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Behav. Sci. 2018, 8(10), 92; https://doi.org/10.3390/bs8100092

Relation of Structural and Functional Changes in Auditory and Visual Pathways after Temporal Lobe Epilepsy Surgery

1
Epilepsy Surgery Program, International Center for Neurological Restoration, 25th Ave, No 15805, PC 11300 Havana, Cuba
2
Imaging Department, International Center for Neurological Restoration, 25th Ave, No 15805, PC 11300 Havana, Cuba
3
Clinical Department, International Center for Neurological Restoration, 25th Ave, No 15805, PC 11300 Havana, Cuba
*
Author to whom correspondence should be addressed.
Received: 14 August 2018 / Revised: 1 October 2018 / Accepted: 5 October 2018 / Published: 12 October 2018
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Abstract

Auditory and visual pathways may be affected as a consequence of temporal lobe epilepsy surgery because of their anatomical relationships with this structure. The purpose of this paper is to correlate the results of the auditory and visual evoked responses with the parameters of tractography of the visual pathway, and with the state of connectivity between respective thalamic nuclei and primary cortices in both systems after the surgical resection of the epileptogenic zone in drug-resistant epileptic patients. Tractography of visual pathway and anatomical connectivity of auditory and visual thalamus-cortical radiations were evaluated in a sample of eight patients. In general, there was a positive relationship of middle latency response (MLR) latency and length of resection, while a negative correlation was found between MLR latency and the anatomical connection strength and anatomical connection probability of the auditory radiations. In the visual pathway, significant differences between sides were found with respect to the number and length of tracts, which was lower in the operated one. Anatomical connectivity variables and perimetry (visual field defect index) were particularly correlated with the latency of P100 wave which was obtained by quadrant stimulation. These results demonstrate an indirect functional modification of the auditory pathway and a direct traumatic lesion of the visual pathway after anterior temporal lobectomy in patients with drug resistant epilepsy. View Full-Text
Keywords: auditory evoked responses; connectivity; drug-resistant epilepsy; temporal lobectomy; tractography; visual evoked potentials auditory evoked responses; connectivity; drug-resistant epilepsy; temporal lobectomy; tractography; visual evoked potentials
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Báez-Martín, M.M.; Morales-Chacón, L.M.; García-Maeso, I.; Estupiñán-Díaz, B.; García-Navarro, M.E.; Pérez Téllez, Y.; Lorigados-Pedre, L.; Quintanal-Cordero, N.; Valdés-Llerena, R.; González González, J.; Garbey-Fernández, R.; Cabrera-Abreu, I.; Alarcón-Calaña, C.; Bender del Busto, J.E.; Rodríguez Rojas, R.; Batista García-Ramó, K.; Galvizu Sánchez, R. Relation of Structural and Functional Changes in Auditory and Visual Pathways after Temporal Lobe Epilepsy Surgery. Behav. Sci. 2018, 8, 92.

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