MR tractography predicts visual field defects following temporal lobe resection.
A superior homonymous quadrantanopia is a well recognized complication of anterior temporal lobe resection and occurs because of disruption of the Meyer loop, the anterior part of the optic radiation. The authors used diffusion tensor imaging tractography to visualize the optic radiation before and after surgery, demonstrating the disruption of Meyer loop in a patient who developed a quadrantanopia. Preoperative imaging of the optic radiation will be useful in predicting visual field defects following temporal lobe resection.
Powell
H W R
HW
Department of Clinical and Experimental Epilepsy, Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
Parker
G J M
GJ
Alexander
D C
DC
Symms
M R
MR
Boulby
P A
PA
Wheeler-Kingshott
C A M
CA
Barker
G J
GJ
Koepp
M J
MJ
Duncan
J S
JS
D000328:Adult; D001931:Brain Mapping / Q000379:methods; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods*; D004833:Epilepsy, Temporal Lobe / Q000601:surgery; D007839:Functional Laterality / Q000502:physiology; D006423:Hemianopsia / Q000209:etiology* / Q000503:physiopathology / Q000517:prevention & control; D006801:Humans; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures / Q000009:adverse effects*; D011183:Postoperative Complications / Q000209:etiology* / Q000503:physiopathology / Q000517:prevention & control; D011237:Predictive Value of Tests; D011300:Preoperative Care / Q000379:methods; D013702:Temporal Lobe / Q000033:anatomy & histology / Q000293:injuries / Q000601:surgery*; D014794:Visual Fields / Q000502:physiology; D014795:Visual Pathways / Q000033:anatomy & histology / Q000293:injuries* / Q000503:physiopathology; D014796:Visual Perception / Q000502:physiology