Pre-Lexical Disorders in Repetition Conduction Aphasia

Autor/inn/en	Sidiropoulos, Kyriakos; de Bleser, Ria; Ackermann, Hermann; Preilowski, Bruno
Titel	Pre-Lexical Disorders in Repetition Conduction Aphasia
Quelle	In: Neuropsychologia, 46 (2008) 14, S.3225-3238 (14 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0028-3932
DOI	10.1016/j.neuropsychologia.2008.07.026
Schlagwörter	Speech; Psycholinguistics; Phonemes; Aphasia; Auditory Perception; Short Term Memory; Word Recognition; Dictionaries; Reading Ability; Word Processing; Models; Computer Simulation; Cognitive Processes + Suchen Sie Ihr Suchwort? Speaking; Sprechen; Psycholinguistik; Fonem; Expressive Aphasie; Aphasie; Auditive Wahrnehmung; Akustische Wahrnehmung; Akustik; Kurzzeitgedächtnis; Worterkennung; Dictionary; Wörterbuch; Reading competence; Lesekompetenz; Textverarbeitung; Analogiemodell; Computergrafik; Computersimulation; Cognitive process; Kognitiver Prozess
Abstract	At the level of clinical speech/language evaluation, the repetition type of conduction aphasia is characterized by repetition difficulties concomitant with reduced short-term memory capacities, in the presence of fluent spontaneous speech as well as unimpaired naming and reading abilities. It is still unsettled which dysfunctions of the pre-lexical processing stage of spoken word recognition contribute to this syndrome and whether there is any relevant top-down impact of the mental lexicon upon the phonetic/phonological level of speech perception. In order to further specify the underlying pathomechanisms, a comprehensive battery of psycholinguistic tests was applied to a patient suffering from repetition conduction aphasia. The obtained results point at a pre-lexical disorder in this subject. To further specify the assumed pre-lexical dysfunction, computer simulations of single-word processing, based upon an interactive activation model (IAM), were conducted. An attenuation of the features-to-phonemes inhibition value was found to simulate the observed profile of psycholinguistic deficits. Conceivably, these pre-lexical disorders interfere with the task-dependent adjustment of the temporal windows of signal analysis, giving rise to compromised sequencing of auditory-verbal information. (Contains 6 tables and 5 figures.) (As Provided).
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Update	2017/4/10