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Supplemental Data S1 Congruent Embodied Representations

Summary: Supplemental Data S1
Congruent Embodied Representations
for Visually Presented Actions and
Linguistic Phrases Describing Actions
Lisa Aziz-Zadeh, Stephen M. Wilson,
Giacomo Rizzolatti, and Marco Iacoboni
Figure S1. Signal Change in the Left and Right Premotor Cortex during Reading of Metaphorical Phrases, for Voxels Identified by Action Obser-
vation of Each Effector
Signal change in the left (A) and right (B) premotor cortex during reading of metaphorical phrases, for voxels identified by action observation of
each effector. There were no significant interactions. These data may be difficult to interpret due to several methodological issues. First, the
degree of correspondence between language and action observation may be important; whereas most of the literal phrases that were presented
had high congruence with the actions that were presented (e.g., ``grasping the keys'' and observing someone grasping keys), metaphorical
phrases inherently match actual physical actions less closely (e.g., ``grasp the meaning'' does not correspond to an action which could be pre-
sented visually). Second, it is possible that once a metaphor is learned, it no longer activates the same network that it may have initially. That is,
although a metaphor like ``grasping the situation'' when first encountered may have utilized motor representations for its understanding, once it is
overlearned, it no longer relies on these representations and instead utilizes other representations that have to do with the concept of
``understanding.'' This hypothesis could be tested by studying activations to metaphors on a continuum from novel to overlearned, with the
prediction that novel metaphors would more strongly activate sensory-motor representations than overlearned metaphors. Error bars represent
the SEM.
CURBIO 4988s


Source: Aziz-Zadeh, Lisa - Brain and Creativity Institute & Department of Occupational Science, University of Southern California


Collections: Biology and Medicine