Contagious yawning and the brain Steven M. Platek, Feroze B. Mohamed, Gordon G. Gallup Jr. A summary by Erica Hunter.

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Contagious yawning and the brain Steven M. Platek, Feroze B. Mohamed, Gordon G. Gallup Jr. A summary by Erica Hunter

Background Empathic modeling hypothesis –Primitive expression of cognitive processes involved in self awareness and theory of mind –Seeing someone yawn activates a system that is also involved in consciously modeling other aspects of interpersonal mentality. Innate mirror neuron system –Automatically synchronizing own behaviours with others’ How to test these? - Explore the neural correlates of contagious yawning when compared to laughing!

Hypothesis Viewing someone yawn will result in significant activation in right prefrontal substrates and midline cortical structures

Experimental Design 1.Use fMRI to measure BOLD responses while volunteers watch and respond to videos of people yawning and laughing. 2.Compare BOLD responses 1.Yawn vs laugh; laugh vs yawn 2.Yawn vs baseline; laugh vs baseline Laughing = control (similar face and mouth movements; also contagious)

Results and Discussion When contrasting yawn minus laugh… Unique neural substrates Bilateral posterior cingulate & precuneus –Self-referent processing –Retrieval of autobiographical memories Supports EMPATHIC MODELING HYPOTHESIS!

Weaknesses and Confounds Small sample size Volunteer college students The next step: Toddlers and contagious yawning - Why not?

References Platek, S. M., Mohamed, F. B., Gallup, G. G. Jr. (2005) Contagious yawning and the brain. Cognitive Brain Research, 23: Doi: Anderson, J. R. and Meno, P. (2003) Psychological influences on yawning in children. Behaviour, Brain, and Cognition, 11(2): 2-7. Retrieved from