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Behavioural Neurology
Volume 2016 (2016), Article ID 6423461, 6 pages
http://dx.doi.org/10.1155/2016/6423461
Research Article

Cognitive Impairment Involving Social Cognition in SPG4 Hereditary Spastic Paraplegia

1University Hospital of Besançon, CH Jean Minjoz, Besançon, France
2Regional Hospital of Dole, CH Louis Pasteur, Dole, France

Received 26 May 2016; Revised 20 July 2016; Accepted 1 August 2016

Academic Editor: Luigi Trojano

Copyright © 2016 Ludivine Chamard et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives. To describe cognitive assessment including social cognition in SPG4 patients. Methods. We reported a series of nine patients with SPG4 mutation with an extensive neuropsychological examination including social cognition assessment. Results. None of our patients presented with mental retardation or dementia. All presented with mild cognitive impairment with a high frequency of attention deficit (100%), executive disorders (89%), and social cognition impairment (78%). An asymptomatic patient for motor skills presented with the same cognitive profile. No correlation was found in this small sample between cognitive impairment and motor impairment, age at disease onset, or disease duration. Conclusions. SPG4 phenotypes share some cognitive features of frontotemporal lobar degeneration and amyotrophic lateral sclerosis. Cognitive disorders including executive disorders and social cognition impairment are frequent in SPG4 patients and might sometimes occur before motor disorders. Therefore, cognitive functions including social cognition should be systematically assessed in order to improve the clinical management of this population.