Cervical nerve roots and the dural sheath: a histological study using human fetuses near term

• 발행기관: 대한해부학회
• 저자명: Kei Kitamura Masahito Yamamoto Yoshinosuke Hirota Noriyuki Sato Toshimasa Machida Noboru Ishikawa Hitoshi Yamamoto Gen Murakami Shinichi Abe
• 간행물 정보: 『Anatomy and Cell Biology』Vol.53(4), 451~459쪽, 전체 9쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2020.12.30

영문 초록

We have previously reported that the thoracolumbar posterior nerve root shows a tortuous epidural course, based on studies of human fetuses near term. For comparison with the cervical nerve, examinations were conducted using frontal, sagittal and horizontal sections of cervical vertebrae from 22 fetuses at 30-38 weeks of gestation. The cervical nerve root showed a short, straight and lateral course near the zygapophysial joint. Multiple rather than single bundles of the cervical posterior root seemed to account for the majority of sensory nerve fibers innervating the upper extremity. Fasciculation of rootlets was evident near the thoracolumbar spinal cord, whereas it was seen in the dural pocket at the nerve exit from the dural sac although both sites were subdural. As in the thoracolumbar region, the nerve sheath was continuous with the dura mater and independently surrounded each of the anterior and posterior roots. Radicular arteries were few in the cervical region. In 2 of the 22 fetuses (31 weeks and 33 weeks), there was a segmental, unilateral abnormality of nerve rootlet fasciculation where the dorsal root ganglion was located lateral or peripheral to the intervertebral region. Long nerve roots running inferiorly are a necessary adaptation to the delayed and marked growth of the thoracolumbar vertebral column. In children, the cervical nerve roots are likely to be affected by movement or dislocation of the vertebrae. The segmental abnormality of the cervical nerve root may be linked to rare variations in the brachial plexus.

목차

Introduction

Materials and Methods

Results

Discussion

ORCID

Author Contributions

Conflicts of Interest

Acknowledgements

References

키워드

Spinal nerve Fetuses Anatomy