Cortical cognitive processing during reading captured using functional-near infrared spectroscopy

Area of Science:

• Cognitive Neuroscience
• Neuroimaging
• Linguistics

Background:

• Functional magnetic resonance imaging (fMRI) has illuminated neural mechanisms of cognitive processes like reading.
• High-level linguistic processing during reading comprehension is a key area of study.

Purpose of the Study:

• To investigate sentence reading comprehension using functional near-infrared spectroscopy (fNIRS) outside of an MRI scanner.
• To replicate and extend prior fMRI findings on cortical recruitment during reading comprehension in a larger sample.

Main Methods:

• Utilized functional near-infrared spectroscopy (fNIRS) on 82 participants during a sentence reading task.
• Employed a control condition using a list of non-words to isolate reading comprehension processes.
• Analyzed task-related hemodynamic responses in prefrontal and temporal cortical regions.

Main Results:

• Observed significantly increased hemodynamic responses in prefrontal and temporal cortical regions during sentence reading compared to the control condition.
• Replicated previous fMRI findings demonstrating cortical recruitment for high-level linguistic processing.
• Demonstrated the feasibility of using fNIRS for studying reading comprehension in a non-scanner environment.

Conclusions:

• fNIRS effectively captures neural activity associated with reading comprehension, particularly in prefrontal and temporal areas.
• Findings support the development of adaptive systems to aid novice readers and language learners.
• This study bridges laboratory-based cognitive neuroscience with real-world applications.