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The lateral cutaneous branches of the dorsal rami of the thoraco-lumbar junction

Les branches cutanées latérales des n. rachidiens de la charnière thoraco-lombaire. Une étude anatomique sur 37 coupes

An anatomical study on 37 dissections

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Summary

Thirty-seven dissections have shown that the skin of the low back is innervated by the lateral branches of the dorsal rami of T12 and L1 in 22 cases (60%) or T12 L1 and L2, in 10 cases (27%) or T12 L1 and L2 receiving an anastomosis from L3 in 5 cases (13%). The most medial nerve crossed the iliac crest through a rigid osseo-aponeurotic orifice located 7–8 cm from the midline which was seen compressing the nerve in 2 instances. This pattern of distribution may sometimes explain unilateral low back pain.

Résumé

Trente-sept dissections ont montré que les téguments lombaires bas sont innervés par les branches latérales des rameaux dorsaux de T12 et L1 dans 22 cas (60 %) ou T12, L1 et L2 dans 10 cas (27 %) ou T12, L1 et L2 recevant une anastomose de L3 dans 5 cas (13 %). Le nerf le plus médial croise la crête iliaque en passant à travers un orifice ostéoaponévrotique inextensible, situé à 7, 8 cm de la ligne des épineuses. Cet orifice comprimait nettement le nerf dans 2 cas. Ce mode de distribution pourrait expliquer certaines douleurs lombaires unilatérales.

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Maigne, J.Y., Lazareth, J.P., Surville, H.G. et al. The lateral cutaneous branches of the dorsal rami of the thoraco-lumbar junction. Surg Radiol Anat 11, 289–293 (1989). https://doi.org/10.1007/BF02098698

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  • DOI: https://doi.org/10.1007/BF02098698

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