Corpus: Lumbar nerve
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Synonym: lumbar nerve, lumbar nerve
English:
Definition[Bearbeiten]
The term lumbar nerves refers to the 5 paired spinal nerves that emerge from the lumbar spine. The associated spinal cord segments are numbered L1 to L5.
Anatomy[Bearbeiten]
The lumbar nerves branch - immediately after they leave the intervertebral foramen - into anterior and posterior branches.
The anterior or ventral branches of segments L1 to L3 together form the lumbar plexus. It contains further fibres from the neighbouring segments Th12 and L4. The anterior branches of segments L4 and L5 form the lumbosacral trunk.
The posterior branches of the lumbar nerves supply the autochthonous back muscles (e.g. erector spinae muscle) and the skin of the upper and middle gluteal region.