Inhibiting responses under the watch of a recently synchronized peer increases self-monitoring: evidence from functional near-infrared spectroscopy

Open Biology, Год журнала: 2024, Номер 14(2)

Опубликована: Фев. 1, 2024

Developing motor synchrony with a peer (through interventions such as the mirror game) can yield collaborative, cognitive and social benefits. However, it is also well established that observation by an audience improve cognition. The combined relative advantages offered synchronization effects are not yet understood. It important to address this gap determine extent which synchronizing activities might interact positive of audience. In preregistered study, we investigate response inhibition may be improved when observed after peer. We compare behavioural cortical (functional near-infrared spectroscopy; fNIRS) measures between synchronized non-synchronized dyads find presence peer-audience introduces speed-accuracy trade-off, consisting slower reaction times accuracy. This co-occurs activation in bilateral inferior frontal middle prefrontal cortices, implicated monitoring maintenance alignment. Our findings have implications for carers support people, who benefit from rehabilitating skills clinical settings.

Язык: Английский

---

Cross-modal functional connectivity supports speech understanding in cochlear implant users

Cerebral Cortex, Год журнала: 2022, Номер 33(7), С. 3350 - 3371

Опубликована: Авг. 20, 2022

Abstract Sensory deprivation can lead to cross-modal cortical changes, whereby sensory brain regions deprived of input may be recruited perform atypical function. Enhanced responses visual stimuli observed in auditory cortex postlingually deaf cochlear implant (CI) users are hypothesized reflect increased activation language regions, but it is unclear if this activity “adaptive” or “mal-adaptive” for speech understanding. To determine correlated with better understanding CI users, we assessed task-related and functional connectivity cortices non-speech (n = 14) normal-hearing listeners 17) used near-infrared spectroscopy measure hemodynamic responses. We visually presented investigate neural processes related linguistic content that show beneficial effects. Specifically, an increase between the left cortices—presumed primary sites processing—was positively users’ abilities understand background noise. Cross-modal adaptive a distributed, multimodal network, enhance

Язык: Английский

---

Reducing false discoveries in resting-state functional connectivity using short channel correction: an fNIRS study

Neurophotonics, Год журнала: 2022, Номер 9(01)

Опубликована: Янв. 18, 2022

Significance: Functional near-infrared spectroscopy (fNIRS) is a neuroimaging tool that can measure resting-state functional connectivity; however, non-neuronal components present in fNIRS signals introduce false discoveries connectivity, which impact interpretation of networks. Aim: We investigated the effect short channel correction on connectivity by removing from long data. hypothesized be reduced, hence improving discriminability networks known, different strengths. Approach: A principal component analysis-based technique was applied to data 10 healthy adult subjects. Connectivity analyzed using magnitude-squared coherence pairs groups homologous and control brain regions, are known differ connectivity. Results: By correction, significant reduction observed for oxy-hemoglobin concentration changes frequency bands associated with overlap Mayer wave frequencies. The results showed reduced spurious correlations measures improved between groups. Conclusions: Resting-state analysis performs better than without its ability distinguish distinct characteristics.

Язык: Английский

---

The application of fNIRS in studies on occupational workload: a systematic review

Frontiers in Public Health, Год журнала: 2025, Номер 13

Опубликована: Апрель 22, 2025

Background Occupational workload can contribute to significant health problems such as chronic stress, fatigue and burnout. To investigate the underlying mechanisms, it is necessary monitor brain activity in real work environments. Functional near-infrared spectroscopy (fNIRS) a portable, non-invasive neuroimaging method that captures neural correlates of occupational under natural conditions. However, despite its increasing application, comprehensive overview fNIRS-based research this field lacking. Therefore, systematic review examines how fNIRS be utilized workload. Methods Following PRISMA 2020 guidelines, we conducted our by searching Web Science, PubMed, Scopus between November 15, 2023 March 20, 2025. We included all studies published English or German at any date, long they examined healthy adult professionals performing tasks with functional (fNIRS). Extracted data study characteristics, details, signal processing methods, main findings, quality, assessed using JBI Critical Appraisal Tool. Results 41 studies. Of these, 23 reported increase oxygenated hemoglobin (HbO) concentration connectivity prefrontal cortex (PFC) higher Only five typical office tasks. Nine analyzed differences cortical activation experts novices, showing increased HbO PFC than novices. Regarding methodology, 26 used standardized optode placements, while only 17 applied systemic extracerebral artifact correction. Small sample sizes absence randomized controlled trials limited reliability reproducibility findings. Conclusion effectively detects provides objective insights into cognitive demands real-world settings. Standardizing placement, harmonizing signal-processing would enhance validity comparability future research. Expanding investigations environments also crucial for understanding daily developing interventions promote employee well-being productivity. Overall, represents promising tool establishing evidence-based workplace promotion strategies across diverse

Язык: Английский

---

Enhanced Joint Heart and Respiratory Rates Extraction from Functional Near-infrared Spectroscopy Signals Using Cumulative Curve Fitting Approximation

Journal of Medical Signals & Sensors, Год журнала: 2025, Номер 15(5)

Опубликована: Май 1, 2025

Abstract Background: Functional near-infrared spectroscopy (fNIRS) is a valuable neuroimaging tool that captures cerebral hemodynamic during various brain tasks. However, fNIRS data usually suffer physiological artifacts. As matter of fact, these artifacts are rich in information. Methods: Leveraging this, our study presents novel algorithm for extracting heart and respiratory rates (RRs) from signals using nonstationary, nonlinear filtering approach called cumulative curve fitting approximation. To enhance the accuracy peak localization, real-time method based on polynomial was implemented, addressing limitations 10 Hz temporal resolution fNIRS. Simultaneous recordings fNIRS, electrocardiogram (ECG), respiration chest band strain gauge sensor were obtained 15 subjects task. Two-thirds subjects’ used training procedure, employing 5-fold cross-validation approach, while remaining completely unseen reserved final testing. Results: The results demonstrated strong correlation ( r > 0.92, Bland–Altman Ratio <6%) between rate variability derived ECG signals. Moreover, low mean absolute error (0.18 s) estimating period emphasizes feasibility proposed RR estimation data. In addition, paired t -tests showed no significant difference estimated fNIRS-based measurements those each subject P 0.05). Conclusion: This highlights as powerful noninvasive extraction RRs alongside findings pave way developing lightweight, cost-effective wearable devices can simultaneously monitor hemodynamic, heart, activity, enhancing comfort portability health monitoring applications.

Язык: Английский

---

Cortical haemodynamic responses predict individual ability to recognise vocal emotions with uninformative pitch cues but do not distinguish different emotions

Human Brain Mapping, Год журнала: 2023, Номер 44(9), С. 3684 - 3705

Опубликована: Май 10, 2023

We investigated the cortical representation of emotional prosody in normal-hearing listeners using functional near-infrared spectroscopy (fNIRS) and behavioural assessments. Consistent with previous reports, relied most heavily on F0 cues when recognizing emotion cues; performance was relatively poor-and highly variable between listeners-when only intensity speech-rate were available. Using fNIRS to image activity speech utterances containing natural reduced prosodic cues, we found right superior temporal gyrus (STG) be sensitive prosody, but no emotion-specific activations, suggesting that while might suited investigating mechanisms supporting processing it is less haemodynamic responses individual vocal emotions. Manipulating render informative, amplitude response STG significantly correlated listeners' abilities recognise emotions uninformative cues. Specifically, more able assign degraded showed lower these signals. This suggests a potential objective measure sensitivity benefit neurodiverse populations or hearing-impaired listeners, many whom rely listening technologies such as hearing aids cochlear implants-neither which restore, often further degrade, essential parsing conveyed speech.

Язык: Английский

---

Connections between spatially distant primary language regions strengthen with age during infancy, as revealed by resting-state fNIRS

Journal of Neural Engineering, Год журнала: 2023, Номер 20(1), С. 016053 - 016053

Опубликована: Фев. 1, 2023

Abstract Objective. Hearing is an important sensory function that plays a key role in how children learn to speak and develop language skills. Although previous neuroimaging studies have established much of brain network maturation happens early childhood, our understanding the developmental trajectory areas still very limited. We hypothesized typical development childhood could be by analyzing changes functional connectivity normal hearing infants at different ages using near-infrared spectroscopy. Approach. Resting-state data were recorded from two bilateral temporal prefrontal regions associated with processing measuring relative oxy-hemoglobin (HbO) deoxy-hemoglobin (HbR) concentrations. Connectivity was calculated magnitude-squared coherence channel pairs located (a) inter-hemispheric homologous (b) intra-hemispheric assess between across hemispheres interest same hemisphere, respectively. Main results. A linear regression model fitted age vs test group revealed significant coefficient determination for both HbO ( R 2 = 0.216, p 0.0169) HbR 0.206, 0.0198). also found 0.237, 0.0117) but not 0.111, 0.0956). Significance. The findings suggest primary significantly strengthen first year life. Mapping out as measured potentially allow us better understand altered its effects on delays impairments.

Язык: Английский

---

Validation of fNIRS measurement of executive demand during walking with and without dual-task in younger and older adults and people with Parkinson’s disease

NeuroImage Clinical, Год журнала: 2024, Номер 43, С. 103637 - 103637

Опубликована: Янв. 1, 2024

Walking with a concurrent cognitive task (dual-task walking) can pose challenge to some populations due aging or neurodegenerative disease. These tasks require resources involving the prefrontal cortex and be studied using functional near-infrared spectroscopy (fNIRS). An important step in understanding fNIRS measures during such walking is validating that reflect demands of not confounding sources movement artifacts.

Язык: Английский

---

Contralateral dominance to speech in the adult auditory cortex immediately after cochlear implantation

iScience, Год журнала: 2022, Номер 25(8), С. 104737 - 104737

Опубликована: Июль 9, 2022

Sensory deprivation causes structural and functional changes in the human brain. Cochlear implantation delivers immediate reintroduction of auditory sensory information. Previous reports have indicated that over a year is required for brain to reestablish canonical cortical processing patterns after stimulation. We utilized near-infrared spectroscopy (fNIRS) investigate activity natural speech stimuli directly cochlear implantation. presented 12 implant recipients, who each had minimum months deprivation, with unilateral auditory- visual-speech stimuli. Regardless side implantation, responses were elicited primarily on contralateral stimulation as early 1 h device activation. These data indicate pathway connections are sustained during periods adults, typical lateralization observed immediately following input.

Язык: Английский

---

Engaging learners with games–Insights from functional near-infrared spectroscopy

PLoS ONE, Год журнала: 2023, Номер 18(6), С. e0286450 - e0286450

Опубликована: Июнь 6, 2023

The use of game elements in learning tasks is thought to facilitate emotional and behavioral responses as well learner engagement. So far, however, little known about the underlying neural mechanisms game-based learning. In current study, we added a number line estimation task assessing fraction understanding compared brain activation patterns non-game-based version. Forty-one participants performed both versions counterbalanced order while frontal were assessed using near-infrared spectroscopy (within-subject, cross-sectional study design). Additionally, heart rate, subjective user experience, performance recorded. Task performance, mood, flow rate did not differ between versions. However, task-version was rated more attractive, stimulating novel completing version associated with stronger areas generally involved reward processing attentional processes. These results provide new neurofunctional evidence substantiating that seem through cognitive

Язык: Английский

---