Aim of the present study was to assess the relationships between
the gesture and language meaning systems with a priming
paradigm at both the behavioral and the neurophysiological
levels. Fifteen participants watched forty video-clips of different
types of iconic gestures followed by words (nouns or verbs),
which could be related or unrelated in meaning. Behavioral
results showed an interference effect between the meaning of
iconic gestures and that of unrelated words. ERPs analyses
showed a greater P200 component for nouns than for verbs,
which was modulated by the relation with the preceding gesture,
and a clear N400 with greater negative values for verbs than for
nouns. Although there was evidence for a deep integration
between word and gesture in the P200 time window; the lack of
interaction between the meaning relation and the grammatical
class in the N400 time window suggests that the meaning
systems of word and gesture diffe
