Meyers Loop Mri, Https Discovery Ucl Ac Uk Id Eprint 10095199 1 Fnins 14 00269 Pdf

Carry information from the superior part of the visual field.

Rainbow dash coloring pages equestria girls. This review addresses the complex and often controversial anatomy of the anterior bundle of the or also known as the meyer loop. Anatomy of the visual pathway. Must pass through the temporal lobe by looping around the inferior horn of the lateral ventricle.

At this point its anterior border is 45mm anterior to the temporal horn and is intermingled with. Yogarajah et al 2009. Recent reports have estimated a temporal pole to meyers loop distance variation of 2244 mm barton et al 2005.

Fibers from the inferior retina also called meyers loop or archambaults loop. Methods 57 patients with epilepsy were identified with language functional mri fmri and diffusion mri acquisition. Before the advent of mr imaging 2 main types of studies attempted to ascertain the safe distance for anterior temporal lobe resection to avoid postsurgical vfds.

Objectives several studies have suggested an asymmetry in meyers loop in individuals with the left loop anterior to the right. There were those based first on postoperative vfd correlation and second on anatomic. As temporal lobe resections for.

A lesion in the temporal lobe that results in damage to meyers loop causes a characteristic loss of vision in a. Anterior bundle meyer loop the anterior bundle meyer loop travels anterolaterally along the roof of the temporal horn of the lateral ventricle prior to taking a sharp turn anteroinferiorly around the temporal horn of the lateral ventricle. Neuroanatomy video lab brain dissections duration.

11 a significant asymmetry was found with mean meyers loop temporal pole distances measured as 397 mm on the left and 455 mm on the right. Yogarajah et al 2009. In a recent study deterministic tractography was applied to 20 healthy right handed volunteers to look for asymmetry in the anterior extent of meyers loop in individual subjects.

The meyer loop is part of the inferior optic radiation that sweeps back on itself into the temporal lobe just lateral to the temporal horn of the lateral ventricleit can be injured in temporal lobectomy resulting in a superolateral field cut the so called pie in the sky field cut. The distance between the most anterior part of meyers loop and the temporal pole varies widely between individuals barton et al 2005. This pathway its correlation with the temporal horn and its implications for temporal lobe surgery are reviewed.

The aim of this study was to evaluate meyers loop by 3 t mri with fiber tractography color coded fractional anisotropy maps and eigenvector maps. Axial illustration showing the optic pathway and its relation with the ventricular system. The anteroposterior distance from the anterior bundle of the meyers loop to temporal pole ranged from 263 to 34 mm overlapping with the previously published anatomical dissection studies.