Neuropsychology
Foad Niknasab; Fazlollah Bagherzadeh; Mahmoud Sheikh; Ali Moghadamzadeh; Davoud Hominian
Abstract
Children with developmental coordination disorder (DCD) display slowness, inaccuracy, and insufficient coordination in the performance of motor skills. Compared to children with normal development, they generally have poorer performance in tasks that require visual-motor integration. We evaluated the ...
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Children with developmental coordination disorder (DCD) display slowness, inaccuracy, and insufficient coordination in the performance of motor skills. Compared to children with normal development, they generally have poorer performance in tasks that require visual-motor integration. We evaluated the effect of tDCS stimulation on visual-motor integration in children with DCD. In this quasi-experimental study, featuring a pre-test-post-test design, 40 students with DCD aged 7-10 years were selected according to the inclusion criteria and randomly assigned into two groups: tDCS stimulation and artificial stimulation. In the pre-test, participants took a visual-motor integration test. The intervention phase was administered for 5 consecutive days. Each day, the subjects underwent either electrical stimulation in the motor cortex (anode at C3 and cathode at Fp2) or artificial stimulation. The post-test was administered in the last session. Short-term and long-term follow-ups were performed 1 day and 42 days after the post-test, respectively. Repeated measures ANOVA was used to analyze the data. The results showed that electrical stimulation of the motor cortex significantly improves the visual-motor integration of children with DCD. The follow-up results supported the persistence of motor-visual integration in these children. In general, the results emphasized the effectiveness of tDCS exercises on motor-visual integration in children with DCD.
milad amini masouleh; Gholamreza Chalabianloo; reza abdi
Abstract
Introduction: Working memory deficit is one of the most common complaints in post-stroke patients. The present study aimed to investigate the efficacy of the con-commitment use of unihemispheric concurrent dual-site a-tDCS (a-tDCSUHCDS), computer-assisted cognitive rehabilitation and conventional (Single ...
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Introduction: Working memory deficit is one of the most common complaints in post-stroke patients. The present study aimed to investigate the efficacy of the con-commitment use of unihemispheric concurrent dual-site a-tDCS (a-tDCSUHCDS), computer-assisted cognitive rehabilitation and conventional (Single site) a-tDCS in comparison with computer-assisted cognitive rehabilitation without tDCS on the working memory in stroke patients. Method:32 participants (21 males and11 females; age range 40-65years) with subacute stroke were selected by purposeful sampling method & randomly assigned to three experimental conditions and a controlled group with sham stimulation. All groups completed sessions of the Dual N-back training task. A-tDCSUHCDS group received anodal tDCS over the left DLPFC and M1 and conventional (Single site) a-tDCS group received anodal tDCS over the left DLPFC. Result: A repeated measures analysis of variance revealed that the a-tDCSUHCDS group had the larger improvement in working memory tasks after the intervention. Also, at the 8-weeks follow-up, the a-tDCSUHCDS group still had larger improvements in mentioned tasks. Conclusion: These results indicated that there may be potential for the concomitant use of a-tDCSUHCDS and computer-assisted cognitive rehabilitation by increasing the excitability of the cortical network of brain regions that play an important role in executive functions, to enhance the efficiency of the cognitive rehabilitation programs of the stroke patients.
ladan vaghef; hasan bafandeh gharamaleki; fatemeh soltani margani
Abstract
Aim:The impairment in Cognitive functions is common symptoms of Depression. The purpose of this research is investigation of the effect of transcranial direct current stimulation (tDCS) on risky Decision-Making and reaction times (RT) in patients with Depression. Methods: Thirty university students with ...
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Aim:The impairment in Cognitive functions is common symptoms of Depression. The purpose of this research is investigation of the effect of transcranial direct current stimulation (tDCS) on risky Decision-Making and reaction times (RT) in patients with Depression. Methods: Thirty university students with depressive symptoms who were referred to the Counseling Center of Azarbaijan Shahid Madani University were selected and randomly divided into two groups : experimental and control groups (n=15 per group). The experimental group received anodal-tDCS stimulation over the left DLPFC for two weeks, 5 days a week and each session for 20 minutes. Risky decision making and reaction time were assessed by Balloon Analogue Risk Task (BART) and reaction timer apparatus, respectively. The obtained data were analyzed using covariance analysis and paired t-test. Findings: The Results showed that the reaction times of both hands and feet was significantly faster in experimental group than sham group (p <0.05). Moreover, adjusted mean number of pumps (AMP) was lower in the experimental group than in the control group, during the BART task. Conclusion: according to our result, anodal tDCS stimulation reduced reaction time and decreased risk-taking behaviors.Therefore,transcranial electrical stimulation can be usedas a non-pharmacological and safe intervention to improve cognitive impairment to enhance the cognitive functions in people with depression.
Mohammad sadegh Rajaie pour; Mohsen Saeidmanesh
Volume 4, Issue 13 , August 2018, , Pages 67-84
Abstract
Aim: The purpose of this study was to determine the effect of electrical stimulation of the brain from the skull on the memory of students with special learning disorder. Method: The present study was a semi-experimental pre-test-post-test with control group. To this end, the sample was selected through ...
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Aim: The purpose of this study was to determine the effect of electrical stimulation of the brain from the skull on the memory of students with special learning disorder. Method: The present study was a semi-experimental pre-test-post-test with control group. To this end, the sample was selected through a sampling method from among students with learning disabilities who were eligible to participate in the study. Twenty people were selected and randomly divided into two experimental and control groups. The geometric image analysis of Andre-Ray (1942) was used to measure memory variables in the form of pre-test and post-test. The F3, F4 students in the experimental group were brainwashed in 10 sessions, while the control group students were only stimulated by the same conditions. The protocol in this study was a two-way stimulation of the left and right DLPFC area, which was performed in 2 15-minute intervals. Findings: In order to test the research hypothesis, in other words, generalization of the results of the sample to the statistical population of the study, one-way covariance analysis (ANCOVA) was used. Conclusion: The results showed that there was a significant difference between the two experimental and control groups in memory improvement (P <0.05 and F = 29.66). From the results, it can be concluded that the electrical stimulation of the brain from the tDCS skull is effective on the memory performance of students with special learning disabilities.
MOHAMMAD ORAKI; REZA FARAJI; hosein zare; vahid nejat
Volume 3, Issue 11 , March 2018, , Pages 103-114
Abstract
Introduction:The purpose of the present research was to study the effectiveness of Transcranial Direct Current Stimulation (TSCS) on executive functions of war survivors who suffer from PTSD. methods: It was a semi-experimental research with pre-test, post-test, experimental research and sham/placebo. ...
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Introduction:The purpose of the present research was to study the effectiveness of Transcranial Direct Current Stimulation (TSCS) on executive functions of war survivors who suffer from PTSD. methods: It was a semi-experimental research with pre-test, post-test, experimental research and sham/placebo. The population of the research includes all injured people (wounded warriors) of Kermanshah and they were selected by purposeful sampling (available sampling) as 30 individuals (15 per group). In order to obtain data, Barkley psychological executive functions disorder scale (BDEFS) and Wooders et al. Traumatic Stress Disorder List (1994) was used and data were analyzed by Multivariate covariance analysis method. Findings:The results showed that there is significant difference between mean score of time self-management, self-motivation, emotional self-regulation and total score of executive functions after omitting the effect of pre-test in experimental and control group (P0.05). in other word, it can be said that Transcranial Direct Current Stimulation (TSCS) had no effect and made no significant difference in self-organization/problem-solving and self-control/inhibition. Conclusion: According to findings and promotion of executive functions in wounded warriors who suffer from PTSD, it is needed to use some treatments such as Transcranial Direct Current Stimulation (TSCS) regularly.
leila bayat mokhtari; Alireza Aghayousefi; Hossein Zare; Vahid Nejati
Volume 3, Issue 8 , June 2017, , Pages 51-68
Abstract
Introduction: This survey was done in order to consider the impact of transcranial direct current stimulation on the visual/spatial working memory in the area of dorsolateral prefrontal cortex. Methods: This survey plan was experimental in the kind of pretest/after test together placebo group and arbitrary ...
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Introduction: This survey was done in order to consider the impact of transcranial direct current stimulation on the visual/spatial working memory in the area of dorsolateral prefrontal cortex. Methods: This survey plan was experimental in the kind of pretest/after test together placebo group and arbitrary selection. The study sample contains 20 boy students with dyslexia with 8 to 10 years old that have inclusion criteria in this study. Two kinds of anode and sham stimulation, with 1.5 mA circuitry for 20 minutes and 15 minutes phonological awareness training on 20 participants in 10 sessions were presented. The participants before and after stimulation with N- Beck task, Shirazi and Nilipour reading test were tested. Findings: The covariance results showed that anode stimulation has a significant impact on improving performance in the visual/spatial aspect of the working memory compared to the sham stimulation. Conclusion: Overall, this study showed that the anode stimulation increased and improved individual performance on tasks involving visual working memory and has led to improved dyslexia in children.
