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Microsurgical anatomy of the ocular motor nerves.
Surg Radiol Anat. 2010 Aug; 32(7):623-8.SR

Abstract

This study was designed to provide anatomic data to help surgeons avoid damage to the ocular motor nerves during intraorbital operations. The microsurgical anatomy of the ocular motor nerves was studied in 50 adult cadaveric heads (100 orbits). Dissections were performed with a microscope. The nerves were exposed and the neural and muscular relationships of each portion of the nerve were examined and measured. The superior division of the oculomotor nerve coursed between the optic nerve and the superior rectus muscle after it left the annular tendon, and its branches entered into the superior rectus muscle and levator muscle. A mean of five fibers (range 3-7) innervated the superior rectus muscle, and a mean of one fiber (range 1-2) followed a medial direction (84%) or went straight through the superior rectus muscle (16%). The inferior division of the oculomotor nerve branched into the medial rectus, inferior rectus and inferior oblique muscles. The trochlear nerve ended on the orbital side of the posterior one-third of the superior oblique muscle in 76 specimens. The abducens nerve ended on the posterior one-third of the lateral rectus muscle in 86 specimens. If the belly of the lateral rectus muscle was divided into three superior-inferior parts, the nerve commonly entered into the middle one-third in 74 specimens. Based on the observed data, microanatomical relationships of the orbital contents were revised.

Authors+Show Affiliations

Department of Neurosurgery, The First Affiliated Hospital, Harbin Medical University, 150001 Post Street, NanGang District, Harbin, Heilongjiang Province, China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19885637

Citation

Zhang, Yi, et al. "Microsurgical Anatomy of the Ocular Motor Nerves." Surgical and Radiologic Anatomy : SRA, vol. 32, no. 7, 2010, pp. 623-8.
Zhang Y, Liu H, Liu EZ, et al. Microsurgical anatomy of the ocular motor nerves. Surg Radiol Anat. 2010;32(7):623-8.
Zhang, Y., Liu, H., Liu, E. Z., Lin, Y. Z., Zhao, S. G., & Jing, G. H. (2010). Microsurgical anatomy of the ocular motor nerves. Surgical and Radiologic Anatomy : SRA, 32(7), 623-8. https://doi.org/10.1007/s00276-009-0585-9
Zhang Y, et al. Microsurgical Anatomy of the Ocular Motor Nerves. Surg Radiol Anat. 2010;32(7):623-8. PubMed PMID: 19885637.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microsurgical anatomy of the ocular motor nerves. AU - Zhang,Yi, AU - Liu,Hao, AU - Liu,En-Zhong, AU - Lin,You-Zhi, AU - Zhao,Shi-Guang, AU - Jing,Guo-Hua, Y1 - 2009/11/03/ PY - 2008/11/10/received PY - 2009/10/19/accepted PY - 2009/11/4/entrez PY - 2009/11/4/pubmed PY - 2010/12/14/medline SP - 623 EP - 8 JF - Surgical and radiologic anatomy : SRA JO - Surg Radiol Anat VL - 32 IS - 7 N2 - This study was designed to provide anatomic data to help surgeons avoid damage to the ocular motor nerves during intraorbital operations. The microsurgical anatomy of the ocular motor nerves was studied in 50 adult cadaveric heads (100 orbits). Dissections were performed with a microscope. The nerves were exposed and the neural and muscular relationships of each portion of the nerve were examined and measured. The superior division of the oculomotor nerve coursed between the optic nerve and the superior rectus muscle after it left the annular tendon, and its branches entered into the superior rectus muscle and levator muscle. A mean of five fibers (range 3-7) innervated the superior rectus muscle, and a mean of one fiber (range 1-2) followed a medial direction (84%) or went straight through the superior rectus muscle (16%). The inferior division of the oculomotor nerve branched into the medial rectus, inferior rectus and inferior oblique muscles. The trochlear nerve ended on the orbital side of the posterior one-third of the superior oblique muscle in 76 specimens. The abducens nerve ended on the posterior one-third of the lateral rectus muscle in 86 specimens. If the belly of the lateral rectus muscle was divided into three superior-inferior parts, the nerve commonly entered into the middle one-third in 74 specimens. Based on the observed data, microanatomical relationships of the orbital contents were revised. SN - 1279-8517 UR - https://www.unboundmedicine.com/medline/citation/19885637/Microsurgical_anatomy_of_the_ocular_motor_nerves_ L2 - https://dx.doi.org/10.1007/s00276-009-0585-9 DB - PRIME DP - Unbound Medicine ER -