The role of the arcuate and middle longitudinal fasciculi in speech perception in noise in adulthood.

ABSTRACT: In this article, we used High Angular Resolution Diffusion Imaging (HARDI) with advanced anatomically constrained particle filtering tractography to investigate the role of the arcuate fasciculus (AF) and the middle longitudinal fasciculus (MdLF) in speech perception in noise in younger and older adults. Fourteen young and 15 elderly adults completed a syllable discrimination task in the presence of broadband masking noise. Mediation analyses revealed few effects of age on white matter (WM) in these fascicles but broad effects of WM on speech perception, independently of age, especially in terms of sensitivity and criterion (response bias), after controlling for individual differences in hearing sensitivity and head size. Indirect (mediated) effects of age on speech perception through WM m

SUBMITTER: Tremblay P 

PROVIDER: S-EPMC6865648 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature