Search Abstracts | Symposia | Slide Sessions | Poster Sessions
Modulating Video Action Naming in Healthy Adults via Intermittent Theta Burst Stimulation
Poster Session E, Sunday, September 14, 11:00 am - 12:30 pm, Field House
Manon Spigarelli1,2, Hugo Massé-Alarie1,2, Pascale Tremblay2,3, Maximiliano A. Wilson1,2; 1Centre interdisciplinaire de recherche en réadaptation et intégration sociale – CIRRIS, Québec (Québec), Canada, 2École des sciences de la réadaptation, Faculté de médecine, Université Laval, Québec (Québec), Canada, 3Centre de Recherche CERVO—Brain Research Centre, Québec (Québec), Canada
Background. Most evidence about the neural basis of action naming comes from picture-based tasks. However, recent findings suggest that dynamic stimuli, such as action videos, better capture the complexity of real-life actions and may recruit different or additional brain networks. Previous work highlights the involvement of the left inferior frontal gyrus (IFG) and middle frontal gyrus (MFG) in action naming from pictures, but their role in video action naming remains underexplored. Methods. We applied intermittent theta-burst stimulation (iTBS) to modulate neural activity in the left IFG, left MFG, and a control site—the left superior parietal lobule (SPL). Thirty-six healthy young adults were randomly assigned to receive either active iTBS (n = 18) or placebo stimulation (n = 18). Participants completed video action naming tasks before and after active or placebo iTBS. We analyzed changes in response latencies and naming accuracy. Results. Participants who received active iTBS showed shorter response latencies post-iTBS compared to the placebo group, regardless of the stimulation site. Both groups exhibited improved accuracy post-iTBS, with greater improvement in action naming accuracy in the iTBS group, particularly after left IFG stimulation compared to left MFG. Conclusion. These findings offer novel insights into the cortical substrates of video action naming, confirming the relevance of frontal regions such as the IFG and MFG. To our knowledge, this is among the first studies to examine the effects of iTBS on video action naming in healthy individuals.
Topic Areas: Language Production,