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Abstract #5139

Rectus capitis posterior minorĀ and nuchal ligament work as a mydural bridge complex-from 3D MR Imaging in vivo

Mei-yu Sun1, Ai-lian Liu1, Qing-wei Song1, Li-Zhi Xie2, Sheng-bo Yu3, and Hong-jin Sui3

1radiology department, The first affiliated Hospital of Dalian Medical University, Dalian, China, 2GE Healthcare, MR Research China, Beijing, China, 3Department of Anatomy, Dalian Medical University, Dalian, China

Myodural bridges (MDB) are soft tissue connections crossing the cervical epidural space to link suboccipital muscles, ligament and cervical dura. It may transmit tensile force from its connection components to dura mater which correlates with spinal cord circulation and chronic headache. The MDB was first described as a dense connective tissue bridge located between the rectus capitis posterior minor (RCPmi) muscle and the spinal dura. RCPmi mass has been suggested as a biomechanical contributor to injury severity in mild traumatic injury and cervicogenic headache. The fibers from nuchal ligament (NL) have also been demonstrated to attach to the cervical dura mater and may affect the RCPmi muscle mass. However, the correlation between RCPmi and NL remains unclear and is investigated in this work.

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