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Updated: Mar 16, 2026
Exploring Cognitive Functions in Babies, Children & Adults with Near Infrared Spectroscopy
Published on: July 28, 2009
Methodology for high-yield acquisition of functional near-infrared spectroscopy data from alert, upright infants
James R Goodwin1, Ashley E Cannaday2, Holly G Palmeri3
1University of Rochester, Institute of Optics, Rochester, New York 14627, United States; Queensland University of Technology, School of Chemistry, Physics and Mechanical Engineering, Brisbane, Queensland 4001, Australia.
Insights
Researchers optimized functional near-infrared spectroscopy (fNIRS) for individual infant studies. This method successfully acquired usable hemodynamic data from 83% of infants, enabling new clinical applications.
Area of Science:
- Neuroscience
- Developmental Psychology
- Biomedical Engineering
Background:
- Functional near-infrared spectroscopy (fNIRS) research typically uses group-averaged data, limiting individual infant insights.
- Studying infants presents challenges due to their inability to remain still, complicating data acquisition.
- Individual infant data is crucial for cognitive science and clinical applications.
Purpose of the Study:
- To optimize functional near-infrared spectroscopy (fNIRS) methods for acquiring high-quality data from individual infants.
- To address challenges associated with studying upright infants, particularly motion artifacts and headpiece comfort.
- To establish a reliable protocol for obtaining infant hemodynamic responses using fNIRS.
Main Methods:
- Reconfigured the fNIRS headpiece to reduce inertia, enhance comfort, and improve head conformity while maintaining fiber density.
- Modified a visual stimulation protocol to maintain infant attention and minimize motion artifacts.
- Implemented rigorous verification of optical contact and revised data rejection criteria.
Main Results:
- Achieved usable hemodynamic data from 83% of 6- to 9-month-old infants.
- Demonstrated a statistically significant fNIRS response in two-thirds of the infants studied.
- Successfully acquired individual infant time courses, overcoming previous limitations.
Conclusions:
- The optimized fNIRS protocol significantly improves data acquisition quality in individual infants.
- This advancement opens new avenues for cognitive and clinical research using infant neuroimaging.
- The findings support the feasibility of using fNIRS for individualized infant brain monitoring.
Abstract:
Functional near-infrared spectroscopy (fNIRS) research to date has tended to publish group-averaged rather than individual infant data due to normative basic research goals. Acquisition of individual infant time courses holds interest, however, both for cognitive science and particularly for clinical applications. Infants are more difficult to study than adults as they cannot be instructed to remain still. In addressing this, upright infants pose several associated complications for the researcher. We identified and optimized the factors that affect the quality of fNIRS data from individual 6- to 9-month-old infants exposed to a visual stimulation paradigm. The fNIRS headpiece was reconfigured to reduce inertia, increase comfort, and improve conformity to the head, while preserving fiber density to avoid missing the visual cortex activation. The visual-stimulation protocol was modified to keep the attention of infants throughout the measurement, thus helping to reduce motion artifacts. Adequate optical contact was verified by checking power levels before each measurement. By revising our experimental process and our data rejection criteria to prioritize good optical contact, we report for the first time usable hemodynamic data from 83% of infants and that two-thirds of infants produced a statistically significant fNIRS response.
