Effects of transcranial LED therapy on the cognitive rehabilitation for diffuse axonal injury due to severe acute traumatic brain injury: study protocol for a randomized controlled trial.

BACKGROUND: Photobiomodulation describes the use of red or near-infrared light to stimulate or regenerate tissue. It was discovered that near-infrared wavelengths (800-900 nm) and red (600 nm) light-emitting diodes (LED) are able to penetrate through the scalp and skull and have the potential to improve the subnormal cellular activity of compromised brain tissue. Different experimental and clinical studies were performed to test LED therapy for traumatic brain injury (TBI) with promising results. One of the proposals of this present study is to develop different approaches to maximize the positive effects of this therapy and improve the quality of life of TBI patients. METHODS/DESIGN: This is a double-blinded, randomized, controlled trial of patients with diffuse axonal injury (DAI) due to a severe TBI in an acute stage (less than 8 h). Thirty two patients will be randomized to active coil helmet and inactive coil (sham) groups in a 1:1 ratio. The protocol includes 18 sessions of transcranial LED stimulation (627 nm, 70 mW/cm2, 10 J/cm2) at four points of the frontal and parietal regions for 30 s each, totaling 120 s, three times per week for 6 weeks, lasting 30 min. Patients will be evaluated with the Glasgow Outcome Scale Extended (GOSE) before stimulation and 1, 3, and 6 months after the first stimulation. The study hypotheses are as follows: (1) transcranial LED therapy (TCLT) will improve the cognitive function of DAI patients and (2) TCLT will promote beneficial hemodynamic changes in cerebral circulation. DISCUSSION: This study evaluates early and delayed effects of TCLT on the cognitive rehabilitation for DAI following severe acute TBI. There is a paucity of studies regarding the use of this therapy for cognitive improvement in TBI. There are some experimental studies and case series presenting interesting results for TBI cognitive improvement but no clinical trials. TRIAL REGISTRATION: ClinicalTrials.gov, NCT03281759 . Registered on 13 September 2017.

Transcranial Direct Current Stimulation for Post-Concussion Syndrome: Study Protocol for a Randomized Crossover Trial.

BACKGROUND: Mild traumatic brain injury (MTBI) represents 70-80% of all treated brain injuries. A considerable proportion of MTBI patients experience post-concussion symptoms for a prolonged period after MTBI, and these symptoms are diagnosed as persistent post-concussion syndrome (PPCS). PPCS is defined as a range of physical, cognitive, and emotional symptoms. However, memory and executive dysfunction seems to be one of the most debilitating symptoms. Recently, non-invasive brain stimulation has been studied as a potential treatment method for traumatic brain injury (TBI) patients. Therefore, our primary goal is to verify the effects of transcranial direct current stimulation (tDCS) in patients with PPCS who demonstrate cognitive deficits in long-term episodic memory, working memory, and executive function following MTBI. METHODS/DESIGN: This is a randomized crossover trial of patients with a history of MTBI with cognitive deficits in memory and executive function. Thirty adult patients will be randomized in a crossover manner to receive three weekly sessions of anodal tDCS (2 mA) at left dorsolateral prefrontal cortex, left temporal cortex, and sham stimulation that will be performed at 7-day intervals (washout period). The clinical diagnosis of PPCS will be determined using the Rivermead Post-Concussion Symptoms Questionnaire. Patients who meet the inclusion criteria will be assessed with a neuropsychological evaluation. A new battery of computerized neuropsychological tests will be performed before and immediately after each stimulation. Statistical analysis will be performed to determine trends of cognitive improvement. DISCUSSION: There is paucity of studies regarding the use of tDCS in TBI patients, and although recent results showed controversial data regarding the effects of tDCS in such patients, we will address specifically patients with PPCS and MTBI and no brain abnormalities on CT scan other than subarachnoid hemorrhage. Moreover, due to the missing information on literature regarding the best brain region to be studied, we will evaluate two different regions to find immediate effects of tDCS on memory and executive dysfunction. CLINICAL TRIAL REGISTRATION: www.ClinicalTrials.gov, identifier NCT02292589 (https://register.clinicaltrials.gov).

Repetitive Transcranial Magnetic Stimulation (rTMS) for the cognitive rehabilitation of traumatic brain injury (TBI) victims: study protocol for a randomized controlled trial.

BACKGROUND: Repetitive Transcranial Magnetic Stimulation (rTMS) has been proposed as a new tool in neurological rehabilitation of victims of traumatic brain injury (TBI). However, its usefulness to treat this condition has never been tested rigorously. The primary goal is to conduct a study protocol to determine whether rTMS used to cognitive rehabilitation of victims of TBI with diffuse axonal injury (DAI) is a safe instrument and if it enhances cognitive function recovery. METHODS: Double-blind randomized controlled trial of patients with diffuse axonal injury. Thirty-six patients will be randomized to either an active coil group or sham group in a 1:1 ratio. rTMS protocol: 10 sessions of high-frequency rTMS (10 Hz) over the left dorsolateral prefrontal cortex (DLPFC). Cortical Excitability measures will be obtained. Neuropsychological evaluations will be performed 1 week before, 1 week and 3 months after rTMS. There are 2 study hypotheses: (1) rTMS over the left DLPFC in patients with DAI will improve cognitive function and (2) whether rTMS is safe in TBI patients. DISCUSSION: This study evaluates the immediate and delayed effects of rTMS over the DLPFC on the cognitive domain of patients with DAI following TBI. rTMS has shown good results in treating major depression and may be promising for patients with TBI. As such, the results of this study can greatly modify the cognitive rehabilitation strategies. TRIAL REGISTRATION: This trial was registered in clinicaltrials.gov ( NCT02167971 ) on 17 June 2014.

Velocidade de processamento da informação em adolescentes de escolas públicas e privadas / Speed of Information processing in adolescents from public and private schools / Velocidad de Tratamiento de la información en los adolescentes de escuelas públicas y privadas

A velocidade de processamento da informação se refere à atividade mental por certo período de tempo. O objetivo do estudo foi investigar esta velocidade de processamento em adolescentes de 14 anos de escolas públicas e privadas. Foram selecionadas 14 adolescentes (sexo feminino) que cursavam o 9º ano do Ensino Fundamental ou o 1º ano do Ensino Médio. Foram avaliadas por meio do IVP (Código, Procurar símbolos e Cancelamento) da WISC-IV e do Teste de Trilhas Coloridas Infantil (TTCI). O teste qui-quadrado apontou maior número de quase erros no TTCI em meninas que frequentavam escola privada. Nenhuma diferença foi encontrada entre os grupos no IVP. Embora o tipo de escola não pareça produzir diferenças entre os grupos no IVP, o número de quase erros, indicativo de distração, mostrou-se mais sensível para identificar essas diferenças. Sugere-se que o número de quase erros possa indicar diferenças mais sutis entre os grupos...

The speed of information processing refers to attainment of mental activity in a certain period of time. The aim of this study was investigate the speed of information processing in 14 years old girls, who attended public and private schools. We selected 14 girls who were in the 9th grade of elementary school or 1st year of high school. Half of them attended public school and the other half attended private school. They were evaluated by: Processing Speed Index - PSI (Coding, Symbol Search and Cancellation) of the WISC - IV and the Trail Making Test Colored Children (TTCI). The chi-square test showed a higher number of near-misses in CCTT in girls attending private school compared to girls attending public school. No difference was found between the two groups in the PSI. Although the type of school does not seem to produce significant differences between the groups in the PVI, the number of nearmisses showed a more sensitive measure to identify these differences. It is suggested that the number of near-misses may indicate subtle differences between groups...

La velocidad de procesamiento de información se refiere a la realización de actividad mental en un determinado período de tiempo. El objetivo de este estudio fue investigar la velocidad de procesamiento de información en adolescentes de 14 años que asisten a escuelas públicas y privadas. Fueron seleccionado 14 adolescentes, de sexo femenino que curzaban 9 º o 10º grado. La mitad asistia a la escuela pública y la otra mitad a la escuela privada. Fueron evaluadas utilizando las siguientes pruebas: IVP (Código, búsqueda y cancelación de símbolos) de la bacteria WISC-IV y test infantil de sequencias coloreadas (TISC). El t-test mostro un mayor número de casi errores en TISC en las niñas que asisten a las escuelas privadas. No se encontraron diferencias entre los dos grupos en las otro pruebas. Se sugiere que la medición de la cantidad de casi errores revelan una mayor sensibilidad en TTCI...