Author:
Zhang Zhao-Xi,Gong Jin,Yu Sheng-Bo,Li Chan,Sun Jing-Xian,Ding Shuai-Wen,Ma Guo-Jun,Sun Shi-Zhu,Zhou Lin,Hack Gary D.,Zheng Nan,Sui Hong-Jin
Abstract
AbstractA dense bridge-like tissue named the myodural bridge (MDB) connecting the suboccipital muscles to the spinal dura mater was originally discovered in humans. However, recent animal studies have revealed that the MDB appears to be an evolutionarily conserved anatomic structure which may have significant physiological functions. Our previous investigations have confirmed the existence of the MDB in finless porpoises. The present authors conducted research to expound on the specificity of the MDB in the porpoise Neophocana asiaeorientalis (N.asiaeorientalis). Five carcasses of N.asiaeorientalis, with formalin fixation, were used for the present study. Two of the carcasses were used for head and neck CT scanning, three-dimensional reconstructions, and gross dissection of the suboccipital region. Another carcass was used for a P45 plastination study. Also, a carcass was used for a histological analysis of the suboccipital region and also one was used for a Scanning Electron Microscopy study. The results revealed that the MDB of the N.asiaeorientalis is actually an independent muscle originating from the caudal border of the occiput, passing through the posterior atlanto-occipital interspace, and then attaches to the cervical spinal dura mater. Thus the so called MDB of the N.asiaeorientalis is actually an independent and uniquely specialized muscle. Based on the origin and insertion of this muscle, the present authors name it the ‘Occipital-Dural Muscle’. It appears that the direct pull of this muscle on the cervical spinal dura mater may affect the circulation of the cerebrospinal fluid by altering the volume of the subarachnoid space via a pumping action.
Funder
Scientific Research Fund of Liaoning Provincial Education Department
Talent Project of Revitalizing Liaoning
Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Reference45 articles.
1. Kahn, J. L., Sick, H. & Koritké, J. G. The posterior intervertebral spaces of the craniovertebral joint. Acta Anat. (Basel) 144(1), 65–70 (1992).
2. Hack, G. D. et al. Anatomic relation between the rectus capitis posterior minor muscle and the dura mater. Spine (Phila Pa 1976) 20(23), 2484–2486 (1995).
3. Dean, N. A. & Mitchell, B. S. Anatomic relation between the nuchal ligament (ligamentum nuchae) and the spinal dura mater in the craniocervical region. Clin. Anat. 15(3), 182–185 (2002).
4. Humphreys, B. et al. Investigation of connective tissue attachments to the cervical spinal dura mater. Clin. Anatomy Official J. Am. Assoc. Clin. Anatomists Br. Assoc. Clin. Anatomists 16(2), 152–159 (2003).
5. Kahkeshani, K. & Ward, P. J. Connection between the spinal dura mater and suboccipital musculature: evidence for the myodural bridge and a route for its dissection–a review. Clin. Anat. 25(4), 415–422 (2012).
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