Very early processing of emotional words revealed in temporoparietal junctions of both hemispheres by EEG and TMS

Name: 7T MRI Seminar: Probing Brain Metabolism by Multi-nuclear Magnetic Resonance Spectroscopy: Technical Advances and Applications at 7T
Start: 2024-04-24
End: 2024-04-24
Location: Campus Biotech, room H8-01-D

AUTHORS: Rochas V, Rihs TA, Rosenberg N, Landis T, Michel CM

Experimental Brain Research, 232(4): 1267-81, April 2014

ABSTRACT

We investigate the contribution of both hemispheres in a lateralised lexical decision paradigm with emotional and neutral words in healthy volunteers. In a first experiment, high-density EEG analysis using source imaging methods revealed early specific participation of the temporoparietal junctions (TPJ) in both hemispheres for the detection of words. Then, in an event-related transcranial magnetic stimulation experiment with the same task, the disruption of left or right TPJ compared with a control stimulation over the vertex showed a slowing that is more pronounced when words are emotional and presented in the left visual field (LVF). This indicates that interference with both left and right TPJ results in impaired processing of words that were presented to the LVF. In addition, these results point to a specific cooperative contribution of the right hemisphere in the processing of words with emotional content compared with neutral words at very early stages. Results from the two experiments can be integrated in a brain-based spatiotemporal model of the early detection of written words.

Download PDF