The role of left inferior frontal Gyrus in the integration of point-
ing gestures and speech
Peeters, D., Snijders, T. M., Hagoort, P., & Ozyurek, A.
The role of left inferior frontal Gyrus in the integration of point- ing gestures and speech. In G. Ferré, & M. Tutton (Eds.
), Proceedings of the4th GESPIN - Gesture & Speech in Interaction Conference
. Nantes: Université de Nantes.
Comprehension of pointing gestures is fundamental to human communication. However, the neural mechanisms
that subserve the integration of pointing gestures and speech in visual contexts in comprehension
are unclear. Here we present the results of an fMRI study in which participants watched images of an
actor pointing at an object while they listened to her referential speech. The use of a mismatch paradigm
revealed that the semantic unication of pointing gesture and speech in a triadic context recruits left
inferior frontal gyrus. Complementing previous ndings, this suggests that left inferior frontal gyrus
semantically integrates information across modalities and semiotic domains.