TMS on area V5 influences visual speech recognition

Datum

23.05.2019

Zeit

17:30 - 18:00

Sprecher

M. Sc. Lisa Jeschke

Zugehörigkeit

TUD, Chair of Cognitive and Clinical Neuroscience

Serie

TUD NIC Kolloquium

Sprache

en

Hauptthema

Psychologie

Host

NIC

Beschreibung

There is strong evidence that sensory thalamus responses are modulated when humans recognise speech and that this task-dependent modulation is behaviourally relevant. We have previously interpreted these findings within a dynamic predictive coding model of cortico-subcortical interactions. In the context of visual speech recognition, one key prediction of the model is that a reduction in the function of relevant visual cortical regions leads to a reduction in the task-dependent modulation of the lateral geniculate nucleus (LGN, visual thalamus) and in the visual speech recognition performance (lip-reading). Our aim is to investigate whether the cortical area V5, that is highly sensitive to visual motion, might be a source of the task-dependent LGN modulation. In a first step towards testing our hypothesis, we want to investigate whether a stimulation of V5 influences the lip-reading performance. Therefore, we plan to establish a TMS-experiment with the factors stimulation (V5 vs. sham) and task (lip-reading vs. face identity). We expect that TMS over V5 will disrupt the subjects’ lip-reading performance, compared to sham, while this difference should be absent for a face-identity task. We plan to localise the point of TMS on an individual participant level with a functional MRI localiser for V5.

Letztmalig verändert: 17.05.2019, 12:30:04