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Opaque_for_the_reader.pdf (1.960Mb)Meinzer, Marcus; Lahiri, Aditi; Flaisch, Tobias; Hannemann, Ronny; Eulitz, Carsten (2009), Artikel[more][less]
Erschienen in: First publ. in: Neuropsychologia 47 (2009), 8-9, pp. 1964-1971 Zusammenfassung: Within linguistics. words with a complex internal structure are commonly assumed to be decomposed into their constituent morphemes (e.g., un-help-ful). Nevertheless, an ongoing debate concerns the brain structures that subserve this process. Using functional magnetic resonance imaging, the present study varied the internal complexity of derived words while keeping the external surface structure constant as well as controlling relevant parameters that could affect word recognition. This allowed us to tease apart brain activations specifically related to morphological processing from those related to possible confounds of perceptual cues like word length or affix type. Increased task-related activity in left inferior frontal, bilateral temporo-occipital and right parietal areas was specifically related to the processing of derivations with high complex internal structure relative to those with low complex internal structure. Our results show, that morphologically complex words are decomposed and that the brain processes the degree of internal complexity of word derivations. Dateien zu dieser Publikation: 1
Opaque_for_the_reader.pdf (1.960Mb) -
briem08.pdf (427.8Kb)Briem, Daniela; Balliel, Britta; Rockstroh, Brigitte; Butt, Miriam; Schulte im Walde, Sabine; Assadollahi, Ramin (2008), Artikel[more][less]
Erschienen in: First publ. in: Brain research 1249 (2009), pp. 173-180 Zusammenfassung: A subset of German function verbs can be used either in a full, concrete, heavy ( take a computer ) or in a more metaphorical, abstract or light meaning ( take a shower , no actual taking involved). The present magnetencephalographic (MEG) study explored whether this subset of light verbs is represented in distinct cortical processes. A random sequence of German heavy , light , and pseudo verbs was visually presented in three runs to 22 native German speakers, who performed lexical decision task on real versus pseudo verbs. Across runs, verbs were presented (a) in isolation, (b) in minimal context of a personal pronoun, and (c) light verbs only in a disambiguating context sentence. Central posterior activity 95 135 ms after stimulus onset was more pronounced for heavy than for light uses, whether presented in isolation or in minimal context. Minimal context produced a similar heavyNlight differentiation in the left visual word form area at 160 200 ms. Light verbs presented in sentence context allowing only for a heavy reading evoked larger lefttemporal activation around 270 340 ms than the corresponding light reading . Across runs, real verbs provoked more pronounced activation than pseudo verbs in left-occipital regions at 110 150 ms. Thus, heavy versus light readings of verbs already modulate early posterior visual evoked response even when verbs are presented in isolation. This response becomes clearer in the disambiguating contextual condition. This type of study shows for the first time that language processing is sensitive to representational differences between two readings of one and the same verb stem. Dateien zu dieser Publikation: 1
briem08.pdf (427.8Kb) -
Smolka, Eva; Eviatar, Zohar (2006), Artikel[more][less]
Erschienen in: Publ. in: Cognitive Neuropsychology ; 23 (2006), 6. - S. 972-989 Zusammenfassung: Studies on the cerebral mechanisms of reading have mostly used Latin-based writing systems and assume that the left, but not the right, cerebral hemisphere is capable of phonological processing. The present study used Hebrew as the test language to examine the effects of phonological and orthographic information in the two hemispheres. In unvoweled Hebrew script, words are read via consonant information alone. We used two naming tasks with an interference paradigm, where phonemically, orthographically, and figurally incorrect vowel information conflicted with the consonant information of words presented in the left, right, or central visual fields. Interference patterns indicated that the left hemisphere automatically transforms graphemes into phonemes (Experiments 1 and 2), whereas the right hemisphere processes vowel diacritics as visual objects (Experiment 1), although it possesses some phonological categories (Experiment 2). The significance of these findings for models of visual word recognition in the cerebral hemispheres is discussed. Dateien zu dieser Publikation: 0
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