ArticleAnatomical science international2022
Relationship between the lumbosacral plexus deviation and 12th rib length in Japanese macaques (Macaca fuscata).
Article in Anatomical science international, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 4 citations in OpenAlex.
- 12th rib length and L4 branch morphology predict cranio-caudal symptom discrepancies in lumbar disorders: clinical and cadaveric study.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026Article
- Distinctive Innervation Patterns of Thigh Extensor Muscles in Anura: A Morphogenetic Hypothesis of Nerve Re-Routing Within the Hindlimb Plexus in the Tetrapod Evolutionary Process.Anatomia, histologia, embryologia · 2026Article
- Anatomic variations in origin and coursing of the transverse cervical artery: morphogenesis and relation to the high arch-shaped subclavian artery.Anatomical science international · 2025Article
- Prominent caudal shift of the lumbar plexus roots in spines with 18 thoracolumbar vertebrae.Surgical and radiologic anatomy : SRA · 2023Article
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6 authors at 3 institutions in 1 country.
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Abstract
The relationship between the lumbosacral plexus (LSP) origin and the 12th rib length was recently determined in humans; cranial and caudal deviations of the plexus origin are related to shortening and elongation of the 12th rib, respectively. However, it remains unclear whether such anatomical correlations are also observed in non-human mammals. To address this issue, in the present study, we evaluated the LSP origin and the 12th rib length in Japanese macaques (Macaca fuscata). In typical cases, the femoral and obturator nerves were derived from both the 4th and 5th lumbar nerves, and the lumbosacral trunk was from the 5th to 7th lumbar nerves. Some of the LSPs exhibited a caudal deviation of their origins; the femoral and obturator nerves were also derived from the 6th lumbar nerve, in addition to the 4th and 5th lumbar nerves; the lumbosacral trunk lost the 5th lumbar nerve origin and arose from the 6th and 7th lumbar nerves. Individuals with the caudal deviation of LSP origin exhibited significant elongation of the 12th ribs, in comparison with individuals with the typical plexus. The present findings indicate that the caudal deviation of LSP origin was correlated to the 12th rib elongation in Japanese macaques, similar to humans. As a future studies, we need to clarify which mammalian groups exhibit such correlation between the deviation of the LSP origin and the lowest rib length, and further to provide evolutionary implications of this correlation.
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