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Title: White Matter Microstructure Reflects Individual Differences in Music Reward Sensitivity
Author: Martínez-Molina, Noelia
Mas-Herrero, Ernest
Rodríguez Fornells, Antoni
Zatorre, Robert J.
Marco Pallarés, Josep
Keywords: Imatges per ressonància magnètica
Sensibilitat (Psicologia)
Magnetic resonance imaging
Sensitivity (Personality trait)
Issue Date: 19-Jun-2019
Publisher: The Society for Neuroscience
Abstract: People show considerable variability in the degree of pleasure they experience from music. These individual differences in music reward sensitivity are driven by variability in functional connectivity between the nucleus accumbens (NAcc), a key structure of the reward system, and the right superior temporal gyrus (STG). However, it is unknown whether a neuroanatomical basis exists for this variability. We used diffusion tensor imaging and probabilistic tractography to study the relationship between music reward sensitivity and white matter microstructure connecting these two regions via the orbitofrontal cortex (OFC) in 38 healthy human participants (24 females and 14 males). We found that right axial diffusivity (AD) in the STG-OFC connectivity inversely correlated with music reward sensitivity. Additionally, right mean diffusivity and left AD in the NAcc-OFC tract also showed an inverse correlation. Further, AD in this tract also correlated with previously acquired BOLD activity during music listening, but notfor a control monetary reward task in the NAcc. Finally, we used mediation analysis to show that AD in the NAcc-OFC tract explains the influence of NAcc activation during a music task on music reward sensitivity. Overall, our results provide further support for the idea that the exchange of information among perceptual, integrative, and reward systems is important for musical pleasure, and that individual differences in the structure of the relevant anatomical connectivity influences the degree to which people are able to derive such pleasure.
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It is part of: Journal of Neuroscience, 2019, vol. 39, num. 25, p. 5018-5027
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ISSN: 0270-6474
Appears in Collections:Articles publicats en revistes (Cognició, Desenvolupament i Psicologia de l'Educació)

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