Abstract:
:For social interactions to be successful, individuals must establish shared mental representations that allow them to reach a common understanding and "get on the same page". We refer to this process as social coordination. While examples of social coordination are ubiquitous in daily life, relatively little is known about the neuroanatomic basis of this complex behavior. This is particularly true in a language context, as previous studies have used overly complex paradigms to study this. Although traditional views of language processing and the recent interactive-alignment account of conversation focus on peri-Sylvian regions, our model of social coordination predicts prefrontal involvement. To test this hypothesis, we examine the neural basis of social coordination during conversational exchanges in non-aphasic patients with behavioral variant frontotemporal degeneration (bvFTD). bvFTD patients show impairments in executive function and social comportment due to disease in frontal and anterior temporal regions. To investigate social coordination in bvFTD, we developed a novel language-based task that assesses patients' ability to convey an object's description to a conversational partner. Experimental conditions manipulated the amount of information shared by the participant and the conversational partner, and the associated working memory demands. Our results indicate that, although patients did not have difficulty identifying the features of the objects, they did produce descriptions that included insufficient or inappropriate adjectives and thus struggled to communicate effectively. Impaired performance was related to gray matter atrophy particularly in medial prefrontal and orbitofrontal cortices. Our findings suggest an important role for non-language brain areas that belong to a large-scale neurocognitive network for social coordination.
journal_name
Neuropsychologiajournal_title
Neuropsychologiaauthors
Healey ML,McMillan CT,Golob S,Spotorno N,Rascovsky K,Irwin DJ,Clark R,Grossman Mdoi
10.1016/j.neuropsychologia.2015.01.028subject
Has Abstractpub_date
2015-03-01 00:00:00pages
56-66eissn
0028-3932issn
1873-3514pii
S0028-3932(15)00035-4journal_volume
69pub_type
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