| Téléchargement | - Voir le manuscrit accepté : Tractography of meyer's loop asymmetries (PDF, 893 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1016/j.eplepsyres.2014.03.006 |
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| Auteur | Rechercher : Dreessen de Gervai, P.1; Rechercher : Sboto-Frankenstein, U.N.; Rechercher : Bolster, R.B.; Rechercher : Thind, S.; Rechercher : Gruwel, M.L.H.1; Rechercher : Smith, S.D.; Rechercher : Tomanek, B. |
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| Affiliation | - Conseil national de recherches du Canada. Développement des cultures et des ressources aquatiques
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| Format | Texte, Article |
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| Sujet | Meyer's Loop; Asymmetry; Optic radiations; Diffusion tensor imaging |
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| Résumé | Purpose: The purpose of the current study was to use diffusion tensor imaging (DTI) to conduct tractography of the optic radiations (OR) and its component bundles and to assess both the degree of hemispheric asymmetry and the inter-subject variability of Meyer's Loop (ML). We hypothesized that there are significant left versus right differences in the anterior extent of ML to the temporal pole (TP) in healthy subjects. Materials and methods: DTI data were acquired on a 3. T Siemens MRI system using a single-shot Spin Echo EPI sequence. The dorsal, central and ML bundles of the OR were tracked and visualized in forty hemispheres of twenty healthy volunteers. The uncinate fasciculus (UF) was also tracked in these subjects so that it could be used as a distinct anatomical reference. Measurements were derived for the distance between ML-TP, ML and the temporal horn (ML-TH) and ML and the uncinate fasciculus (ML-UF). Paired difference t-tests were carried out with SPSS 14.0. Results: ML and the UF were successfully tracked and visualized in all 20 volunteers. Significant hemispheric asymmetries were found for all measurements with left distances shorter than the right (P < 0.005). In 50% of the subjects the left ML-UF distance was ≤1.9. mm. Conclusion: The results support our hypothesis and demonstrate that left ML-TP distances are significantly shorter than right ML-TP distances. These asymmetries are also reflected in shorter left distances between ML-TH and ML-UF. Moreover, these results are of interest to left-sided temporal lobe epilepsy surgery because it is not only more likely to disturb the anterior extent of ML but also renders the often closely located posterior aspect of the left UF more vulnerable to potential surgical impact. |
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| Date de publication | 2014 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro du CNRC | NRC-ACRD-56053 |
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| Numéro NPARC | 21272153 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 35f40862-66f3-43b7-8322-b9e3630fcd70 |
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| Enregistrement créé | 2014-07-23 |
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| Enregistrement modifié | 2020-06-04 |
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