Traumatic Brain Injury
Conditions
Keywords
Traumatic brain injury, transcranial direct current stimulation, electroencephalography, cognition, veteran traumatic brain injury
Brief summary
The purpose of the study is to test whether low level electric stimulation, called transcranial Direct Current Stimulation (tDCS), on the part of the brain (i.e., presupplementary motor area) thought to aid in memory will improve verbal retrieval in military veteran participants with histories of traumatic brain injuries. The primary outcome measures are neuropsychological assessments of verbal retrieval, and the secondary measures are neuropsychological assessments of other cognitive abilities and electroencephalography (EEG) measures. Additionally, the study will examine the degree to which baseline assessments of cognition and concussion history predict responses to treatment over time, both on assessments administered within the intervention period and at follow-up.
Detailed description
Using two treatment arms, the study will examine improvement of verbal retrieval and other cognitive deficits associated with remote traumatic brain injury by comparing (1) 1 milliamp transcranial direct current stimulation (tDCS) active treatment applied to presupplementary motor area for 20 minutes over 15 sessions to (2) sham tDCS following the same schedule. Additionally, after completing the initial active or sham treatment and 3-month follow-up testing sessions, selected participants will be invited back for newly assigned treatment conditions, 20 minutes over 15 sessions and will be and re-evaluated at 2- and 3-months follow-up testing sessions. Veterans with histories of traumatic brain injuries and observed cognitive deficits will be randomly assigned to one of the two treatment arms (and re-assigned for the second round of intervention, as described above). Primary outcome verbal retrieval measures, secondary neuropsychological and electroencephalography (EEG) measures, and prescreening assessments for study concussion history and contraindications for treatment will be collected prior to being assigned to a treatment arm (i.e., baseline). Primary outcome verbal retrieval measures and secondary neuropsychological and electroencephalography (EEG) measures will be collected after treatment sessions 5, 10, and 15 and two times following treatment competition (i.e., 2-months and 3-months). For participants selected for the second round of intervention, primary outcome verbal memory measures and secondary neuropsychological and electroencephalography (EEG) measures will be collected again after treatment sessions 5, 10, and 15 and two times following competition of the second treatment (i.e., 2-months and 3-months).
Interventions
DEVICETranscranial direct current stimulation
Transcranial direct current stimulation will be delivered via a Neuroelectrics Starstim tES. Stimulation will consist of 1 milliamp stimulation, with anodal stimulation delivered at electrode Fz (International 10/10 System for electroencephalography electrode placement) and electrodes F7, FP1, FP2, and F8 as returns. All electrodes are 1 cm diameter Ag/AgCl electrodes and make contact with the scalp via connective gel. Stimulation will linearly ramp up from 0 milliamps to 1 milliamp over 60 seconds, then remain at 1 milliamp of stimulation over 20 minutes, and finally ramping down at to 0 milliamps over 60 seconds.
DEVICEsham tDCS
Sham transcranial direct current stimulation will be delivered via a Neuroelectrics Starstim tES. The sham setup will consist of anodal electrode Fz (International 10/10 System for electroencephalography electrode placement) and electrodes F7, FP1, FP2, and F8 as returns. All electrodes are 1 cm diameter Ag/AgCl electrodes and make contact with the scalp via connective gel. Stimulation will linearly ramp up from 0 milliamps to 1 milliamp over 60 seconds, ramp down to 0 milliamps over 60 seconds and then be left off for 20 minutes.
Sponsors
The University of Texas at Dallas
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Caregiver, Outcomes Assessor)
Masking description
Participants, assessors, and technicians interacting with participants will be blind to assigned conditions.
Intervention model description
Participants will be randomly assigned to 1 of 2 treatment arms: (1) 1 milliamp transcranial direct current stimulation (tDCS) active treatment applied to presupplementary motor area for 20 minutes over 15 sessions to (2) sham tDCS following the same schedule. Additionally, after completing the initial active or sham treatment and 3-month follow-up testing sessions, selected participants will be invited back for newly assigned treatment conditions, 20 minutes over 15 sessions and will be and re-evaluated at 2- and 3-months follow-up testing sessions.
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
Participants are to be between the ages of 18-75, have previously served in the US armed services, and have had a traumatic brain injury that has led to a verbal retrieval deficit based on neuropsychological testing criteria. Traumatic brain injury must be in the mild to moderate range based on evaluation, including, the Ohio State TBI Identification Method (administered by our research group). You must be fluent in speaking and reading English.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Controlled Oral Word Association Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change on the Control Word Association Test from baseline to 3-months. Metric: Number of Correct Items Generated Benton, L.A., Hamsher, K., & Sivan, A.B., (1994). Multilingual aphasia examination. Iowa City: AJA Associates. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Controlled Oral Word Association Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change on the Control Word Association Test from baseline to 2-months. Metric: Number of Correct Items Generated Benton, L.A., Hamsher, K., & Sivan, A.B., (1994). Multilingual aphasia examination. Iowa City: AJA Associates. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment in Category Fluency | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in Category Fluency from baseline to 3-months. Metric: Number of Correct Items Generated Benton, L.A., Hamsher, K., & Sivan, A.B., (1994). Multilingual aphasia examination. Iowa City: AJA Associates. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment in Category Fluency | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in Category Fluency from baseline to 2-months. Metric: Number of Correct Items Generated Benton, L.A., Hamsher, K., & Sivan, A.B., (1994). Multilingual aphasia examination. Iowa City: AJA Associates. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Semantic Object Retrieval Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in Semantic Object Retrieval Test from baseline to 3-months. Metric: Number of Correct Retrievals Kaplan, E., Goodglass, H., & Weintraub, S., (1983). Boston Naming Test (2nd ed.). Lea & Febiger: Philadelphia. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Semantic Object Retrieval Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in Semantic Object Retrieval Test from baseline to 2-months. Metric: Number of Correct Retrievals Kaplan, E., Goodglass, H., & Weintraub, S., (1983). Boston Naming Test (2nd ed.). Lea & Febiger: Philadelphia. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Boston Naming Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in Boston Naming Test from baseline to 3-months. Metric: Number of Correct Names Retrieved Kraut, M.A., Cherry, B., Pitcock, C.B., Anand, R., Li, J. Vestal, L., Henderson, V.W., and Hart, J. Jr. (2007). The Semantic Object Retrieval Test (SORT) in amnestic cognitive impairment. Cogn. Behav. Neurol. 20, 62- 67. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Boston Naming Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in Boston Naming Test from baseline to 2-months. Metric: Number of Correct Names Retrieved Kraut, M.A., Cherry, B., Pitcock, C.B., Anand, R., Li, J. Vestal, L., Henderson, V.W., and Hart, J. Jr. (2007). The Semantic Object Retrieval Test (SORT) in amnestic cognitive impairment. Cogn. Behav. Neurol. 20, 62- 67. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on California Verbal Learning Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in California Verbal Learning Test from baseline to 3-months. Metric: Number of Correct Retrievals Delis DC, Kramer JH, Kaplan E, Ober BA. (2017). California verbal learning test (3rd Ed.). Pearson Publishing: San Antonio, TX. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on California Verbal Learning Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in California Verbal Learning Test from baseline to 2-months. Metric: Number of Correct Retrievals Delis DC, Kramer JH, Kaplan E, Ober BA. (2017). California verbal learning test (3rd Ed.). Pearson Publishing: San Antonio, TX. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Rey-Osterrieth Complex Figure Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in Rey-Osterrieth Complex Figure Test scores from baseline to 3-months. Metric: Score Rey, A. (1941). L'examen psychologique dans les cas d'encéphalopathie traumatique. (Les problems.). \[The psychological examination in cases of traumatic encepholopathy. Problems.\]. Archives de Psychologie, 28, 215- 285. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Rey-Osterrieth Complex Figure Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in Rey-Osterrieth Complex Figure Test scores from baseline to 2-months. Metric: Score Rey, A. (1941). L'examen psychologique dans les cas d'encéphalopathie traumatique. (Les problems.). \[The psychological examination in cases of traumatic encepholopathy. Problems.\]. Archives de Psychologie, 28, 215- 285. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Digit Symbol Substitution Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change on the Digit Symbol Substitution Test from baseline to 3-months. Metric: Number of Items Wechsler, D., (2008). Wechsler adult intelligence scale-Fourth Edition (WAIS-IV). San Antonio, TX: NCS Pearson. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Trail Making Test (Part A) | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change on the Trail Making Test (Part A) from baseline to 3-months. Metric: Time to Solution Reitan, R.M., (1958). Validity of the Trail Making Test as an indicator of organic brain damage. Percept. Motor Skill., 8, 271-276. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Grooved Pegboard Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change on the Grooved Pegboard Test from baseline to 3-months. Metric: Completion Time Matthews, C.G., and Klove, H. (1964). Instruction manual for the adult neuropsychology test. Madison. Wis: University of Wisconsin Medical School. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Grooved Pegboard Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change on the Grooved Pegboard Test from baseline to 2-months. Metric: Completion Time Matthews, C.G., and Klove, H. (1964). Instruction manual for the adult neuropsychology test. Madison. Wis: University of Wisconsin Medical School. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Digit Symbol Substitution Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change on the Digit Symbol Substitution Test from baseline to 2-months. Metric: Number of Items Wechsler, D., (2008). Wechsler adult intelligence scale-Fourth Edition (WAIS-IV). San Antonio, TX: NCS Pearson. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Trail Making Test (Part A) | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change on the Trail Making Test (Part A) from baseline to 2-months. Metric: Time to Solution Reitan, R.M., (1958). Validity of the Trail Making Test as an indicator of organic brain damage. Percept. Motor Skill., 8, 271-276. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Trail Making Test (Part B) | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change on the Trail Making Test (Part B) from baseline to 3-months. Metric: Time to Solution Reitan, R.M., (1958). Validity of the Trail Making Test as an indicator of organic brain damage. Percept. Motor Skill., 8, 271-276. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Trail Making Test (Part B) | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change on the Trail Making Test (Part B) from baseline to 2-months. Metric: Time to Solution Reitan, R.M., (1958). Validity of the Trail Making Test as an indicator of organic brain damage. Percept. Motor Skill., 8, 271-276. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Delis Kaplan Color Word Interference Test | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change on the Delis Kaplan Color Word Interference Test from baseline to 3-months. Metric: Time to Name Items Delis, D.C., Kaplan, E., & Kramer, J.H., (2001). Delis-Kaplan Executive Function System. San Antonio, TX: The Psychological Corporation. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Delis Kaplan Color Word Interference Test | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change on the Trail Making Test (Part B) from baseline to 2-months. Metric: Time to Name Items Reitan, R.M., (1958). Validity of the Trail Making Test as an indicator of organic brain damage. Percept. Motor Skill., 8, 271-276. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Digit Span Forward | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in Digit Span Forward from baseline to 3-months. Metric: Memory Span Wechsler, D., (2008). Wechsler adult intelligence scale-Fourth Edition (WAIS-IV). San Antonio, TX: NCS Pearson. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Digit Span Forward | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in Digit Span Forward from baseline to 2-months. Metric: Memory Span Wechsler, D., (2008). Wechsler adult intelligence scale-Fourth Edition (WAIS-IV). San Antonio, TX: NCS Pearson. |
| Treatment group differences in change from Baseline to 3-months Post-Treatment on the Digit Span Backward | Outcome measures will be assessed as change over a period of 17 weeks: Change from baseline to 3-month Post-Treatment | Evaluation of treatment group differences in change in Digit Span Backward from baseline to 3-months. Metric: Memory Span Wechsler, D., (2008). Wechsler adult intelligence scale-Fourth Edition (WAIS-IV). San Antonio, TX: NCS Pearson. |
| Treatment group differences in change from Baseline to 2-months Post-Treatment on the Digit Span Backward | Outcome measures will be assessed as change over a period of 13 weeks: Change from baseline to 2-month Post-Treatment | Evaluation of treatment group differences in change in Digit Span Backward from baseline to 2-months. Metric: Memory Span Wechsler, D., (2008). Wechsler adult intelligence scale-Fourth Edition (WAIS-IV). San Antonio, TX: NCS Pearson. |
Countries
United States
Contacts
Primary ContactAshna Adhikari
Backup ContactJill Ritter, BS
Outcome results
None listed