Plexus lumbosacralis

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.

Summary

Gross anatomy

The branches that arise from the lumbar plexus are:

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

Variant anatomy

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

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