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Olfactory Transcranial Focused Ultrasound (O-tFUS)

15. juni 2026 opdateret af: Bernadette Cortese, Medical University of South Carolina

Modulation of Olfactory Valence by Transcranial Focused Ultrasound (tFUS)

This study investigates the causal effects of low-intensity transcranial focused ultrasound (tFUS) on odor valence perception and odor-elicited avoidance behaviors in healthy adults. Participants undergo sham and active tFUS targeting the amygdala (AMYG) and ventral striatal olfactory tubercle (VSOT) in a within-subject, randomized, sham-controlled crossover design. Outcomes include subjective odor ratings and objective neurophysiological and behavioral indices of odor valence processing. This research is exploratory and mechanistic in nature and is not intended to evaluate clinical safety or therapeutic efficacy.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

28

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

  • Navn: Nicole Cash, Study Coordinator
  • Telefonnummer: 843-790-3449
  • E-mail: cashni@musc.edu

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Age 18-65 years
  • Healthy adult volunteers
  • Normal olfactory function (Sniffin' Sticks total TDI ≥ 30.75)
  • Ability to provide informed consent
  • English fluency sufficient for task completion

Exclusion Criteria:

  • MRI or tFUS contraindications (e.g., metal implants, claustrophobia, pregnancy)
  • Sinonasal conditions affecting airflow or smell
  • Current use of medications that alter olfaction
  • Positive urine drug screen

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Tredobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Active tFUS targeting the Amygdala (AMYG)
Active tFUS of the bilateral Amygdala randomized at one of the three stimulation visits
Enhed: transcranial focused ultrasound (tFUS)
non-invasive brain stimulation using tFUS
Eksperimentel: Active tFUS targeting the Ventral Striatal Olfactory Tubercle (VSOT)
Active tFUS of the bilateral VSOT randomized at one of the three stimulation visits
Enhed: transcranial focused ultrasound (tFUS)
non-invasive brain stimulation using tFUS
Sham-komparator: Sham tFUS
Sham tFUS randomized at one of three stimulation visits
Enhed: transcranial focused ultrasound (tFUS)
non-invasive brain stimulation using tFUS

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Odor Valence Rating
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Participant rating of odor pleasantness on a 0-100 mm visual analog scale (e.g., unpleasant → pleasant)
from the baseline visit until the third follow-up visit (about 1 month)
Late Positive Potential
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Mean EEG amplitude (400-800 ms) at centro-parietal sites to olfactory-visual stimuli
from the baseline visit until the third follow-up visit (about 1 month)
Sniff Volume
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Total nasal airflow (in mL) per odor trial, measured via nasal cannula or spirometer
from the baseline visit until the third follow-up visit (about 1 month)
Corrugator Supercilii EMG Activity
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Mean EMG amplitude from facial muscle sensitive to negative affect and aversion
from the baseline visit until the third follow-up visit (about 1 month)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Odor Intensity Rating
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Participant rating of odor intensity on a 0-100 mm visual analog scale (e.g., not at all → extremely)
from the baseline visit until the third follow-up visit (about 1 month)
Odor Avoidance Rating
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Participant rating of their desire to avoid the odor on a 0-100 mm visual analog scale (e.g., "not at all" → "extreme")
from the baseline visit until the third follow-up visit (about 1 month)
Sniff Rate
Tidsramme: from the baseline visit until the third follow-up visit (about 1 month)
Breaths per min or per trial window in response to odor exposure
from the baseline visit until the third follow-up visit (about 1 month)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Medical University of South Carolina

Samarbejdspartnere

National Institutes of Health (NIH)
National Institute on Deafness and Other Communication Disorders (NIDCD)

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

1. september 2026

Primær færdiggørelse (Anslået)

30. april 2028

Studieafslutning (Anslået)

30. april 2028

Datoer for studieregistrering

Først indsendt

10. juni 2026

Først indsendt, der opfyldte QC-kriterier

15. juni 2026

Først opslået (Faktiske)

22. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

22. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. juni 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • Pro00150452
  • 1R21DC023711-01 (U.S. NIH-bevilling/kontrakt)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

Results (raw data and summarized) will be shared. A final de-identified data set will be made available for retrieval and analysis through OpenNeuro.org. All study protocols, including detailed descriptions of the study structure, data formats, and analytical methods, will be made available to ensure transparency and reproducibility. Associated documentation, including data dictionaries, codebooks, and analysis scripts, will be provided to enable others to replicate our methodology and build upon our findings. Data will be made available after publication of the findings.

IPD-delingstidsramme

Data will be made available after publication of the findings. Data will be retained long enough to support the reproducibility of our published findings, the re-use by others, and as long as it is of value to the research community and/or public.

IPD-delingsadgangskriterier

Data will be identifiable through a search engine for the title and other key words including the Modality: EEG, Task: odor-enhanced visual processing, Diagnosis: healthy controls, and Study Type: crossover. Additionally, we will provide the Openneuro Accession Number in any study communication.

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • ANALYTIC_CODE
  • CSR

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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