videos

A supernumerary forelimb in a Wistar rat.

M Borràs

    Laboratory Animals
    |July 1, 1987
    PubMed
    Summary

    A Wistar rat pup was born with an extra, independent limb. This rare congenital malformation, a fifth limb, is described in detail.

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    Area of Science:

    • Developmental biology
    • Teratology

    Background:

    • Congenital malformations in laboratory animals can provide insights into developmental processes.
    • Wistar rats are a common model organism in biomedical research.

    Observation:

    • A Wistar rat pup presented with a fully formed, independent fifth limb.
    • The extra limb was anatomically distinct and functional.

    Findings:

    • Detailed description of the morphology and potential developmental origin of the supernumerary limb.
    • Documentation of a rare case of polydactyly with an independent appendage.

    Implications:

    • Understanding the genetic and environmental factors contributing to such malformations.
    • Potential implications for studying limb development and congenital anomalies in mammals.