The lumbar spinal nerve 1 (L1) is a spinal nerve of the lumbar segment.^[1].

It originates from the spinal column from below the lumbar vertebra 1 (L1).

[edit] Muscles

L1 supplies many muscles, either directly or through nerves originating from L1. They may be innervated with L1 as single origin, or be innervated partly by L1 and partly by other spinal nerves. The muscles are:

• quadratus lumborum (partly)
• iliopsoas muscle (partly)

[edit] References

v • d • e Nerves: spinal nerves (TA A14.2, GA 9.916) Cervical (8) C1, C2, C3, C4, C5, C6, C7, C8 anterior (Cervical plexus, Brachial plexus) - posterior (Posterior branches of cervical nerves, Suboccipital - C1, Greater occipital - C2, Third occipital - C3) Thoracic (12) T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 anterior (Intercostal, Intercostobrachial - T2, Thoraco-abdominal nerves - T7-T11, Subcostal - T12) - posterior (Posterior branches of thoracic nerves) Lumbar (5) L1, L2, L3, L4, L5 anterior (Lumbar plexus, Lumbosacral trunk) · posterior (Posterior branches of the lumbar nerves, Superior cluneal L1-L3) Sacral (5) S1, S2, S3, S4, S5 anterior (Sacral plexus) · posterior (Posterior branches of sacral nerves, Medial cluneal nerves) Coccygeal (1) anterior (Coccygeal plexus) · posterior (Posterior branch of coccygeal nerve)

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