Language Deficits as a Preclinical Window into Parkinson's Disease: Evidence from Asymptomatic Parkin and Dardarin Mutation Carriers

Adolfo M. García, Lucas Sedeño, Natalia Trujillo, Yamile Bocanegra, Diana Gomez, David Pineda, Andrés Villegas, Edinson Muñoz, William Arias, Agustín Ibáñez

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Objectives: The worldwide spread of Parkinson's disease (PD) calls for sensitive and specific measures enabling its early (or, ideally, preclinical) detection. Here, we use language measures revealing deficits in PD to explore whether similar disturbances are present in asymptomatic individuals at risk for the disease. Methods: We administered executive, semantic, verb-production, and syntactic tasks to sporadic PD patients, genetic PD patients with PARK2 (parkin) or LRRK2 (dardarin) mutation, asymptomatic first-degree relatives of the latter with similar mutations, and socio-demographically matched controls. Moreover, to detect sui generis language disturbances, we ran analysis of covariance tests using executive functions as covariate. Results: The two clinical groups showed impairments in all measures, most of which survived covariation with executive functions. However, the key finding concerned asymptomatic mutation carriers. While these subjects showed intact executive, semantic, and action-verb production skills, they evinced deficits in a syntactic test with minimal working memory load. Conclusions: We propose that this sui generis disturbance may constitute a prodromal sign anticipating eventual development of PD. Moreover, our results suggest that mutations on specific genes (PARK2 and LRRK2) compromising basal ganglia functioning may be subtly related to language-processing mechanisms.

Original languageEnglish
Pages (from-to)150-158
Number of pages9
JournalJournal of the International Neuropsychological Society
Volume23
Issue number2
DOIs
StatePublished - 1 Feb 2017

Keywords

  • Genetic Parkinson's disease
  • LRRK2
  • PARK2
  • Preclinical mutation carriers
  • Sporadic Parkinson's disease
  • language

Fingerprint

Dive into the research topics of 'Language Deficits as a Preclinical Window into Parkinson's Disease: Evidence from Asymptomatic Parkin and Dardarin Mutation Carriers'. Together they form a unique fingerprint.

Cite this