Expanding repertoire in the oculomotor periphery: selective compartmental function in rectus extraocular muscles
نویسندگان
چکیده
منابع مشابه
Magnetic resonance imaging of differential compartmental function of horizontal rectus extraocular muscles during conjugate and converged ocular adduction.
Activity in horizontal rectus extraocular muscles (EOMs) was investigated by magnetic resonance imaging (MRI) of humans during asymmetric convergence to a monocularly aligned target at 15-cm distance or monocular fixation of afocal targets placed over a wide range of conjugate abduction through adduction. Cross sections and posterior partial volumes (PPVs) of EOMs were determined from quasi-cor...
متن کاملUltrastructural changes in rabbit extraocular muscles after oculomotor nerve section.
Ultrastructural changes in rabbit superior recti have been studied from 24 hours to 21 days after intracranial section of the oculomotor nerve. Earliest changes were observed in a few myelinated axons within the muscle 24 hours after nerve section. Within 48 hours, degenerative changes in the myelinated axons became manifest and fragmentation of the myelin sheaths started. During the second and...
متن کاملAbnormalities of the oculomotor nerve in congenital fibrosis of the extraocular muscles and congenital oculomotor palsy.
PURPOSE High-resolution magnetic resonance imaging (MRI) can now directly demonstrate innervation to extraocular muscles and quantify optic nerve size. A quantitative MRI technique was developed to study the oculomotor nerve (CN3) and applied to congenital fibrosis of extraocular muscles (CFEOM) and congenital oculomotor palsy. METHODS The subarachnoid portions of the CN3s were imaged with a ...
متن کاملStructure-function correlation of laminar vascularity in human rectus extraocular muscles.
PURPOSE Orbital and global layers of rectus extraocular muscles (EOMs) are believed to serve different functions. This study sought anatomic and functional evidence of differing blood flow in the two layers of rectus EOMs. METHODS Four human orbits ranging in age from 17 months to 93 years were serially sectioned and stained for muscle fibers with Masson's trichrome and for vascular smooth mu...
متن کاملNeuroanatomical Structures in Human Extraocular Muscles and Their Potential Implication in the Development of Oculomotor Disorders.
The potential role of sensory feedback from human extraocular muscles has been subjected to considerable speculation in the ophthalmic literature. Extraocular muscles pull against a fairly even load and do not initiate a stretch reflex, even when the eyes are directed toward the boundaries of their respective field of action. These unique working conditions and physiological properties have led...
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ژورنال
عنوان ژورنال: Annals of the New York Academy of Sciences
سال: 2011
ISSN: 0077-8923
DOI: 10.1111/j.1749-6632.2011.06112.x