- May 2, 2026The sacral canal is the continuation of the spinal canal through the sacrum, containing the sacral and coccygeal nerve roots…
- May 2, 2026The caudal epidural space is the inferior extent of the epidural space accessed via the sacral hiatus, containing epidural fat,…
- May 2, 2026The epidural space (extradural space) is the potential space between the dura mater of the spinal cord and the periosteum…
- May 2, 2026The subarachnoid space is the cerebrospinal fluid-filled space between the arachnoid mater and the pia mater, continuous from the brain…
- May 2, 2026The intervertebral disc functions as an amphiarthrosis (slightly moveable joint) between adjacent vertebral bodies. The disc consists of the central…
- May 2, 2026Each rib articulates with the thoracic spine through two distinct synovial joints: the costovertebral joint proper (between the rib head…
- May 2, 2026The twelve thoracic intervertebral discs connect adjacent vertebral bodies from T1-T2 to T12-L1, each consisting of a central nucleus pulposus…
- May 2, 2026The lumbar zygapophyseal joints have a sagittal orientation (superior-inferior) that allows flexion-extension while severely limiting rotation — explaining why lumbar…
- May 2, 2026The L4-L5 intervertebral disc is the most commonly herniated disc in the lumbar spine, with the L5 nerve root most…
- May 2, 2026The L5-S1 disc is the most highly loaded lumbar disc, accepting the greatest mechanical stress from the combination of lumbar…