Spinal Anatomy Exam III Practice

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The base of the sacrum articulates with which vertebra?

L5

The top part of the sacrum, called its base, forms the lumbosacral joint with the vertebra directly above it—the last lumbar vertebra. The base is the superior surface that faces upward and meets the inferior endplate and facets of L5. The pelvis connects to the sacrum laterally at the sacroiliac joints, not along the base. So the vertebra that articulates with the base of the sacrum is L5.

L4

S1

Pelvis

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