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« Jonathan Bobaljik in Syntax Reading Group | Main | WHISC Welcomes New Contributors»
Liina Pylkkänen Colloquium
Liina Pylkkänen
New York University
The Visual System and Morphology
(Joint work with Eytan Zweig, Suzanne Dikker and Hugh Rabagliati)
In this talk I discuss a set of magnetoencephalography (MEG) experiments investigating how morphemes are detected from sensory input in the visual modality, the most commonly used modality in studies of syntactic and semantic processing. The first two experiments aimed to identify a potential neural index of pre-lexical decomposition of words into morphemes. Our results indicate that the earliest MEG activity affected by morphological complexity is the right hemisphere generator of the M170 component, associated in previous studies with high-level vision, especially face processing. This morphological complexity effect occurred in the same time-window as the early left anterior negativity (ELAN), an ERP component associated with syntactic category violations and argued to reflect presemantic identification of word category (Friederici, 2002). In the second half of the talk I describe a study that used MEG to elucidate the neural generators of the ELAN. Surprisingly, our results show that violations of word category expectations elicit larger amplitudes already at 100ms in the visual cortex. If already the sensory cortices can check predictions based on syntactic structure, as our findings suggest for the visual modality, this may shed new light on the remarkable rapidity of language processing.