A PDP Simulation of the Effects of Transcranial Magnetic Stimulation on Semantic Cognition

Mark Drakesmith, Gorana Pobric, Stephen Welbourne

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Transcranial magnetic stimulation (TMS) is a useful tool for determining cortical interactions that take place during semantic cognition (Pobric et al, 2007). TMS of the anterior temporal lobe (ATL) induces specificity-graded conceptual breakdown of stored representations resulting in differential effects on naming tasks depending on the level of specificity required. This paper aims to elucidate this effect using the Rogers et al (2004) model of semantic cognition. TMS effects are modelled by reducing the gain of the affected units to simulate reduction in neuronal sensitivity. Results show that basic-level naming is more robust to rTMS than subordinate level naming as found by Pobric et al. In addition the model predicts that superordinate naming should be even more robust to rTMS than basic level naming. This specificity-graded breakdown of semantic memory appears to be independent of learnt word frequency. This supports evidence that the ATL’s function is that of category differentiation
Original languageEnglish
Title of host publicationProceedings of the 31th Annual Conference of the Cognitive Science Society
PublisherCognitive Science Society
Pages508-513
Number of pages6
ISBN (Print)9780976831853
Publication statusPublished - 2009
Event31st Annual Meeting of the Cognitive Science Society - Amsterdam, Netherlands
Duration: 29 Jul 20091 Aug 2009

Conference

Conference31st Annual Meeting of the Cognitive Science Society
Abbreviated titleCogSci 2009
Country/TerritoryNetherlands
CityAmsterdam
Period29/07/091/08/09

Fingerprint

Dive into the research topics of 'A PDP Simulation of the Effects of Transcranial Magnetic Stimulation on Semantic Cognition'. Together they form a unique fingerprint.

Cite this