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

An T. Vu, Jeffrey S. Phillips, Kendrick Kay, Matthew E. Phillips, Matthew R. Johnson, Svetlana V. Shinkareva, Shannon Tubridy, Rachel Millin, Murray Grossman, Todd Gureckis, Rajan Bhattacharyya, Essa Yacoub

Research output: Contribution to journalArticle

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 significantly, with better overall performance at 7T than at 3T. The effect of TR was also investigated; we found that substantial word timing information can be extracted using fast TRs, with diminishing benefits beyond TRs of 1000 ms.

Original languageEnglish (US)
Pages (from-to)265-275
Number of pages11
JournalCognitive Neuropsychology
Volume33
Issue number3-4
DOIs
StatePublished - May 18 2016

Keywords

  • 7T
  • decoding
  • functional magnetic resonance imaging
  • multiband
  • timing
  • words

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Experimental and Cognitive Psychology
  • Developmental and Educational Psychology
  • Arts and Humanities (miscellaneous)
  • Cognitive Neuroscience

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  • Cite this

    Vu, A. T., Phillips, J. S., Kay, K., Phillips, M. E., Johnson, M. R., Shinkareva, S. V., Tubridy, S., Millin, R., Grossman, M., Gureckis, T., Bhattacharyya, R., & Yacoub, E. (2016). Using precise word timing information improves decoding accuracy in a multiband-accelerated multimodal reading experiment. Cognitive Neuropsychology, 33(3-4), 265-275. https://doi.org/10.1080/02643294.2016.1195343