期刊
DEMENTIA AND GERIATRIC COGNITIVE DISORDERS
卷 49, 期 6, 页码 589-597出版社
KARGER
DOI: 10.1159/000511341
关键词
Semantic variant primary progressive aphasia; Socioemotional detachment; Corticolimbic networks
资金
- US National Institute of Deafness and Communication Disorders [R01 DC014296]
- National Institute on Aging [P30 AG062241]
The study identified specific socioaffective deficits in svPPA patients, with atrophy in the affiliation network correlating with socioemotional detachment and atrophy in the aversion network correlating with inappropriate trusting. However, atrophy in the perception network did not show a predicted association with lack of attention to social cues.
Background: Although traditionally conceptualized as a language disorder, semantic variant primary progressive aphasia (svPPA) is often accompanied by significant behavioral and affective symptoms which considerably increase disease morbidity. Specifically, these neuropsychiatric symptoms are characterized by breaches in normative socioaffective function, for example, an inability to read social cues, excessive trusting of others, and decreased empathy. Our prior neuroimaging work identified 3 corticolimbic networks anchored in the amygdala, temporal pole, and frontoinsular cortex: an affiliation network, theorized to mediate social approach behavior; an aversion network, theorized to subserve the appraisal of social threat; and a perception network, theorized to mediate the detection of social cues. We hy-pothesized that degeneration of these networks could provide neuroanatomical substrates for socioaffective deficits in svPPA. Methods: We examined hypothesized relationships between subscores on the Social Impairment Rating Scale (SIRS) and atrophy in each of these 3 networks in a group of 16 svPPA patients (using matched cognitively normal controls as a reference). Results: Consistent with our predictions, the magnitude of atrophy in the affiliation network in svPPA patients correlated with the SIRS subscore of socioemotional detachment, while the magnitude of atrophy in the aversion network in svPPA patients correlated with the SIRS subscore of inappropriate trusting. We did not find the predicted association between perception network atrophy and the SIRS subscore of lack of attention to social cues. Conclusion: These findings highlight specific socioaffective deficits in svPPA and provide a neuroanatomical basis for these impairments by linking them to networks commonly targeted in this disorder.
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