Sequences of Phonemic Approximations in a Thai Conduction Aphasic

Phonology: A Review and Proposals from a Connectionist Perspective

“…Also, because the lesion reduces the reliability of bringing every one of multiple syllables above production threshold, this increases the opportunity for sublexical omissions. Such effects are well documented in patients with reproduction conduction aphasia (Alajouanine & Lhermitte, 1973;Bub, Black, Howell, & Kertesz, 1987;Caplan, Vanier, & Baker, 1986;Caramazza, Miceli, & Villa, 1986;Dubois et al, 1973;Friedman & Kohn, 1990;Gandour, Akamanon, Dechongkit, Khunadorn, & Boonklam, 1994;Kohn, 1989Kohn, , 1991Kohn, , 1995McCarthy & Warrington, 1984;Pate, Saffran, & Martin, 1987;Valdois et al, 1988;Yamadori & Ikumura, 1975). On the other hand, repetition of long words is less likely to result in verbal paraphasias because a single phonemic error is less likely to generate patterns of activity corresponding to other real words, with their associated top-down reinforcement effects.…”

“…Aphasic patients with relatively good access to lexical targets (e.g., Broca's, conduction) demonstrate conduite d'approche (continuous improvement in their effort to zero-in on the target through successive attempts), whereas those (e.g., patients with Wernicke's aphasia) with poor lexical-semantic access are much less likely to exhibit this phenomenon (Butterworth, 1979;Gandour, Akamanon, Dechongkit, Khunadorn, & Boonklam, 1994;Joanette, Keller, & Lecours, 1980;Miller & Ellis, 1987;Valdois, Joanette, & Nespoulous, 1989; but see also Goodglass, Wingfield, Hyde, Gleason, Bowles, & Gallagher, 1997). The phonological improvement noted during conduite d'approche is seen only with real words and not with nonwords.…”

Supra- and Infrasylvian Conduction Aphasia

“…A disturbance of auditory verbal short-time memory (Warrington & Shallice, 1969;Warrington et al, 1971;Caramazza et al, 1981;Tzortzis & Albert, 1974;Albert, 1976) and disordered phonological output (Kohn, 1992(Kohn, , 1984Gandour et al, 1994Gandour et al, , 1991Friedrich et al, 1984;Joanette et al, 1980;Kinsbourne, 1972;Strub & Gardner, 1974;Heilman et al, 1976) are the most suggested linguistic mechanisms.…”

A functional deficit in the sensorimotor interface component as revealed by oral reading in Thai conduction aphasia

“…In the auditory-motor interface system, conduction aphasia is believed to represent a disruption of vocal tract-related motor representations of complex sound sequences in speech (Hickok, Okada, & Serences, 2009) and music (Pa & Hickok, 2008). On an oral picture naming task, we previously reported that tones were better preserved than consonants or vowels in a Thai patient with conduction aphasia (Gandour, Akamanon, Dechongkit, Khunadorn, & Boonklam, 1994). In this paper, we bring evidence to bear on the nature of the sensorimotor interface system by evaluating phonemic errors made by this same patient on an oral reading task.…”

“…The majority of tone errors, on the other hand, were secondary to changes in the syllable structure and/or class of the syllable-initial consonant letter. On an oral picture naming task, an analysis of sequences of phonemic approximations ( conduit d’approche ) revealed that tones were preserved better than consonants or vowels (Gandour et al, 1994). Tones were spared in 86% of PK’s sequences.…”