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The myodural bridge complex defined as a new functional structure.

Nan Zheng1, Beom Sun Chung2, Yi-Lin Li1

  • 1Department of Anatomy, College of Basic Medicine, Dalian Medical University, 9 West Section, Lushun South Road, Dalian, People's Republic of China.

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|September 30, 2019
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Summary
This summary is machine-generated.

The myodural bridge complex (MDBC) connects suboccipital muscles to the cervical spinal dura mater. This complex structure facilitates the transfer of tensile forces during head movements, clarifying the MDB

Keywords:
Myodural bridgeP45 plastinated slicesSuboccipital regionThree-dimensional visualization model

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Area of Science:

  • Anatomy
  • Biomechanics
  • Histology

Background:

  • The myodural bridge (MDB) connects suboccipital muscles to the cervical spinal dura mater (SDM).
  • The precise arrangement of connective tissue fibers within the MDB is not fully understood.
  • Understanding MDB structure is crucial for exploring its functional role.

Purpose of the Study:

  • To elucidate the adjacent relationship of different connective tissue fibers forming the MDB.
  • To provide a detailed structural understanding of the MDB for functional analysis.

Main Methods:

  • Utilized a three-dimensional visualization model.
  • Examined P45 plastinated slices of human MDB.
  • Analyzed histological sections of human MDB.

Main Results:

  • Identified the MDB originating from rectus capitis posterior minor (RCPmi), rectus capitis posterior major (RCPma), and obliquus capitis inferior (OCI) muscles.
  • Described distinct fiber pathways through the posterior atlanto-occipital interspace (PAOiS) and posterior atlanto-axial interspace (PAAiS).
  • Demonstrated MDB fiber fusion with the vertebral dura ligament (VDL) and cervical SDM.

Conclusions:

  • The MDB is a complex structure, termed the 'myodural bridge complex' (MDBC).
  • The MDBC likely enables effective transfer of tensile forces during head movements.
  • The MDBC concept aids in understanding the overall function of the MDB.