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Lesions impairing regular versus irregular past tense production

Meteyard, L; Price, CJ; Woollams, AM; Aydelott, J; (2013) Lesions impairing regular versus irregular past tense production. NeuroImage: Clinical , 3 438 - 449. 10.1016/j.nicl.2013.10.005. Green open access

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Abstract

We investigated selective impairments in the production of regular and irregular past tense by examining language performance and lesion sites in a sample of twelve stroke patients. A disadvantage in regular past tense production was observed in six patients when phonological complexity was greater for regular than irregular verbs, and in three patients when phonological complexity was closely matched across regularity. These deficits were not consistently related to grammatical difficulties or phonological errors but were consistently related to lesion site. All six patients with a regular past tense disadvantage had damage to the left ventral pars opercularis (in the inferior frontal cortex), an area associated with articulatory sequencing in prior functional imaging studies. In addition, those that maintained a disadvantage for regular verbs when phonological complexity was controlled had damage to the left ventral supramarginal gyrus (in the inferior parietal lobe), an area associated with phonological short-term memory. When these frontal and parietal regions were spared in patients who had damage to subcortical (n = 2) or posterior temporo-parietal regions (n = 3), past tense production was relatively unimpaired for both regular and irregular forms. The remaining (12th) patient was impaired in producing regular past tense but was significantly less accurate when producing irregular past tense. This patient had frontal, parietal, subcortical and posterior temporo-parietal damage, but was distinguished from the other patients by damage to the left anterior temporal cortex, an area associated with semantic processing. We consider how our lesion site and behavioral observations have implications for theoretical accounts of past tense production. © 2013 The Authors.

Type: Article
Title: Lesions impairing regular versus irregular past tense production
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.nicl.2013.10.005
Publisher version: http://dx.doi.org/10.1016/j.nicl.2013.10.005
Additional information: © 2013 The Authors. Published by Elsevier Inc. Open access under CC BY-NC-ND license.
Keywords: Anterior temporal pole; Supramarginal gyrus; Morphology; Pars opercularis; Phonology; Regularity; Inflection;
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Imaging Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/1422001
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