Reduced N400 semantic priming effects in adult survivors of paediatric and adolescent traumatic brain injury  

Oleh:

Knuepffer, C. ; Murdoch, B.E. ; Lloyd, D. ; Lewis, F.M. ; Hinchliffe, F.J.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 123 no. 1 (2012), page 52-63.
Topik: Paediatric Traumatic brain injury Diffuse axonal injury Event-related potential Semantic priming N400 Long-term outcomes Language
Fulltext: 123_01_Knuepffer.pdf (468.2KB)

Isi artikel

The immediate and long-term neural correlates of linguistic processing deficits reported following paediatric and adolescent traumatic brain injury (TBI) are poorly understood. Therefore, the current research investigated event-related potentials (ERPs) elicited during a semantic picture–word priming experiment in two groups of highly functioning individuals matched for various demographic variables and behavioural language performance. Participants in the TBI group had a recorded history of paediatric or adolescent TBI involving injury mechanisms associated with diffuse white matter pathology, while participants in the control group never sustained any insult to the brain. A comparison of N400 Mean Amplitudes elicited during three experimental conditions with varying semantic relatedness between the prime and target stimuli (congruent, semantically related, unrelated) revealed a significantly smaller N400 response in the unrelated condition in the TBI group, indicating residual linguistic processing deviations when processing demands required the quick detection of a between-category (unrelated) violation of semantic expectancy.

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