Local Deformation of Extraocular Muscles during Eye Movement
نویسندگان
چکیده
منابع مشابه
Local deformation of extraocular muscles during eye movement.
PURPOSE To study extraocular muscle (EOM) function, the local physiologic contraction and elongation (deformation) along human horizontal EOMs were quantified by using motion-encoded magnetic resonance imaging (MRI). METHODS Eleven subjects (healthy right eye) gazed at a target that moved horizontally in a sinusoidal fashion (period, 2 seconds; amplitude, +/-20 degrees), during MRI with an op...
متن کاملExtraocular muscle deformation assessed by motion-encoded MRI during eye movement in healthy subjects.
Conventional magnetic resonance imaging (MRI) is useful for assessing morphological changes but not for assessing deformations inside homogeneous structures (M. D. Abràmoff, A. P. Van Gils, G. H. Jansen, & M. P. Mourits, 2000). Since no intrinsic contrast can be imaged for distinguishing heterogeneous patterns of muscle contraction, morphological changes along the length of the extraocular musc...
متن کاملCSPAMM Tagging of the Extraocular Muscles during Eye Motion: New Insights
Introduction: The pattern of the lack of movement within the orbit has not been understood yet [1]. Therefore, there is a need, in complex disorders of the orbit, to better understand the dynamics of ocular movements for potentiating more effective surgery. The cerebral architecture of eye movement control can be investigated using e.g. fMRI, while the neuronal activity and pathways can be dete...
متن کاملNeurophysiology of extraocular muscles.
E. lye movements may be divided grossly into "tonic" and "phasic" movements. Are both of these principal types produced by the same motor nerves and muscle fibers, or are separate systems present that are functionally suited to each of the types of movements? Morphological and physiological studies demonstrate that at least two and possibly three neuromuscular systems are present in eye muscles...
متن کاملMagnetic Resonance Imaging of Human Extraocular Muscles During Static Ocular Counter-rolling Extraocular Muscle MRI During Ocular Counter-rolling by
249 words; text 6,646 words; 8 figures. Articles in PresS. J Neurophysiol (July 20, 2005). doi:10.1152/jn.01157.2004 Copyright © 2005 by the American Physiological Society. Demer and Clark Extraocular Muscle MRI During Ocular Counter-rolling JN-01157-2004.R2, page 2 Abstract The rectus extraocular muscle (EOM) pulleys constrain EOM paths. During visual fixation with head immobile, actively-cont...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2009
ISSN: 1552-5783
DOI: 10.1167/iovs.08-3182