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Neurology. 2005 Aug 23;65(4):596-9.

MR tractography predicts visual field defects following temporal lobe resection.

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Department of Clinical and Experimental Epilepsy, Institute of Neurology, Queen Square, London, WC1N 3BG, UK.


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.

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