Dynamics of phonological–phonetic encoding in word production: Evidence from diverging ERPs between stroke patients and controls  

Oleh:

Laganaro, Marina ; Python, Grégoire ; Toepel, Ulrike

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 126 no. 2 (2013), page 123-132.
Topik: ERP; Speech production; Picture naming; Phonological–phonetic; Aphasia
Fulltext: 126_02_Laganaro.pdf (1.93MB)

Isi artikel

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 400 ms after stimulus onset in the picture naming task and at 320–350 ms in word reading and sustained until 100 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 400 ms in picture naming and around 330 ms in word reading.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali