Source 1primary paper2025MED
Toolkit/functional near-infrared spectroscopy
functional near-infrared spectroscopy
Also known as: fNIRS, resting-state fNIRS
Taxonomy: Technique Branch / Method. Workflows sit above the mechanism and technique branches rather than replacing them.
Summary
functional near-infrared spectroscopy was used to detect functional connections between regions of interest and the whole brain in individuals with ASD
Usefulness & Problems
Why this is useful
Resting-state fNIRS is used here to measure cortical functional connectivity during the treatment course. It serves as one of the multimodal neural readouts accompanying clinical assessment.; longitudinal measurement of cortical functional connectivity; monitoring network-level changes during neuromodulation treatment; fNIRS was used in this study to detect functional connections between regions of interest and the whole brain in ASD. It served as a physiological readout alongside behavioral scales.; measuring functional connectivity changes associated with intervention
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Resting-state fNIRS is used here to measure cortical functional connectivity during the treatment course. It serves as one of the multimodal neural readouts accompanying clinical assessment.
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longitudinal measurement of cortical functional connectivity
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monitoring network-level changes during neuromodulation treatment
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fNIRS was used in this study to detect functional connections between regions of interest and the whole brain in ASD. It served as a physiological readout alongside behavioral scales.
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measuring functional connectivity changes associated with intervention
Problem solved
It helps track whether cortical network organization changes alongside behavioral recovery. In this case it detected increased connectivity, especially in prefrontal and prefrontal-sensorimotor networks.; provides a modality for tracking cortical functional connectivity changes over time; It provides a noninvasive way to assess whether the intervention is associated with changes in cortical functional connectivity.; provides a brain connectivity readout to accompany behavioral assessments
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It helps track whether cortical network organization changes alongside behavioral recovery. In this case it detected increased connectivity, especially in prefrontal and prefrontal-sensorimotor networks.
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provides a modality for tracking cortical functional connectivity changes over time
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It provides a noninvasive way to assess whether the intervention is associated with changes in cortical functional connectivity.
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provides a brain connectivity readout to accompany behavioral assessments
Problem links
provides a brain connectivity readout to accompany behavioral assessments
LiteratureIt provides a noninvasive way to assess whether the intervention is associated with changes in cortical functional connectivity.
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It provides a noninvasive way to assess whether the intervention is associated with changes in cortical functional connectivity.
provides a modality for tracking cortical functional connectivity changes over time
LiteratureIt helps track whether cortical network organization changes alongside behavioral recovery. In this case it detected increased connectivity, especially in prefrontal and prefrontal-sensorimotor networks.
Source:
It helps track whether cortical network organization changes alongside behavioral recovery. In this case it detected increased connectivity, especially in prefrontal and prefrontal-sensorimotor networks.
Published Workflows
Objective: To longitudinally evaluate clinical and neural outcomes following right central thalamic transcranial focused ultrasound treatment in a patient with chronic minimally conscious state.
Why it works: The paper presents a multimodal longitudinal design in which behavioral scales, fNIRS connectivity, and EEG spectral measures are tracked alongside repeated thalamic tFUS sessions to assess whether clinical recovery parallels neural reorganization.
modulation of thalamus-linked consciousness circuitrynormalization of dysfunctional cortical rhythmsreintegration of large-scale brain networkstranscranial focused ultrasound treatmentlongitudinal clinical assessmentresting-state fNIRS monitoringEEG spectral monitoring
Stages
- 1.Therapeutic tFUS treatment course(functional_characterization)
This stage delivers the neuromodulation intervention whose clinical and neural effects are being evaluated.
Selection: Repeated right central thalamus stimulation was administered as the intervention under study.
- 2.Longitudinal clinical and multimodal neural assessment(confirmatory_validation)
This stage tests whether behavioral recovery is accompanied by neural reorganization and whether the intervention is tolerated.
Selection: Behavioral scales, fNIRS, and EEG were used to assess clinical and neural outcomes after treatment.
Steps
- 1.Administer repeated right central thalamic tFUS sessionstherapeutic neuromodulation intervention
To apply non-invasive thalamic neuromodulation in a patient with chronic minimally conscious state.
The intervention must be delivered before longitudinal outcomes can be assessed.
- 2.Assess behavioral recovery with clinical scales
To measure clinical changes in consciousness and behavior over the treatment course.
Clinical assessment is needed to determine whether the intervention is associated with meaningful behavioral recovery.
- 3.Measure cortical functional connectivity with resting-state fNIRSnetwork monitoring assay
To track cortical functional connectivity changes accompanying treatment.
fNIRS provides a neural network-level readout to interpret whether behavioral recovery is accompanied by cortical reorganization.
- 4.Analyze neurophysiological dynamics with EEGspectral monitoring assay
To monitor neurophysiological dynamics and pathological slow-wave activity during treatment.
EEG provides a complementary neural readout to test whether recovery parallels normalization of dysfunctional cortical rhythms.
Objective: Apply low-intensity transcranial focused ultrasound to a prefrontal cortical target in a child with ASD and evaluate behavioral and functional-connectivity changes over a four-week treatment course.
Why it works: The abstract frames the workflow around the idea that ASD involves cortical malfunction and that low-intensity transcranial focused ultrasound may modulate cortical function; behavioral scales and fNIRS are then used to assess clinical and network-level changes.
rectification of cortical dysfunctionincreased functional connections between SM1 and other cortical regionsrepeated transcranial focused ultrasound sessionsbehavioral scale assessmentfunctional near-infrared spectroscopy connectivity measurement
Taxonomy & Function
Primary hierarchy
Technique Branch
Method: A concrete measurement method used to characterize an engineered system.
Techniques
Functional AssayTarget processes
recombinationImplementation Constraints
cofactor dependency: cofactor requirement unknownencoding mode: genetically encodedimplementation constraint: context specific validationoperating role: sensor
The abstract supports the need for resting-state fNIRS measurements collected longitudinally during the intervention period. Specific instrumentation and analysis pipeline details are not provided.; requires resting-state acquisition; requires longitudinal assessment design; The method requires fNIRS measurement and analysis of connectivity between selected cortical regions and the whole brain. The abstract does not describe the acquisition or analysis pipeline.; requires defined regions of interest and whole-brain connectivity analysis
The abstract does not show that fNIRS alone can determine causality or fully characterize all neural mechanisms of recovery. Quantitative thresholds and analytic details are not given.; the abstract does not provide quantitative connectivity metrics; used as a monitoring modality rather than as the intervention itself; The abstract does not show that fNIRS alone can establish causality or define the exact mechanism of ultrasound action.; the abstract does not specify preprocessing, connectivity metric, or statistical thresholds
Validation
Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication
Observations
successHuman Clinicaltherapeutic usehuman
resting-state fNIRS
Inferred from claim c2 during normalization. Thalamic transcranial focused ultrasound was associated with enhanced cortical functional connectivity, especially within the prefrontal cortex and between prefrontal-sensorimotor networks. Derived from claim c2. Quoted text: fNIRS revealed a systematic enhancement of functional connectivity, especially within the prefrontal cortex and between prefrontal-sensorimotor networks.
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successHuman Clinicalmechanistic demohuman
functional near-infrared spectroscopy
Inferred from claim c2 during normalization. After low-intensity transcranial focused ultrasound, functional near-infrared spectroscopy indicated increased functional connections between SM1 and other cortical regions as well as the whole brain. Derived from claim c2.
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Supporting Sources
Source 2primary paper2026MED
Ranked Claims
Thalamic transcranial focused ultrasound was associated with enhanced cortical functional connectivity, especially within the prefrontal cortex and between prefrontal-sensorimotor networks.
fNIRS revealed a systematic enhancement of functional connectivity, especially within the prefrontal cortex and between prefrontal-sensorimotor networks.
The thalamic transcranial focused ultrasound intervention was well-tolerated with no adverse events or structural brain changes observed in this case.
The intervention was well-tolerated with no adverse events or structural brain changes observed.
Thalamic transcranial focused ultrasound was associated with progressive suppression of pathological frontal Delta and Theta power on EEG.
EEG analysis showed a marked, progressive suppression of pathological slow-wave (Delta and Theta) power in frontal regions.
Right central thalamic transcranial focused ultrasound was associated with progressive behavioral recovery and emergence from the minimally conscious state in a patient with chronic disorder of consciousness.
A patient in a chronic minimally conscious state underwent a course of tFUS treatment targeting the right central thalamus... The patient demonstrated a progressive and clinically significant behavioral recovery, ultimately emerging from the minimally conscious state.
session duration 20 minutessessions per week 3 sessions/weektotal sessions 12 sessionstreatment duration 4 weeks
Low-intensity transcranial focused ultrasound stimulation applied to the left dorsolateral prefrontal cortex was associated with improvements in social interaction and stereotyped behavior in a boy with autism spectrum disorder.
session duration 30 minutestotal sessions 20 sessionstreatment duration 4 weeks
After low-intensity transcranial focused ultrasound, functional near-infrared spectroscopy indicated increased functional connections between SM1 and other cortical regions as well as the whole brain.
Low-intensity transcranial focused ultrasound in autism spectrum disorder potentially rectified cortical dysfunction.
Approval Evidence
2 sources2 linked approval claimsfirst-pass slug functional-near-infrared-spectroscopy
We conducted comprehensive longitudinal assessments using clinical scales ... Besides, resting-state functional near-infrared spectroscopy (fNIRS) to measure cortical functional connectivity.
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functional near-infrared spectroscopy was used to detect functional connections between regions of interest and the whole brain in individuals with ASD
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network modulationsupports
Thalamic transcranial focused ultrasound was associated with enhanced cortical functional connectivity, especially within the prefrontal cortex and between prefrontal-sensorimotor networks.
fNIRS revealed a systematic enhancement of functional connectivity, especially within the prefrontal cortex and between prefrontal-sensorimotor networks.
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mechanistic associationsupports
After low-intensity transcranial focused ultrasound, functional near-infrared spectroscopy indicated increased functional connections between SM1 and other cortical regions as well as the whole brain.
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Comparisons
Source-stated alternatives
The paper pairs fNIRS with EEG and clinical scales as complementary assessments rather than presenting a direct alternative comparison.; No alternative measurement modality is explicitly mentioned in the abstract.
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The paper pairs fNIRS with EEG and clinical scales as complementary assessments rather than presenting a direct alternative comparison.
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No alternative measurement modality is explicitly mentioned in the abstract.
Source-backed strengths
used longitudinally in a multimodal assessment framework; revealed systematic enhancement of functional connectivity in this case; used here to detect functional connections between regions of interest and the whole brain
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used longitudinally in a multimodal assessment framework
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revealed systematic enhancement of functional connectivity in this case
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used here to detect functional connections between regions of interest and the whole brain
Compared with barcoded Cre recombinase mRNA barcode platform
functional near-infrared spectroscopy and barcoded Cre recombinase mRNA barcode platform address a similar problem space because they share recombination.
Shared frame: same top-level item type; shared target processes: recombination
Strengths here: appears more independently replicated; looks easier to implement in practice.
Compared with calcium imaging
functional near-infrared spectroscopy and calcium imaging address a similar problem space because they share recombination.
Shared frame: same top-level item type; shared target processes: recombination
Strengths here: looks easier to implement in practice.
Compared with two-photon excitation microscopy
functional near-infrared spectroscopy and two-photon excitation microscopy address a similar problem space because they share recombination.
Shared frame: same top-level item type; shared target processes: recombination
Strengths here: appears more independently replicated; looks easier to implement in practice.
Ranked Citations
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