A5052041167- Optical Imaging and Spectroscopy Techniques
- Non-Invasive Vital Sign Monitoring
- Heart Rate Variability and Autonomic Control
- Functional Brain Connectivity Studies
- EEG and Brain-Computer Interfaces
- Blood Pressure and Hypertension Studies
- Hemodynamic Monitoring and Therapy
- Mental Health Research Topics
- Dementia and Cognitive Impairment Research
- Neuroscience and Neural Engineering
- Balance, Gait, and Falls Prevention
- Spectroscopy Techniques in Biomedical and Chemical Research
- Photoreceptor and optogenetics research
- Medical and Biological Ozone Research
- Electroconvulsive Therapy Studies
- Advanced MRI Techniques and Applications
- Surgical Simulation and Training
- Bipolar Disorder and Treatment
- Health and Medical Research Impacts
- Treatment of Major Depression
- Laser Applications in Dentistry and Medicine
- Anesthesia and Sedative Agents
- Technology Use by Older Adults
- Intensive Care Unit Cognitive Disorders
- Quantum Computing Algorithms and Architecture
Samsung Medical Center
2023
Korea Advanced Institute of Science and Technology
2012-2016
Sogang University
1999
This study investigated the effectiveness of using a high-density multi-distance source-detector (SD) separations in near-infrared spectroscopy (NIRS), for enhancing performance functional NIRS (fNIRS)-based brain-computer interface (BCI). The system that was used experiment capable measuring signals from four SD separations: 15, 21.2, 30, and 33.5 mm, this allowed measurement hemodynamic response alterations at various depths. Fifteen participants were asked to perform mental arithmetic...
A custom transceiver IC is designed to implement a portable brain imaging system based on functional near-infrared spectroscopy (fNIRS). The fNIRS generates multichannel time-divided spread-spectrum codes (TDSSCs) and drives light-emitting devices in the transmitter (Tx) chain, performs optimum filtering, quantization, serialization receiver (Rx) chain. dual slope ADC subsequent an operational transconductance amplifier-C-based matched filter shares capacitor save area while achieving...
The present pilot study was aimed at conducting a comparative analysis of the level activation in prefrontal cortex among normal elderly group and amnestic nonamnestic mild cognitive impairment (MCI) groups investigating presence neural compensatory mechanisms according to types MCI different tasks. We performed functional near-infrared spectroscopy (fNIRS) along with tasks, including two-back test, Korean color word Stroop semantic verbal fluency task (SVFT), investigate hemodynamic...
Abstract There remains a scarcity of studies to evaluate the treatment effect electroconvulsive therapy (ECT). Functional near-infrared spectroscopy (fNIRS) offers cost-effective method measure cerebral hemodynamics. This study used fNIRS ECT in patients suffering from schizophrenia or bipolar disorder (manic phase). Thirty with mania and 31 were recruited. Each participant received 6 sessions ECT. utilized Positive Negative Syndrome Scale, Young Mania Rating fNIRS-verbal fluency test...
Reduced oxygenation changes in the prefrontal cortex during cognitive tasks have been reported major depressive disorder (MDD). However, asymmetry and its relation to suicide ideations less frequently examined patients with MDD. This study investigated moderating effect on relationship between depression severity suicidal ideation MDD tasks. Forty-two 64 healthy controls (HCs) were assessed for oxygenated deoxygenated hemoglobin (Hb) using functional near-infrared spectroscopy (fNIRS) verbal...
Deviations in activation patterns and functional connectivity have been observed patients with major depressive disorder (MDD) prefrontal hemodynamics of compared healthy individuals. The graph-theoretical approach provides useful network metrics for evaluating connectivity. evaluation during a cognitive task can be used to explain the neurocognitive mechanism underlying impairments caused by depression. Overall, 31 MDD 43 individuals completed verbal fluency (VFT) while wearing head-mounted...
This study aimed to evaluate portable functional near-infrared spectroscopy (fNIRS) device as an adjunct diagnostic tool in Vietnam assess hemodynamics when people with schizophrenia and healthy controls performed cognitive tasks.One hundred fifty-seven participants were divided into (n = 110) group 47), which recruited by match of age, gender. Hemodynamic responses the frontal cortex monitored a 48-channel during Stroop Color-Word Test (SCWT) Verbal Fluency (VFT). General linear model...
Virtual reality (VR) neuropsychological tests have emerged as a method to explore drug effects in real-life contexts attention deficit hyperactivity disorder (ADHD) children. Functional near-infrared spectroscopy (fNIRS) is useful tool measure brain activity during VR tasks ADHD children with motor restlessness. The present study aimed the acute of methylphenidate (MPH) on behavioral performance and VR-based working memory task simulating classroom settings In total, 23 performed n-back...
Academic achievement is a critical measure of intellectual ability, prompting extensive research into cognitive tasks as potential predictors. Neuroimaging technologies, such functional near-infrared spectroscopy (fNIRS), offer insights brain hemodynamics, allowing understanding the link between performance and academic achievement. Herein, we explored association by analyzing prefrontal fNIRS signals. A novel quantum annealer (QA) feature selection algorithm was applied to data identify...
The implementation of a multi-class brain-computer interface (BCI) is an efficient way to increase the information transfer rate (ITR) generally expressed in unit bits/trial. improvement ITR specific importance for near-infrared spectroscopy (NIRS)-BCI, because brain hemodynamic responses recorded by NIRS are much slower than electrophysiological brain. In this paper, implement ternary NIRS-BCI with increased ITR, we used prefrontal cortex (PFC) changes induced breath-holding (i.e.,...
This study was performed to investigate the usefulness of functional near-infrared spectroscopy (fNIRS) by conducting a comparative analysis hemodynamic activation detected fNIRS and positron emission tomography (PET) magnetic resonance imaging (MRI) in patients with mild cognitive impairment (MCI) Alzheimer’s disease (AD). Participants were divided into four groups: subjective memory (SMI), amnestic MCI (aMCI), non-amnestic (naMCI), AD groups. We recorded response during semantic verbal...
An hardware-efficient method for the extraction of hemodynamic responses in near-infrared spectroscopy systems is proposed to increase spatial and temporal resolution. The performance improvement attributed high signal-to-noise ratio receivers, a modulation scheme, multi-input-multi-output based data algorithm. system shows more than twofold figure merit compared conventional designs. Experimental results support validity system.
The prefrontal cortex (PFC) is involved in cognitive control of motor activities and timing future intensions. This study investigated the balance recovery response to unpredictable gait perturbations role PFC subregions learning by repetition. Bilateral dorsolateral (DLPFC), ventrolateral (VLPFC), frontopolar (FPFC) orbitofrontal (OFC) hemodynamic changes induced slips were analyzed as a function successive trials ten healthy young adults. Slips acceleration one belt participant walked on...
Background: There is little understanding on how brief relaxation practice and viewing greenery images would affect brain responses during cognitive tasks. In the present study, we examined variation in activation of prefrontal cortex arithmetic tasks before after images, practice, control task using functional near-infrared spectroscopy (fNIRS). Method: This randomized controlled study patterns (PFC) three groups research participants who were exposed to (n = 10), 11). The pattern PFC was...
Recent advancements in functional near-infrared spectroscopy technology have offered a portable, wireless, wearable solution to measure the activity of prefrontal cortex (PFC) human neuroscience field. This study is first validate different contributions made by PFC's eight subregions healthy young adults reactive recovery responses following treadmill-induced unpredictable slip perturbations and vibrotactile cueing (i.e., precues).Our fall-inducing platform equipped with split-belt...
Attempts to use virtual reality (VR) as a treatment for various psychiatric disorders have been made recently, and many researchers identified the effects of VR in disorders. Studies reported that therapy is effective social anxiety disorder (SAD). However, there no prior study on neural correlates patients with SAD.The aim this find by evaluating effectiveness SAD using portable functional near-infrared spectroscopy (fNIRS).Patients (n=28) were provided 6 sessions was developed exposure...
Transcranial photobiomodulation (tPBM) has been widely studied for its potential to enhance cognitive functions of the elderly. However, efficacy varies, with some individuals exhibiting no significant response treatment. Considering these inconsistencies, we introduce a machine learning approach aimed at distinguishing between that respond and do not tPBM treatment based on functional near-infrared spectroscopy (fNIRS) acquired before We measured nine scores recorded fNIRS data from 62...
Few previous studies have focused on prefrontal activation in young adults diagnosed with major depressive disorder (MDD) and suicidality via functional near-infrared spectroscopy (fNIRS).A total of 59 healthy controls (HCs), 35 patients MDD but without suicidality, 25 between the ages 18-34 years, were enrolled. Changes oxygenated hemoglobin (oxy-Hb) levels cortex at baseline, 4 weeks, 8 evaluated using a protocol consisting three consecutively repeated trials rest, speech, verbal fluency...
This study aimed to investigate differences in prefrontal cortex activation between older adults with and without depressive symptoms during cognitive tasks using functional near-infrared spectroscopy (fNIRS). We examined 204 participants psychiatric or neurological disorders who completed the Geriatric Depression Scale, digit span, Verbal Fluency Test, Stroop test. At same time, was recorded fNIRS. During test, significantly reduced hemodynamics were observed depressive-symptom group. The...
An efficient method for the extraction of hemodynamic response in near-infrared spectroscopy (NIRS) systems is proposed to increase spatial and temporal resolution without hardware overhead. The performance improvement attributed high-signal-to-noise-ratio (SNR) receivers, a modulation scheme, multi input output (MIMO) based data algorithm. shows 72% increment figure merit (FOM) compared conventional designs. Experimental results support validity system.
Measuring muscle fatigue during exercise is crucial for effective sports training. Muscle oxygen saturation change through hemodynamics measurement generally used to measure performance as well accumulated fatigue. The authors proposed a novel measuring device using near-infrared spectroscopy (NIRS) non-invasively via an optical source and receiver. They designed eight-channel NIRS patch, driven by application-specific integrated circuit, validated the with thigh muscles of healthy subjects...