Abstract
Correlation between behavioral parameters and fMRI responses can provide an advanced understanding of the neuronal processes. A lexical decision task was employed to examine the correlation between the reaction time (RT) and the temporal parameters in event-related BOLD responses. Word frequency was manipulated in the experiment. RTs for high-frequency, low-frequency and pseudowords were measured during fMRI (417 ± 9 ms, 631 ± 22 ms and 658 ± 15 ms, respectively). For high-frequency words, RTs were significantly shorter than that for low-frequency and pseudowords (p < 0.0005). In the left inferior frontal region, the FWHM of the fMRI responses was significantly correlated with RT (p < 0.001), which may correspond to areas with sustained activation during the whole processing.
Original language | English (US) |
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Pages (from-to) | 451-455 |
Number of pages | 5 |
Journal | Magnetic Resonance Imaging |
Volume | 22 |
Issue number | 4 |
DOIs | |
State | Published - May 2004 |
Externally published | Yes |
Keywords
- Brain
- Hemodynamic response
- Lexical decision
- Reaction time
- fMRI
ASJC Scopus subject areas
- Biophysics
- Biomedical Engineering
- Radiology Nuclear Medicine and imaging