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Related Experiment Videos

Lumbar spondylectomy in the subhuman primate.

P Litwak, W V Lumb, A W Nelson

    American Journal of Veterinary Research
    |September 1, 1978
    PubMed
    Summary

    Surgical removal of lumbar vertebrae in macaques showed promising results, with animals regaining normal hind leg function quickly. Stabilization techniques were effective for single vertebra removal, though less so for double removals, yet function remained unimpaired.

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    Area of Science:

    • Veterinary Surgery
    • Primate Research
    • Spinal Anatomy

    Background:

    • Spinal surgery in non-human primates is crucial for understanding human spinal conditions.
    • Previous studies on dogs showed varied outcomes in vertebral column surgery.
    • Macaca mulatta (rhesus macaques) serve as a relevant model for spinal research due to anatomical similarities.

    Purpose of the Study:

    • To evaluate the feasibility and outcomes of lumbar vertebrae removal in Macaca mulatta.
    • To assess the efficacy of specific stabilization techniques following vertebral resection.
    • To compare surgical outcomes in primates with previous canine studies.

    Main Methods:

    • Surgical removal of the 2nd or 3rd lumbar vertebrae (or both) in Macaca mulatta.
    • Application of spinous process and vertebral body plates for stabilization.

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  • Post-operative assessment of hind limb function, gait, and spinal alignment.
  • Histological examination of healed vertebral columns.

    • Main Results:

    • All macaques regained normal hind limb function within 3 days post-surgery.
    • Single vertebra removal with stabilization resulted in near-normal spinal alignment.
    • Removal of two lumbar vertebrae without modification of stabilization led to kyphotic deformity.
    • Despite deformities, all macaques maintained full ambulatory function.

    Conclusions:

    • Lumbar spondylectomy is a viable procedure in Macaca mulatta with rapid functional recovery.
    • Current stabilization methods are effective for single vertebra removal but require refinement for multiple removals.
    • Functional recovery in macaques after lumbar vertebrae removal is robust, irrespective of minor spinal deformities.