First-Pass versus Second-Pass Parsing Processes in a Wernicke’s and a Broca’s Aphasic: Electrophysiological Evidence for a Double Dissociation  

Oleh:

Friederici, Angela D. ; Hahne, Anja ; Cramon, D. Yves von

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 62 no. 3 (1998), page 311-341.
Fulltext: 62_03_Friederici.pdf (561.18KB)

Isi artikel

The present paper is a first attempt to integrate the classical brain lesion behavioral impairment approach of functional neuroanatomy and the electrophysiological brain mapping approach in the domain of syntactic processing. In a group of normal agematched controls we identified three electrophysiological components previously observed in correlation with language comprehension processes: an early left anterior negativity normally seen in correlation with syntactic first-pass parsing processes (ELAN), a centroparietal negativity seen in correlation with processes of lexical-semantic integration (N400), and a late centroparietal positivity observed in correlation with secondary syntactic processes of reanalysis and repair (P600). The early left anterior negativity was absent in a patient with an extended lesion in the anterior part of the left hemisphere sparing the temporal lobe, although the late centroparietal positivity and the centroparietal N400 were present. In a patient with a left temporal-parietal lesion the early left anterior negativity was found to be present, whereas the N400 component was absent. These findings suggest that firstpass parsing and secondary processes are subserved by distinct brain systems.

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