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Cognition-activated low-frequency modulation of light absorption in human brain
1Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia 19104-6089.
Summary
Researchers detected changes in human brain frontal region blood concentration using a portable spectrophotometer. This noninvasive optical device measures low-frequency brain activity linked to cognitive function, offering potential for simplified cognitive tests.
Area of Science:
- Neuroscience
- Biomedical Optics
- Cognitive Science
Background:
- Animal studies suggest brain light absorption changes with visual stimulation.
- Human brain frontal region exhibits red-light absorbance changes linked to cognitive processes.