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The Role of Systemic Physiology in Individual Hemodynamic Responses Measured on the Head Due to Long-Term Stimulation Involving Colored Light Exposure and a Cognitive Task: An SPA-fNIRS Study [PDF]

Brain Sciences, 2022
In our previous investigations using systemic physiology augmented functional near-infrared spectroscopy (SPA-fNIRS) neuroimaging, we found larger variability between subjects in changes of cerebral hemodynamics and oxygenation induced by an intricate ...
Felix Scholkmann, Hamoon Zohdi, Ursula Wolf +2 more
doaj +11 more sources

Color-dependent changes in humans during a verbal fluency task under colored light exposure assessed by SPA-fNIRS [PDF]

Scientific Reports, 2021
Light evokes robust visual and nonvisual physiological and psychological effects in humans, such as emotional and behavioral responses, as well as changes in cognitive brain activity and performance.
Hamoon Zohdi +4 more
doaj +15 more sources

Individual Differences in Hemodynamic Responses Measured on the Head Due to a Long-Term Stimulation Involving Colored Light Exposure and a Cognitive Task: A SPA-fNIRS Study [PDF]

Brain Sciences, 2021
When brain activity is measured by neuroimaging, the canonical hemodynamic response (increase in oxygenated hemoglobin ([O2Hb]) and decrease in deoxygenated hemoglobin ([HHb]) is not always seen in every subject.
Hamoon Zohdi, Felix Scholkmann, Ursula Wolf +2 more
doaj +13 more sources

Intersubject Variability in Cerebrovascular Hemodynamics and Systemic Physiology during a Verbal Fluency Task under Colored Light Exposure: Clustering of Subjects by Unsupervised Machine Learning [PDF]

Brain Sciences, 2022
There is large intersubject variability in cerebrovascular hemodynamic and systemic physiological responses induced by a verbal fluency task (VFT) under colored light exposure (CLE).
Hamoon Zohdi +3 more
doaj +7 more sources

Cerebral, systemic physiological and behavioral responses to colored light exposure during a cognitive task: A SPA-fNIRS study [PDF]

Behavioural Brain Research
Colored light has important implications for human health and well-being, as well as for the aesthetics and function of various environments. In addition to its effects on visual function, colored light has significant effects on cognitive performance, behavior and systemic physiology. The aim of the current study was to comprehensively investigate how
Zohdi, Hamoon +3 more
core +8 more sources

Hemodynamics and vascular oxygenation measured at the forehead during changes in respiration: A SPA-fNIRS study [PDF]

Respiratory Physiology & Neurobiology
Significance: Cerebral blood flow is influenced by respiration, primarily through changes in the CO₂ concentration of arterial blood. Aim: The objective of this study was to investigate the effect of changes in arterial CO₂ concentration induced by respiratory changes on oxygenation and hemodynamics in the cerebral and extracerebral tissue layers of ...
Guglielmini, Sabino +3 more
core +7 more sources

Systemic physiology augmented functional near-infrared spectroscopy: a powerful approach to study the embodied human brain. [PDF]

Neurophotonics, 2022
In this Outlook paper, we explain why an accurate physiological interpretation of functional near-infrared spectroscopy (fNIRS) neuroimaging signals is facilitated when systemic physiological activity (e.g., cardiorespiratory and autonomic activity) is ...
Scholkmann F, Tachtsidis I, Wolf M, Wolf U. +3 more
europepmc +5 more sources

Applications of Functional Near-Infrared Spectroscopy (fNIRS) Neuroimaging in Exercise–Cognition Science: A Systematic, Methodology-Focused Review [PDF]