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Author Ernst, A. ♦ blet, V. ♦ Denkova, E. ♦ Blanc, F. ♦ Seze, J. ♦ Gout, D. ♦ Manning, L.
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2015
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health
Subject Keyword Cerebral activation changes ♦ Multiple sclerosis ♦ Mental time travel ♦ Functional MRI ♦ Neurosciences ♦ Neuroradiology ♦ Neuropsychology ♦ Psychiatry
Abstract Mental time travel (MTT) entails the ability to mentally travel into autobiographical memory (AM) and episodic future thinking (EFT). While AM and EFT share common phenomenological and cerebral functional properties, distinctive characteristics have been documented in healthy and clinical populations. No report, to our knowledge, has informed on the functional underpinnings of MTT impairment in multiple sclerosis (MS) patients, hence the aim of this work. We studied 22 relapsing-remitting MS patients and 22 matched controls. Participants underwent an AM/EFT assessment using the Autobiographical Interview (Levine et al. 2002), followed by a functional MRI session. The latter consisted in AM and EFT tasks, distinguishing the construction and elaboration phases of events. The results showed impaired performance for AM and EFT in patients, accompanied by increased cerebral activations mostly located in the frontal regions, which extended to the parietal, lateral temporal and posterior regions during AM/EFT tasks, relative to healthy controls. Enhanced brain activations in MS patients were particularly evident during the EFT task and involved the hippocampus, frontal, external temporal, and cingulate regions. The construction phase required greater fronto-parieto-temporal activations in MS patients relative to both healthy controls, and the elaboration phase. Taking together, our results suggested the occurrence of cerebral activation changes in the context of MTT in MS patients, expressed by distinct and common mechanisms for AM and EFT. This study may provide new insights in terms of cerebral activation changes in brain lesion and their application to clinical settings, considering AM/EFT’s central role in everyday life.
ISSN 19317557
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2015-05-15
Publisher Place New York
e-ISSN 19317565
Journal Brain Imaging and Behavior
Volume Number 10
Issue Number 1
Page Count 18
Starting Page 296
Ending Page 313

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Source: SpringerLink