The Short-term Effects of Noninvasive Electrical Brain Stimulation on Dual Tasking in Older Adults
Optimization of Transcranial Direct Current Stimulation (tDCS) for Dual Task Performance in Older Adults With and Without a History of Falls
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
Studientyp
Studientyp
Einschreibung (Tatsächlich)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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Tel Aviv, Israel, 64239
- Laboratory for Gait and Neurodynamics, Tel Aviv Sourasky Medical Center
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Massachusetts
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Roslindale, Massachusetts, Vereinigte Staaten, 02131
- Hebrew Rehabilitation Center
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
Inclusion Criteria:
"Faller" group
- Aged 65 years and older
- Able to read, write and communicate in English
- Self-report of 2 or more falls within the past 6 months
"Non-Faller" Group
- Aged 65 years and older
- Able to read, write, and communicate in English
- Self-report of 1 or no (zero) falls within the past 6 months
Exclusion Criteria:
- Self-reported diagnosis of Parkinson's disease, Alzheimer's disease or dementia, multiple sclerosis, history of stroke or other neurodegenerative disorder.
- Self-reported active cancer for which chemo-/radiation therapy is being received.
- Hospitalization within the past 3 months due to acute illness or as a result of a musculoskeletal injury significantly affecting gait and balance.
- Montreal Cognitive Assessment score <18, or insufficient understanding of study procedures following review of the Informed Consent Form. Understanding will be assessed by asking the participant to answer the following three questions: 1) What is the purpose of this study? 2) What are the risks of study involvement? 3) If you decide to participate, are you allowed to withdraw from the study at any time? Answers will be recorded by study personnel on the "Assessment of Protocol Understanding" form (see attached). Insufficient understanding will be defined by one or more incorrect answers, as determined at the discretion of the investigator.
- Inability to stand or ambulate unassisted for at least 25 feet.
- Contraindications to tDCS, including a reported seizure within the past two years, use of neuro-active drugs, the risk of metal objects in the brain, skull, or head, self-reported presence of specific implanted medical devices (e.g., deep brain stimulator, medication infusion pump, cochlear implant), or the presence of any active dermatological condition, such as eczema, on the scalp (see appendix for standardized tDCS screening questionnaire).
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Grundlegende Wissenschaft
- Zuteilung: Zufällig
- Interventionsmodell: Crossover-Aufgabe
- Maskierung: Vervierfachen
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
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Schein-Komparator: Sham Stimulation
The Sham stimulation intervention will consist of one, twenty-minute session of transcranial direct current stimulation (tDCS) that does not target a cortical area but instead, provides just enough current to create tingling sensations across the scalp to mimic the feeling of receiving the real stimulation.
The sham stimulation will use the same number and placement of electrodes as the real stimulation but with a much smaller total current intensity of 0.5 milliamps (mA).
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There will be three different tDCS targets as well as a sham stimulation condition.
The stimulation for each of these conditions will be delivered via 6 already-placed gel electrodes on the participant's scalp with different combinations of current intensities among all the electrodes.
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Experimental: M1 Stimulation
The M1 stimulation intervention consists of one, twenty-minute session of transcranial direct current stimulation (tDCS) targeting the primary motor cortex at a total current intensity of 1.5 mA.
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There will be three different tDCS targets as well as a sham stimulation condition.
The stimulation for each of these conditions will be delivered via 6 already-placed gel electrodes on the participant's scalp with different combinations of current intensities among all the electrodes.
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Experimental: DLPFC Stimulation
The DLPFC stimulation intervention consists of one, twenty-minute session of transcranial direct current stimulation (tDCS) targeting the dorsolateral prefrontal cortex at a total current intensity of 1.5 mA.
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There will be three different tDCS targets as well as a sham stimulation condition.
The stimulation for each of these conditions will be delivered via 6 already-placed gel electrodes on the participant's scalp with different combinations of current intensities among all the electrodes.
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Experimental: M1+DLPFC Stimulation
The M1+DLPFC stimulation intervention consists of one, twenty-minute session of transcranial direct current stimulation (tDCS) targeting the primary motor cortex and the dorsolateral prefrontal cortex simultaneously at a total current intensity of 3.0 mA.
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There will be three different tDCS targets as well as a sham stimulation condition.
The stimulation for each of these conditions will be delivered via 6 already-placed gel electrodes on the participant's scalp with different combinations of current intensities among all the electrodes.
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Dual task cost to standing postural sway speed
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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The dual task cost to standing postural sway speed will be calculated from trials of standing with and without simultaneous performance of a serial subtraction cognitive task.
The dual task cost will be calculated as the percent change in sway speed from single- to dual-task conditions.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Dual task cost to gait speed when walking
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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The dual task cost to gait speed when walking will be calculated from trials of walking with and without simultaneous performance of a serial subtraction cognitive task.
The dual task cost will be calculated as the percent change in gait speed from single- to dual-task conditions.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Dual task cost to postural sway area
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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The dual task cost to standing postural sway area will be calculated from trials of standing with and without simultaneous performance of a serial subtraction cognitive task.
The dual task cost will be calculated as the percent change in postural sway area from single- to dual-task conditions.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Dual task cost to gait variability when walking
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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The dual task cost to gait variability when walking will be calculated from trials of walking with and without simultaneous performance of a serial subtraction cognitive task.
Gait variability will be defined as the coefficient of variation about the average stride time (stride times defined by the time between consecutive heel strides of the same leg).
The dual task cost will be calculated as the percent change in gait variability from single- to dual-task conditions.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task postural sway speed
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task postural sway speed will be calculated from trials of standing without simultaneous performance of a serial subtraction cognitive task.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task postural sway area
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task postural sway area will be calculated from trials of standing without simultaneous performance of a serial subtraction cognitive task.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task gait speed variability when walking
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task gait variability when walking will be calculated from trials of walking without simultaneous performance of a serial subtraction cognitive task.
Gait variability will be defined as the coefficient of variation about the average stride time (stride times defined by the time between consecutive heel strides of the same leg).
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task gait speed when walking
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Single task gait speed when walking will be calculated from trials of walking without simultaneous performance of a serial subtraction cognitive task.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Mobility
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Mobility will be assessed using the Timed Up-and-Go test in which the amount of time it takes for the participant to stand up from a chair, walk three meters, turn around a cone, walk back, and sit down is recorded.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Executive function
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Executive function will be assessed using the Stroop test.
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Cognitive processing speed
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Cognitive processing speed will be assessed using the Symbol Digit Modalities Test (SDMT).
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This outcome will be assessed immediately before and after each 20-minute session of tDCS.
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Attention
Zeitfenster: This outcome will be assessed immediately before and after each 20-minute session of tDCS
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Attention will be assessed using the Visual Search and Attention Test (VSAT).
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This outcome will be assessed immediately before and after each 20-minute session of tDCS
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Brad Manor, Institute for Aging Research, Hebrew SeniorLife
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Studienbeginn
Primärer Abschluss (Tatsächlich)
Primärer Abschluss
Studienabschluss (Tatsächlich)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 2016-26
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