title: Patterns of linguistic and numerical performance in aphasia.
abstract: BACKGROUND
  Empirical research on the relationship between linguistic and numerical processing revealed inconsistent results for different levels of cognitive processing (e.g., lexical, semantic) as well as different stimulus materials (e.g., Arabic digits, number words, letters, non-number words). Information of dissociation patterns in aphasic patients was used in order to investigate the dissociability of linguistic and numerical processes. The aim of the present prospective study was a comprehensive, specific, and systematic investigation of relationships between linguistic and numerical processing, considering the impact of asemantic vs. semantic processing and the type of material employed (numbers compared to letters vs. words).
  
  
  METHODS
  A sample of aphasic patients (n = 60) was assessed with a battery of linguistic and numerical tasks directly comparable for their cognitive processing levels (e.g., perceptual, morpho-lexical, semantic).
  
  
  CONCLUSIONS
  Mean performance differences and frequencies of (complementary) dissociations in individual patients revealed the most prominent numerical advantage for asemantic tasks when comparing the processing of numbers vs. letters, whereas the least numerical advantage was found for semantic tasks when comparing the processing of numbers vs. words. Different patient subgroups showing differential dissociation patterns were further analysed and discussed. A comprehensive model of linguistic and numerical processing should take these findings into account.
authors: Department of Neurology, Section Neuropsychology, University Hospital, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany. rath@neuropsych.rwth-aachen.de.
authors: Dajana
authors: D
authors: Rath
authors: Institute of Germanic Linguistics, University of Marburg, Marburg, Germany. domahs@uni-marburg.de.
authors: Frank
authors: F
authors: Domahs
authors: Department of Neurology, Section Clinical and Cognitive Neurosciences, University Hospital, RWTH Aachen University, Aachen, Germany. kdressel@ukaachen.de.
authors: Katharina
authors: K
authors: Dressel
authors: Kliniken Schmieder Konstanz and Lurija Institute for Rehabilitation Research and Health Sciences at the University of Konstanz, Konstanz, Germany. D.Claros-Salinas@kliniken-schmieder.de.
authors: Dolores
authors: D
authors: Claros-Salinas
authors: Department of Neurology, Section Neuropsychology, University Hospital, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany. elise.klein@uni-tuebingen.de.|Interdisciplinary Centre for Clinical Research Aachen, RWTH Aachen University, Aachen, Germany. elise.klein@uni-tuebingen.de.|Knowledge Media Research Centre, IWM-KMRC, Tuebingen, Germany. elise.klein@uni-tuebingen.de.
authors: Elise
authors: E
authors: Klein
authors: Department of Neurology, Section Neuropsychology, University Hospital, RWTH Aachen University, Pauwelsstraße 30, 52074, Aachen, Germany. kwillmes-vonhincke@ukaachen.de.|Interdisciplinary Centre for Clinical Research Aachen, RWTH Aachen University, Aachen, Germany. kwillmes-vonhincke@ukaachen.de.
authors: Klaus
authors: K
authors: Willmes
authors: Department of Child and Adolescent Psychiatry, Section Child Neuropsychology, University Hospital, RWTH Aachen University, Aachen, Germany. hkrinzinger@ukaachen.de.
authors: Helga
authors: H
authors: Krinzinger
mesh_terms: D000328:Adult; D000368:Aged; D001037:Aphasia / Q000523:psychology*; D003071:Cognition; D032882:Comprehension; D005260:Female; D005783:Gender Identity; D006801:Humans; D019359:Knowledge; D007802:Language; D008037:Linguistics; D008297:Male; D008433:Mathematics; D011939:Mental Recall; D008875:Middle Aged; D009483:Neuropsychological Tests; D011446:Prospective Studies; D011597:Psychomotor Performance; D011932:Reading; D012660:Semantics; D055815:Young Adult
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