Understanding and misunderstanding extraocular muscle pulleys
نویسندگان
چکیده
منابع مشابه
Functional Anatomy of the Extraocular Muscle Pulleys
2. Which statement concerning the rectus extraocular muscle pulleys is correct? a. The rectus pulleys are composed of rings of cartilage. b. The rectus pulleys are rigidly attached to the walls of the orbit. c. Each rectus pulley receives an insertion from the global layer fibers of its rectus extraocular muscle. d. The global layer fibers of the extraocular muscles do not insert on the pulleys...
متن کاملEvidence for rectus extraocular muscle pulleys in rodents.
PURPOSE Extraocular rectus muscle (EOM) pulleys are important determinants of orbital biomechanics in humans. In this study, the authors evaluated orbital connective tissue morphology, specifically characterizing rectus muscle pulleys, in the rat, a species with laterally placed eyes, afoveate vision, and a less complex visuomotor repertoire than primates. METHODS Adult rat orbits were paraff...
متن کاملEvidence for active control of rectus extraocular muscle pulleys.
PURPOSE Connective tissue structures constrain paths of the rectus extraocular muscles (EOMs), acting as pulleys and serving as functional EOM origins. This study was conducted to investigate the relationship of orbital and global EOM layers to pulleys and kinematic implications of this anatomy. METHODS High-resolution magnetic resonance imaging (MRI) was used to define the anterior paths of ...
متن کاملStructure-function correlations in the human medial rectus extraocular muscle pulleys.
PURPOSE Fibroelastic pulleys function like the trochlea to fix the position and pulling direction of the recti extraocular muscles within the orbit. This study characterized the fine structure of the human medial rectus muscle pulley. METHODS Human medial rectus muscle pulley tissue was dissected at autopsy, immersed in aldehyde fixative solution, and processed for and examined with light and...
متن کاملLocation and Stability of Rectus Muscle Pulleys
Results. Data for 10 orbits of six normal subjects established the normal paths of the rectus extraocular muscles in primary gaze. Muscle paths in primary position were highly uniform across normal subjects. In secondary gaze positions, rectus muscle paths at the level of the pulleys exhibited small but consistent shifts, relative to the orbit, opposite the direction of gaze, consistent with th...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2007
ISSN: 1534-7362
DOI: 10.1167/7.11.10