L2 is a large lumbar vertebra with a prominent body and strong transverse processes providing attachment for the psoas major and quadratus lumborum muscles. The L2 nerve root contributes to hip flexion and anterior thigh sensation.
| Articulations |
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|---|---|
| Landmarks |
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| Ossification | As per lumbar vertebra pattern. |
L2 vertebra marks the end of the conus medullaris in some individuals and the beginning of the cauda equina. L1-L2 disc herniation compresses the L2 nerve root, producing anterolateral thigh pain and numbness with hip flexion weakness. The lumbar plexus is formed by the anterior rami of L1 through L4 within the psoas muscle adjacent to the lumbar vertebral bodies.
Axial loading fractures the L2 body with possible retropulsion of fragments into the canal and compression of the cauda equina.
Anterior wedge fracture of the L2 body occurs after falls or in osteoporotic bone and usually heals with bracing and analgesia.
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