Lumbar Spine, X-ray
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Lumbar Spine, X-ray
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Lumbar spine. Coloured X-ray of four lumbar vertebrae of the human spine, seen in antero- posterior view. Five lumbar bones are found in the lower back, with those here being L1 (at top) to L4 (at bottom). Part of L5 which articulates with the sacrum of the pelvis is seen below L4. The lumbar vertebrae are the largest of the un- fused vertebrae in the backbone. Each vertebra comprises a wide disc-like body, with transverse bony processes projecting out sideways. These bony processes are muscle attachment points. Between each vertebra is a cartilaginous disc. A canal inside each vertebra accommodates the spinal cord. The spine is made up of 33 vertebrae.
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May 2nd, 2013
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