Article (Scientific journals)
Complex visual discrimination is impaired after right, but not left, anterior temporal lobectomy.
Gardette, Jeremy; Mosca, Chrystèle; Asien, Cassandra et al.
2023In Hippocampus, 33 (10), p. 1113 - 1122
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Keywords :
epilepsy; lateralization; surgery; visual perception; Reaction Time; Neuropsychological Tests; Epilepsy, Temporal Lobe
Abstract :
[en] The prevailing view in human cognitive neuroscience associates the medial temporal lobes (MTLs) with declarative memory. Compelling experimental evidence has, however, demonstrated that these regions are specialized according to the representations processed, irrespective of the cognitive domain assessed. This account was supported by the study of patients with bilateral medial temporal amnesia, who exhibit impairments in perceptual tasks involving complex visual stimuli. Yet, little is known regarding the impact of unilateral MTL damage on complex visual abilities. To address this issue, we administered a visual matching task to 20 patients who underwent left (N = 12) or right (N = 8) anterior temporal lobectomy for drug-resistant epilepsy and to 38 healthy controls. Presentation viewpoint was manipulated to increase feature ambiguity, as this is critical to reveal impairments in perceptual tasks. Similar to control participants, patients with left-sided damage succeeded in all task conditions. In contrast, patients with right-sided damage had decreased accuracy compared with that of the other two groups, as well as increased response time. Notably, the accuracy of those with right-sided damage did not exceed chance level when feature ambiguity was high (i.e., when stimuli were presented from different viewpoints) for the most complex classes of stimuli (i.e., scenes and buildings, compared with single objects). The pattern reported in bilateral patients in previous studies was therefore reproduced in patients with right, but not left, resection. These results suggest that the complex visual-representation functions supported by the MTL are right-lateralized, and raise the question as to how the representational account of these regions applies to representations supported by left MTL regions.
Disciplines :
Neurosciences & behavior
Author, co-author :
Gardette, Jeremy  ;  LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France
Mosca, Chrystèle;  Neurology Department, Chu Grenoble-Alpes, Univ. Grenoble Alpes, Grenoble Institut Neuroscience, Inserm U1216, Grenoble, France
Asien, Cassandra;  LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France ; Neurology Department, Chu Grenoble-Alpes, Univ. Grenoble Alpes, Grenoble Institut Neuroscience, Inserm U1216, Grenoble, France
Borg, Céline;  Neurology Department, University Hospital, Saint-Etienne, France
Mazzola, Laure;  Neurology Department, University Hospital, Saint-Etienne, France
Convers, Philippe;  Neurology Department, University Hospital, Saint-Etienne, France
Gal, Guillaume;  Neurology Department, University Hospital, Saint-Etienne, France
Banjac, Sonja;  LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France
Baciu, Monica;  LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France
Durocher, Bastien ;  LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France
Kahane, Philippe;  Neurology Department, Chu Grenoble-Alpes, Univ. Grenoble Alpes, Grenoble Institut Neuroscience, Inserm U1216, Grenoble, France
Hot, Pascal;  LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France ; Institut Universitaire de France, Paris, France
Language :
English
Title :
Complex visual discrimination is impaired after right, but not left, anterior temporal lobectomy.
Publication date :
October 2023
Journal title :
Hippocampus
ISSN :
1050-9631
eISSN :
1098-1063
Publisher :
John Wiley and Sons Inc, United States
Volume :
33
Issue :
10
Pages :
1113 - 1122
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
The authors thank the Grenoble-Alpes and Saint-Étienne Nord University Hospitals for providing material support and allowing access to the patients. We also thank the Savoie-Mont Blanc University for financial support, and the MSH-Alpes SCREEN platform for help in recruiting volunteers for the control group.The authors thank the Grenoble‐Alpes and Saint‐Étienne Nord University Hospitals for providing material support and allowing access to the patients. We also thank the Savoie‐Mont Blanc University for financial support, and the MSH‐Alpes SCREEN platform for help in recruiting volunteers for the control group.
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