Skip to main content
main-content

16.08.2019 | Basic Science

Detailed anatomy of the trochlear nerve in the superior oblique muscle

Zeitschrift:
Graefe's Archive for Clinical and Experimental Ophthalmology
Autoren:
Yong Seok Nam, Yooyeon Park, In-Beom Kim, Sun Young Shin
Wichtige Hinweise

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Abstract

Purpose

The purpose of this study was to elucidate the detailed anatomy of the trochlear nerve in the superior oblique muscle (SOM) and the intramuscular innervation pattern using Sihler staining.

Methods

SOMs were dissected from their origin to the insertion in 28 eyes of 14 cadavers. The following distances were determined: from the SOM insertion to the trochlear, from the trochlear to the entry site of the anterior branch or posterior branch, and the widths of the main trunk and anterior and posterior branches. Sihler staining was then performed.

Results

The trochlear nerve traveled straight ahead medially and divided. Eighteen of 28 (64.3%) orbits showed two anterior and posterior branches, six (21.4%) showed three branches, and four (14.3%) showed no branching. The most distally located intramuscular nerve ending was observed at 62.4 ± 2.4% of the length of each muscle (35.8 mm from insertion when considering that the length of the SOM was 57.4 mm) and at 29.9 ± 3.2% of the length of each muscle (17.2 mm from the trochlear). Additionally, the length of the intramuscular arborization part was 9.4 ± 1.1% of the length of the SOM (5.4 mm when considering that the length of the SOM was 57.4 mm). Nonoverlap between two intramuscular arborizations of the nerve was detected in 20 of 28 cases (71.4%). Eight cases (28.6%) showed a definite overlap of two zones.

Conclusions

This study provided a good understanding of the anatomy of the trochlear nerve in the SOM.

Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten

★ PREMIUM-INHALT
e.Med Interdisziplinär

Mit e.Med Interdisziplinär erhalten Sie Zugang zu allen CME-Fortbildungen und Fachzeitschriften auf SpringerMedizin.de. Zusätzlich können Sie eine Zeitschrift Ihrer Wahl in gedruckter Form beziehen – ohne Aufpreis.

Literatur
Über diesen Artikel

Neu im Fachgebiet Augenheilkunde

01.08.2019 | Erkrankungen der Hornhaut | CME | Ausgabe 8/2019

Neurotrophe Keratopathie

Grundlagen, Diagnostik und Therapie

22.07.2019 | DFP-Fortbildung | Ausgabe 4/2019 Open Access

Aktuelle Möglichkeiten der visuellen Rehabilitation

28.06.2019 | Neuroradiologie | CME | Ausgabe 7/2019

Neuroradiologie in der Augenheilkunde

19.06.2019 | Leitlinien, Stellungnahmen und Empfehlungen | Ausgabe 8/2019

Bewertung und Qualitätssicherung refraktiv-chirurgischer Eingriffe durch die DOG und den BVA – KRC-Empfehlungen

Stand Februar 2019