Myodural bridge

Myodural Bridge

The myodural bridge (MDB) is a fibrous connective tissue that connects the rectus capitis posterior minor (RCPmi) and obliquus capitis inferior (OCI) muscles to the dura mater, the outermost layer of the meninges that surround the brain and spinal cord. This anatomical structure was first discovered in the late 1990s and has since been the subject of numerous studies due to its potential implications in headaches and cervical spine disorders.

Anatomy

The myodural bridge is located in the posterior atlanto-occipital interspace, a region at the base of the skull. It is composed of dense, fibrous connective tissue that extends from the RCPmi and OCI muscles to the posterior atlanto-occipital membrane and the posterior atlanto-axial membrane, which are continuous with the dura mater.

File:Myodural bridge.jpg

Illustration of the myodural bridge connecting the rectus capitis posterior minor and obliquus capitis inferior muscles to the dura mater.

Function

The exact function of the myodural bridge is not fully understood. However, it is believed to play a role in the movement of the dura mater during neck movements, which could potentially influence cerebrospinal fluid dynamics and intracranial pressure. Some researchers also suggest that the MDB could provide proprioceptive feedback to the central nervous system, contributing to postural control and stability.

Clinical significance

The myodural bridge has been implicated in a variety of clinical conditions, including cervicogenic headaches, whiplash injuries, and cervical spine disorders. It is hypothesized that tension or damage to the MDB could lead to dural irritation or inflammation, resulting in pain and other symptoms. However, more research is needed to fully understand the clinical implications of the MDB.

See also

• Rectus capitis posterior minor
• Obliquus capitis inferior
• Dura mater
• Meninges
• Cervicogenic headache
• Whiplash

External links

• Wikimedia Commons has media related to Myodural bridge.