Processing Lexical Ambiguities in Word Triplets: Evidence of Lexical-Semantic Deficits Following Dominant Nonthalamic Subcortical Lesions

Lexical-semantic function was investigated in 10 participants with lesions of the dominant nonthalamic subcortical (NS) region and a matched normal control group. Participants performed speeded lexical decisions on the 3rd member of auditorily presented word triplets. The 4 critical triplet conditio...

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Bibliographic Details
Published in:Neuropsychology 2000-07, Vol.14 (3), p.379-390
Main Authors: Copland, David A, Chenery, Helen J, Murdoch, Bruce E
Format: Article
Language:English
Subjects:
Adult and adolescent clinical studies
Aged
Aphasia - psychology
Biological and medical sciences
Brain - abnormalities
Brain Damage
Cognitive Processes
Cues
Female
Human
Humans
Language
Language and communication disorders
Lexical Decision
Magnetic Resonance Imaging
Male
Medical sciences
Mental Processes - physiology
Middle Aged
Neuropsychological Tests
Neuropsychology
Psychology. Psychoanalysis. Psychiatry
Psychomotor Performance - physiology
Psychopathology. Psychiatry
Reaction Time - physiology
Response Latency
Semantics
Time Factors
Tomography, X-Ray Computed
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Summary:Lexical-semantic function was investigated in 10 participants with lesions of the dominant nonthalamic subcortical (NS) region and a matched normal control group. Participants performed speeded lexical decisions on the 3rd member of auditorily presented word triplets. The 4 critical triplet conditions were concordant ( coin-bank-money ), discordant ( river-bank-money ), neutral ( day-bank-money ), and unrelated ( river-day-money ). When the interstimulus interval (ISI) between the words in the triplets was 100 ms, patients with NS lesions obtained priming that indicated nonselective lexical access; at 1,250-ms ISI, however, there was no significant priming effect. This pattern of results is consistent with the view that patients with NS lesions can automatically access lexical-semantic information but may be unable to sustain lexical activation through controlled or attentional forms of processing.
ISSN:0894-4105
1931-1559
DOI:10.1037/0894-4105.14.3.379