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Language and alexithymia: Evidence for the role of the inferior frontal gyrus in acquired alexithymia

Language and alexithymia: Evidence for the role of the inferior frontal gyrus in acquired alexithymia

Hobson, Hannah, Hogeveen, Jeremy, Brewer, Rebecca, Catmur, Caroline, Gordon, Barry, Krueger, Frank, Chau, Aileen, Bird, Geoffrey and Grafman, Jordan (2018) Language and alexithymia: Evidence for the role of the inferior frontal gyrus in acquired alexithymia. Neuropsychologia, 111. pp. 229-240. ISSN 0028-3932 (doi:https://doi.org/10.1016/j.neuropsychologia.2017.12.037)

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Abstract

The clinical relevance of alexithymia, a condition associated with difficulties identifying and describing one’s own emotion, is becoming ever more apparent. Increased rates of alexithymia are observed in multiple psychiatric conditions, and also in neurological conditions resulting from both organic and traumatic brain injury. The presence of alexithymia in these conditions predicts poorer regulation of one’s emotions, decreased treatment response, and increased burden on carers. While clinically important, the aetiology of alexithymia is still a matter of debate, with several authors arguing for multiple ‘routes’ to impaired understanding of one’s own emotions, which may or may not result in distinct subtypes of alexithymia. While previous studies support the role of impaired interoception (perceiving bodily states) in the development of alexithymia, the current study assessed whether acquired language impairment following traumatic brain injury, and damage to language regions, may also be associated with an increased risk of alexithymia.

Within a sample of 129 participants with penetrating brain injury and 33 healthy controls, neuropsychological testing revealed that deficits in a non-emotional language task, object naming, were associated with alexithymia, specifically with difficulty identifying one’s own emotions. Both region-of-interest and whole-brain lesion analyses revealed that damage to language regions in the inferior frontal gyrus was associated with the presence of both this language impairment and alexithymia. These results are consistent with a framework for acquired alexithymia that incorporates both interoceptive and language processes, and support the idea that brain injury may result in alexithymia via impairment in any one of a number of more basic processes.

Item Type: Article
Uncontrolled Keywords: neuropsychology, alexithymia, language, emotion, traumatic brain injury
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Faculty / Department / Research Group: Faculty of Education & Health
Faculty of Education & Health > Applied Psychology Research Group
Faculty of Education & Health > Department of Psychology, Social Work & Counselling
Last Modified: 01 Aug 2019 01:38
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: GREAT b
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/18487

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