Abstract:
:It is well established that the time to name target objects can be influenced by the presence of categorically related versus unrelated distractor items. A variety of paradigms have been developed to determine the level at which this semantic interference effect occurs in the speech production system. In this study, we investigated one of these tasks, the postcue naming paradigm, for the first time with fMRI. Previous behavioural studies using this paradigm have produced conflicting interpretations of the processing level at which the semantic interference effect takes place, ranging from pre- to post-lexical. Here we used fMRI with a sparse, event-related design to adjudicate between these competing explanations. We replicated the behavioural postcue naming effect for categorically related target/distractor pairs, and observed a corresponding increase in neuronal activation in the right lingual and fusiform gyri-regions previously associated with visual object processing and colour-form integration. We interpret these findings as being consistent with an account that places the semantic interference effect in the postcue paradigm at a processing level involving integration of object attributes in short-term memory.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Hocking J,McMahon KL,de Zubicaray GIdoi
10.1016/j.neuroimage.2009.12.067subject
Has Abstractpub_date
2010-04-01 00:00:00pages
796-801issue
2eissn
1053-8119issn
1095-9572pii
S1053-8119(09)01356-1journal_volume
50pub_type
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