Sisterhood predicts similar neural processing of a film

Autor: Mareike Bacha-Trams, Gökce Ertas Yorulmaz, Enrico Glerean, Elisa Ryyppö, Karoliina Tapani, Eero Virmavirta, Jenni Saaristo, Iiro P. Jääskeläinen, Mikko Sams
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: NeuroImage, Vol 297, Iss , Pp 120712- (2024)
Druh dokumentu: article
ISSN: 1095-9572
DOI: 10.1016/j.neuroimage.2024.120712
Popis: Relationships between humans are essential for how we see the world. Using fMRI, we explored the neural basis of homophily, a sociological concept that describes the tendency to bond with similar others. Our comparison of brain activity between sisters, friends and acquaintances while they watched a movie, indicate that sisters’ brain activity is more similar than that of friends and friends’ activity is more similar than that of acquaintances. The increased similarity in brain activity measured as inter-subject correlation (ISC) was found both in higher-order brain areas including the default-mode network (DMN) and sensory areas. Increased ISC could not be explained by genetic relation between sisters neither by similarities in eye-movements, emotional experiences, and physiological activity. Our findings shed light on the neural basis of homophily by revealing that similarity in brain activity in the DMN and sensory areas is the stronger the closer is the relationship between the people.
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