Lumbar plexus

Last revised by Craig Hacking on 18 Apr 2023

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:

See: mnemonics for branches of the lumbar plexus and mnemonics for the roots.

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

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