engleski

Reduced memory traces for words during automatic lexical processing in aphasic subjects: a mismatch negativity study

The aim of this study is to investigate the influences of left hemisphere stroke in patients with comprehension deficits in the automatic processing of lexical contrast and the relationship between MMN responses and behavioral results. Word- related enhancement observed in both subject groups supports the notion of “word advantage effect” and existence of memory trace for words in human brain as it has been reported by previous studies in the literature. Lower amplitude and prolonged latency of MMN response in aphasic subjects compared to control subjects lead to the conclusion that memory trace for words is weaker in aphasic patients with comprehension difficulties which can be an indicator of difficulties of automatic lexical processing. One way this study expands previous research is that it found that the more severe the language comprehension disabilities, the more likely people with aphasia will falsely identify pseudowords as real words, which was seen in the amplitude enhancement of MMN response in the pseudowords condition in the patients with more severe comprehension disabilities.

S Aphasia ; stroke ; comprehension disabilities ; lexical processing ; memory trace ; ERP ; MMN

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