A multiply split femoral nerve and psoas quartus muscle

The femoral nerve is the largest branch of the lumbar plexus. It is normally composed of the ventral rami of spinal nerves L2 to L4. The psoas major has proximal attachments onto the T12 to L5 vertebrae and related intervertebral discs, fuses with the iliacus deep to the inguinal ligament and then a...

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Bibliographic Details
Published in:Anatomy & cell biology 2019, 52(2), , pp.208-210
Main Authors: Wong, T L, Kikuta, Shogo, Iwanaga, Joe, Tubbs, R Shane
Format: Article
Language:English
Subjects:
Case Report
해부학
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Summary:The femoral nerve is the largest branch of the lumbar plexus. It is normally composed of the ventral rami of spinal nerves L2 to L4. The psoas major has proximal attachments onto the T12 to L5 vertebrae and related intervertebral discs, fuses with the iliacus deep to the inguinal ligament and then attaches onto the lesser trochanter of the femur. Normally, the anatomical relationship is that the femoral nerve is located between the iliacus and psoas major. Herein, we report a case of the psoas quartus muscle related to several splits of the femoral nerve within the pelvis. Although the embryology for this is unclear, surgeons and physicians should be aware of such anatomical variants in order to better understand pain and entrapment syndromes and during surgical maneuvers in this region such as lateral transpsoas approaches to the lumbar spine.
ISSN:2093-3665
2093-3673
DOI:10.5115/acb.2019.52.2.208