The nature of the phonological disorder in conduction aphasia.
Sequences of attempts to name pictured objects were used to examine phonological dysfunction in three diagnostic subgroups of aphasia. A prevalence of "phonologically-oriented sequences" (i.e., those sequences that contained only attempts with a phonological resemblance to the target word) was found to be a diagnostic criterion for conduction aphasia. When compared to a group of Broca's (n = 7) and Wernicke's (n = 5) aphasics, all the conduction aphasics (n = 6) produced proportionately more of such phonologically-oriented sequences on a picture naming test. An examination of the phonologically-oriented sequences produced by the conduction aphasics indicates that speech production in conduction aphasia involves dysfunction at an early stage of sound-encoding. The theoretical implications of this view are discussed.
D000328:Adult; D000849:Anomia / Q000523:psychology*; D001037:Aphasia / Q000523:psychology*; D001039:Aphasia, Broca / Q000523:psychology; D001041:Aphasia, Wernicke / Q000523:psychology*; D001930:Brain Injuries / Q000523:psychology; D002544:Cerebral Infarction / Q000523:psychology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual; D010700:Phonetics; D012660:Semantics; D013068:Speech Production Measurement