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Related Experiment Videos

Behavioral effects of spinal cord transection in the developing rat

E D Weber, D J Stelzner

    Brain Research
    |April 15, 1977
    PubMed
    Summary

    Spinal cord injury in young rats reveals a critical developmental period for recovery. Rats injured before 15 days old show better hindlimb function recovery than older rats, indicating age-dependent neural plasticity.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Regenerative Medicine

    Background:

    • Spinal cord injury (SCI) impacts motor function.
    • Age influences recovery outcomes after SCI.
    • Understanding developmental plasticity is crucial for therapeutic strategies.

    Purpose of the Study:

    • To investigate the impact of age at the time of spinal cord transection on hindlimb motor recovery in albino rats.
    • To identify a critical developmental period influencing functional recovery post-SCI.

    Main Methods:

    • Mid-thoracic spinal cord transection in rats aged 0 to over 90 days.
    • Behavioral assessment of hindlimb responses across various tasks.
    • Independent, blinded evaluation of motor recovery data.
    • Histological confirmation of complete transections.

    Main Results:

    • Rats lesioned before 15 days of age exhibited significant hindlimb response development and recovery, similar to neonatally lesioned animals.
    • Rats lesioned at 18 days or older showed limited recovery, resembling weanling transected animals.
    • Postural responses recovered rapidly in pre-15-day-old lesioned rats, but were prolonged and less complete in older groups.
    • Responses mature at the time of lesioning in younger rats were permanently depressed if supraspinal control was present.

    Conclusions:

    • A critical developmental window around 15 postnatal days exists for functional recovery after spinal cord injury in rats.
    • Early-life SCI allows for greater neural plasticity and functional recovery compared to later-life SCI.
    • Age-dependent recovery highlights potential therapeutic targets for enhancing neuroplasticity post-SCI.

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