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Subjects/Anesthesia/Epidural Anesthesia
Epidural Anesthesia
medium
syringe Anesthesia

Which of the following structures forms the posterior boundary of the epidural space in the lumbar region?

A. A. Ligamentum flavum
B. B. Dura mater
C. C. Arachnoid mater
D. D. Posterior longitudinal ligament

Explanation

The epidural space is bounded anteriorly by the posterior longitudinal ligament and vertebral bodies, laterally by the pedicles and intervertebral foramina, and posteriorly by the ligamentum flavum and vertebral laminae. The dura mater forms the inner boundary of the epidural space, separating the epidural space from the subarachnoid space.

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