Lumbar plexus

Last revised by Dr Sarah Robertson on 20 Dec 2017

The lumbar plexus is a complex neural network formed by the lower thoracic and lumbar ventral nerve roots (T12 to L5) which supplies motor and sensory innervation to the lower limb and pelvic girdle.

The branches that arise from the lumbar plexus are:

The branches of the lumber plexus are covered in this mnemonic.

Variation in the lumbar plexus appears to be common (~90% in one study) 1:

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Cases and figures

  • Figure 1: lumbar plexus labeled
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