Anterior Temporal Lobe Morphometry Predicts Categorization Ability.

Béatrice Garcin, Marika Urbanski, Michel Thiebaut de Schotten, Richard Levy, Emmanuelle Volle
Front. Hum. Neurosci.. 2018-02-07; 12:
DOI: 10.3389/fnhum.2018.00036

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1. Front Hum Neurosci. 2018 Feb 7;12:36. doi: 10.3389/fnhum.2018.00036. eCollection

Anterior Temporal Lobe Morphometry Predicts Categorization Ability.

Garcin B(1)(2), Urbanski M(1)(3)(4), Thiebaut de Schotten M(1)(4)(5), Levy
R(1)(2), Volle E(1)(4).

Author information:
(1)Frontlab, Institut du Cerveau et de la Moelle épinière (ICM), UPMC UMRS 1127,
Inserm U 1127, CNRS UMR 7225, Paris, France.
(2)Department of Neurology, Salpêtrière Hospital AP-HP, Paris, France.
(3)Service de Médecine et Réadaptation, Hôpitaux de Saint-Maurice, Saint-Maurice,
(4)Brain Connectivity and Behaviour Group, Institut du Cerveau et de la Moelle
Epinière, Paris, France.
(5)Centre de NeuroImagerie de Recherche, Institut du Cerveau et de la Moelle
Epinière, Paris, France.

Categorization is the mental operation by which the brain classifies objects and
events. It is classically assessed using semantic and non-semantic matching or
sorting tasks. These tasks show a high variability in performance across healthy
controls and the cerebral bases supporting this variability remain unknown. In
this study we performed a voxel-based morphometry study to explore the
relationships between semantic and shape categorization tasks and brain
morphometric differences in 50 controls. We found significant correlation between
categorization performance and the volume of the gray matter in the right
anterior middle and inferior temporal gyri. Semantic categorization tasks were
associated with more rostral temporal regions than shape categorization tasks. A
significant relationship was also shown between white matter volume in the right
temporal lobe and performance in the semantic tasks. Tractography revealed that
this white matter region involved several projection and association fibers,
including the arcuate fasciculus, inferior fronto-occipital fasciculus, uncinate
fasciculus, and inferior longitudinal fasciculus. These results suggest that
categorization abilities are supported by the anterior portion of the right
temporal lobe and its interaction with other areas.

DOI: 10.3389/fnhum.2018.00036
PMCID: PMC5808329
PMID: 29467637

Auteurs Bordeaux Neurocampus