The lateral cutaneous branches of the dorsal rami of the thoraco-lumbar junction. An anatomical study on 37 dissections.
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 LI 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.
Maigne
J Y
JY
Laboratoire d'Anatomie, UER Pitié-Salpétriène, Paris, France.
Lazareth
J P
JP
Guérin Surville
H
H
Maigne
R
R
D000328:Adult; D001416:Back Pain / Q000209:etiology; D002081:Buttocks / Q000294:innervation*; D005260:Female; D006801:Humans; D007085:Ilium / Q000033:anatomy & histology; D008159:Lumbar Vertebrae / Q000294:innervation; D008297:Male; D012867:Skin / Q000294:innervation*; D013904:Thoracic Vertebrae / Q000294:innervation