TY - GEN ID - cogprints81 UR - http://cogprints.org/81/ A1 - Posner, Michael I. A1 - Pavese, Antonella Y1 - 1998/02// N2 - Reading and listening involve complex psychological processes that recruit many brain areas. The anatomy of processing English words has been studied by a variety of imaging methods. Although there is widespread agreement on the general anatomical areas involved in comprehending words, there are still disputes about the computations that go on in these areas. Examination of the time relations (circuitry) among these anatomical areas can aid in under-standing their computations. In this paper we concentrate on tasks which involve obtaining the meaning of a word in isolation or in relation to a sentence. Our current data support a finding in the literature that frontal semantic areas are active well before posterior areas. We use the subjectís attention to amplify relevant brain areas involved either in semantic classification or in judging the relation of the word to a sentence in order to test the hypothesis that frontal areas are concerned with lexical semantics while posterior areas are more involved in comprehension of propositions that involve several words. KW - language KW - sentence processing KW - word processing KW - event related potentials KW - ERPs KW - Broca's area KW - Wernicke's area KW - time course of activation. TI - Anatomy of word and sentence meaning SP - 899 AV - public EP - 905 ER -