rTMS evidence for a dissociation in short-term memory for spoken words and nonwords

Savill, Nicola J., Cornelissen, Piers, Pahor, Anja and Jefferies, Elizabeth (2019) rTMS evidence for a dissociation in short-term memory for spoken words and nonwords. Cortex, 112. pp. 5-22. ISSN 0010-9452

Savill et al - rTMS evidence for a dissociation in short-term memory for spoken words and nonwords AAM.pdf - Accepted Version
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Official URL: https://doi.org/10.1016/j.cortex.2018.07.021


Differing patterns of verbal short-term memory (STM) impairment have provided unique insights into the relationship between STM and broader language function. Lexicality effects (i.e., better recall for words than nonwords) are larger in patients with phonological deficits following left temporoparietal lesions, and smaller in patients with semantic impairment and anterior temporal damage, supporting linguistic accounts of STM. However, interpretation of these patient dissociations are complicated by (i) non-focal damage and (ii) confounding factors and secondary impairments. This study addressed these issues by examining the impact of inhibitory transcranial magnetic stimulation (TMS) on auditory-verbal STM performance in healthy individuals. We compared the effects of TMS to left anterior supramarginal gyrus (SMG) and left anterior middle temporal gyrus (ATL) on STM for lists of nonwords and random words. SMG stimulation disrupted nonword recall, in a pattern analogous to that observed in patients, compatible with a role for this site in processing speech sounds without support from long-term lexical-semantic representations. Stimulation of ATL, a semantic site, disrupted the recall of words but not nonwords. A visual pattern memory task indicated that these effects of TMS were restricted to the verbal domain. These data provide convergent evidence for the conclusions of neuropsychological studies that support linguistic accounts of verbal STM.

Item Type: Article
Uncontrolled Keywords: TMS; Verbal short-term memory; Semantic; Supramarginal gyrus; Anterior temporal lobe
Subjects: C800 Psychology
Department: Faculties > Health and Life Sciences > Psychology
Depositing User: Paul Burns
Date Deposited: 30 Aug 2018 13:57
Last Modified: 01 Aug 2021 10:52
URI: http://nrl.northumbria.ac.uk/id/eprint/35526

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