Influence of long-term transcranial infrared light stimulation on the hemodynamic response of the prefrontal cortex during cognitive activities

Chien-Jung Chiu; Yu-Wun Wu; Li-Da Huang; Francisco Gonzalez-Lima; Andy Ying-Chi Liao; Chi-Hsiang Chuang; Kung-Bin Sung

doi:10.1117/12.2650219

17 March 2023 Influence of long-term transcranial infrared light stimulation on the hemodynamic response of the prefrontal cortex during cognitive activities

Chien-Jung Chiu, Yu-Wun Wu, Li-Da Huang, Francisco Gonzalez-Lima, Andy Ying-Chi Liao, Chi-Hsiang Chuang, Kung-Bin Sung

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Proceedings Volume PC12362, Mechanisms of Photobiomodulation Therapy XVII; PC123620F (2023) https://doi.org/10.1117/12.2650219
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Transcranial infrared light stimulation (TILS) has been shown to improve the performance of cognitive tests in adults with subjective memory complaints. Here we study whether long-term TILS benefits the cognitive functions of the elders. Through cognitive tests including card sorting test and delayed match-to-sample test, and functional near-infrared spectroscopy, we compared the cognitive tests performance and hemodynamics at the prefrontal cortex of healthy elders before and after two-to-four weeks of daily 10-mins TILS sessions. Results showed decreased hemodynamic responses after TILS, and greater cognitive enhancements in subjects receiving longer TILS. This may be explained by elevated efficiency of oxygen metabolism after TILS.

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Chien-Jung Chiu, Yu-Wun Wu, Li-Da Huang, Francisco Gonzalez-Lima, Andy Ying-Chi Liao, Chi-Hsiang Chuang, and Kung-Bin Sung "Influence of long-term transcranial infrared light stimulation on the hemodynamic response of the prefrontal cortex during cognitive activities", Proc. SPIE PC12362, Mechanisms of Photobiomodulation Therapy XVII, PC123620F (17 March 2023); https://doi.org/10.1117/12.2650219

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KEYWORDS

Hemodynamics

Infrared radiation

Long wavelength infrared

Prefrontal cortex

Light emitting diodes

Mode conditioning cables

Near infrared spectroscopy

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