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 ...
Ursula Wolf +2 more
exaly +13 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.
Ursula Wolf +2 more
exaly +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.
Ursula Wolf +2 more
exaly +10 more sources
Hemodynamics and vascular oxygenation measured at the forehead during changes in respiration: A SPA-fNIRS study [PDF]
Respiratory Physiology and NeurobiologySIGNIFICANCE 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 ...
Felix Scholkmann +2 more
exaly +7 more sources
Cerebral, systemic physiological and behavioral responses to colored light exposure during a cognitive task: A SPA-fNIRS study [PDF]
Behavioural Brain ResearchColored 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 ...
Ursula Wolf +2 more
exaly +6 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 +3 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 +3 more
europepmc +2 more sources
Systemic physiology augmented functional near-infrared spectroscopy hyperscanning: a first evaluation investigating entrainment of spontaneous activity of brain and body physiology between subjects. [PDF]
Neurophotonics, 2022 . Significance: Functional near-infrared spectroscopy (fNIRS) enables measuring the brain activity of two subjects while they interact, i.e., the hyperscanning approach.
Guglielmini S +4 more
europepmc +2 more sources
Frontal cerebral oxygenation asymmetry: intersubject variability and dependence on systemic physiology, season, and time of day. [PDF]
Neurophotonics, 2020 . Significance: Our study reveals that frontal cerebral oxygenation asymmetry (FCOA), i.e. a difference in the oxygenation between the right and left prefrontal cortex (PFC), is a real phenomenon in healthy human subjects at rest.
Zohdi H, Scholkmann F, Wolf U.
europepmc +2 more sources
Sentence recall and neurophysiological effects of the "2-Sentence Problem" under time compression in younger and older listeners. [PDF]
Hear ResUnderstanding how auditory cognitive load impacts speech recognition is critical for improving communication strategies across the lifespan. This study investigated the effects of two auditory cognitive load factors – sentence count (one vs two sentences)
Sinfield VC +3 more
europepmc +2 more sources