Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10456417 | Brain and Language | 2013 | 10 Pages |
Abstract
While the dynamics of lexical-semantic and lexical-phonological encoding in word production have been investigated in several event-related potential (ERP) studies, the estimated time course of phonological-phonetic encoding is the result of rather indirect evidence. We investigated the dynamics of phonological-phonetic encoding combining ERP analyses covering the entire encoding process in picture naming and word reading tasks by comparing ERP modulations in eight brain-damaged speakers presenting impaired phonological-phonetic encoding relative to 16 healthy controls. ERPs diverged between groups in terms of local waveform amplitude and global topography at â¼400Â ms after stimulus onset in the picture naming task and at â¼320-350Â ms in word reading and sustained until 100Â ms before articulation onset. These divergences appeared in later time windows than those found in patients with underlying lexical-semantic and lexical-phonological impairment in previous studies, providing evidence that phonological-phonetic encoding is engaged around 400Â ms in picture naming and around 330Â ms in word reading.
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Authors
Marina Laganaro, Grégoire Python, Ulrike Toepel,