Altered intrinsic connectivity of the auditory cortex in congenital amusia

作者：Leveque Yohana^*; Fauvel Baptiste; Groussard Mathilde; Caclin Anne; Albouy Philippe; Platel Herve; Tillmann Barbara

来源：Journal of Neurophysiology, 2016, 116(1): 88-97.

DOI：10.1152/jn.00663.2015

• default mode network
• fMRI
• frontotemporal network
• functional connectivity
• tone deafness

Congenital amusia, a neurodevelopmental disorder of music perception and production, has been associated with abnormal anatomical and functional connectivity in a right frontotemporal pathway. To investigate whether spontaneous connectivity in brain networks involving the auditory cortex is altered in the amusic brain, we ran a seed-based connectivity analysis, contrasting at-rest functional MRI data of amusic and matched control participants. Our results reveal reduced frontotemporal connectivity in amusia during resting state, as well as an overconnectivity between the auditory cortex and the default mode network (DMN). The findings suggest that the auditory cortex is intrinsically more engaged toward internal processes and less available to external stimuli in amusics compared with controls. Beyond amusia, our findings provide new evidence for the link between cognitive deficits in pathology and abnormalities in the connectivity between sensory areas and the DMN at rest.

• 出版日期2016-7