Using precise word timing information improves decoding accuracy in a multiband-accelerated multimodal reading experiment.

ABSTRACT: The blood-oxygen-level-dependent (BOLD) signal measured in functional magnetic resonance imaging (fMRI) experiments is generally regarded as sluggish and poorly suited for probing neural function at the rapid timescales involved in sentence comprehension. However, recent studies have shown the value of acquiring data with very short repetition times (TRs), not merely in terms of improvements in contrast to noise ratio (CNR) through averaging, but also in terms of additional fine-grained temporal information. Using multiband-accelerated fMRI, we achieved whole-brain scans at 3-mm resolution with a TR of just 500 ms at both 3T and 7T field strengths. By taking advantage of word timing information, we found that word decoding accuracy across two separate sets of scan sessions improved signifi

SUBMITTER: Vu AT 

PROVIDER: S-EPMC5226857 | biostudies-literature | 2016 May-Jun

REPOSITORIES: biostudies-literature