Neurophysiological distinction of verb categories

Neurophysiological brain responses to subcategories of action verbs were recorded using high resolution EEG. Starting 240 ms after word onset, topographies of event-related potentials distinguished between verbs referring to different action types. Current source density estimates revealed that verbs referring to actions executed with the legs (to kick) produced an activity focus close to the vertex, above motor areas involved in the programming of leg movements, whereas facerelated verbs (to speak) produced a focus at left-lateral recordings, above perisylvian areas and the cortical representation of the face and articulators. This is evidence that brain mechanisms involved in word processing can differ even between fine-grained lexico-semantic subcategories and already within the first quarter of a second after word onset. We offer an explanation of the data in neurobiological terms.

[1]  S. Geisser,et al.  On methods in the analysis of profile data , 1959 .

[2]  R. C. Oldfield.  The assessment and analysis of handedness: the Edinburgh inventory. , 1971, Neuropsychologia.

[3]  E. Warrington,et al.  CATEGORY SPECIFIC ACCESS DYSPHASIA , 1983 .

[4]  T. Shallice,et al.  Category specific semantic impairments , 1984 .

[5]  C. C. Wood,et al.  Scalp distributions of event-related potentials: an ambiguity associated with analysis of variance models. , 1985, Electroencephalography and clinical neurophysiology.

[6]  E. Warrington,et al.  Categories of knowledge. Further fractionations and an attempted integration. , 1987, Brain : a journal of neurology.

[7]  E Donchin,et al.  P300 and the word frequency effect. , 1988, Electroencephalography and clinical neurophysiology.

[8]  M. Rugg.  Event-related brain potentials dissociate repetition effects of high-and low-frequency words , 1990, Memory & cognition.

[9]  F. Perrin,et al.  Comments on article by Biggins et al. , 1992, Electroencephalography and clinical neurophysiology.

[10]  N. Birbaumer,et al.  Electrocortical distinction of vocabulary types. , 1995, Electroencephalography and clinical neurophysiology.

[11]  Michael Bersick,et al.  Brain potentials elicited by words: word length and frequency predict the latency of an early negativity , 1997, Biological Psychology.

[12]  H. Jasper,et al.  The ten-twenty electrode system of the International Federation. The International Federation of Clinical Neurophysiology. , 1999, Electroencephalography and clinical neurophysiology. Supplement.

[13]  F. Pulvermüller,et al.  Words in the brain's language , 1999, Behavioral and Brain Sciences.