Denne side blev automatisk oversat, og nøjagtigheden af ​​oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

Stability of Motor Output in Aging Adults

5. marts 2015 opdateret af: US Department of Veterans Affairs

Corticobulbar Motor Output in Aging Adults

The goal of this project is to examine the area of the brain that controls muscle movement for a group of muscles important for swallowing, and to see how that area changes over 2 weeks of time.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

A large number of our nation's veterans develop dysphagia due to the myriad of potential etiological sources of swallowing disorders, including stroke and head and neck cancer. The Veteran's Health Administration has recently identified dysphagia as a major clinical focus for the VA system (Sullivan & Dennis, 2006). In order to accurately assess adaptations in motor cortex, it is first necessary to have a reliable tool for measuring organizational representation in the motor cortex. Transcranial magnetic stimulation (TMS) is a desirable choice for such measurement because of the ability to identify causative relationships between an area of motor cortex stimulated and muscle response. Therefore, the specific research objectives of this proposal are:

  1. To demonstrate the reproducibility of TMS mapping of the submental muscle group in healthy older adults between 60 and 80 years of age
  2. To determine the neural representation of submental musculature in the motor cortex of healthy older adults between 60 and 80 years of age.

Twenty healthy adults, 10 men and 10 women, between the ages of 60 and 80 years will serve as research participants. TMS will be used to establish motor maps of the submental muscles. Subjects will undergo two testing sessions, on day 1 and day 14. The results from each session will be compared to assess excitability and representation within the motor cortex, and to assess stability and reliability of measurement.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

20

Kontakter og lokationer

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

Studiesteder

    • Florida
      • Gainesville, Florida, Forenede Stater, 32608
        • North Florida/South Georgia Veterans Health System

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

60 år til 80 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Healthy adults between 60 and 80 years of age

Beskrivelse

Inclusion Criteria:

  • Between 60 and 80 years of age

Exclusion Criteria:

  • History of dysphagia
  • History of neurologic disease
  • History of head or neck cancer
  • History of stroke
  • Untreated hypertension
  • History of a heart condition or heart disease
  • Currently pregnant
  • Contraindication to TMS including:

    • Metallic hardware on the scalp in the area where TMS will be applied
    • Cardiac pacemaker
    • Implanted medication pumps or an intracardiac line
    • Prior diagnosis of seizure or epilepsy in the subject (childhood history of benign febrile seizure will not be a contraindication)
    • Poorly controlled migraine headaches
    • Previous brain neurosurgery
    • Medications that can lower seizure threshold (Appendix B)
    • Unstable medical conditions
    • Lowest motor thresholds above 80% on TMS

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
1
20 healthy participants between 60 and 80 years of age. Ten men and 10 women.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Mean Motor Evoked Potential Amplitude for Submental Cortical Representation
Tidsramme: 2 weeks
Cortical sites are stimulated sequentially from the SOLMT in the anterior direction. At each site, 5 pulses of 110% of the MEP threshold obtained at the SOLMT are delivered and recorded. If a site produces no MEP in 3/5 pulses it is considered non-submental. This process is continued until the entire submental representation is surrounded by non-submental responsive sites. The number of sites is used to calculate the area of submental representation. The mean sEMG amplitudes of the submental muscles for each of these sites is then calculated for the mean MEP measure.
2 weeks

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Motor Map Center of Gravity
Tidsramme: 2 weeks
Position on the TMS motor map with highest amplitude response to stimulation in the muscles of interest (submental muscles).
2 weeks
Area of Submental Representation
Tidsramme: 2 weeks
Cortical sites are stimulated sequentially from the SOLMT in the anterior direction. At each site, 5 pulses of 110% of the MEP threshold obtained at the SOLMT are delivered and recorded. If a site produces no MEP in 3/5 pulses it is considered non-submental. This process is continued until the entire submental representation is surrounded by non-submental responsive sites. The number of sites is used to calculate the area of submental representation.
2 weeks

Samarbejdspartnere og efterforskere

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

Sponsor

Efterforskere

  • Ledende efterforsker: Karen Hegland, PhD, North Florida/South Georgia Veterans Health System

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

1. november 2009

Primær færdiggørelse (Faktiske)

1. oktober 2011

Studieafslutning (Faktiske)

1. oktober 2011

Datoer for studieregistrering

Først indsendt

1. september 2009

Først indsendt, der opfyldte QC-kriterier

1. september 2009

Først opslået (Skøn)

2. september 2009

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

8. april 2015

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

5. marts 2015

Sidst verificeret

1. december 2014

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • C6697-M

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 .

Søg i lignende forsøg