TDCS

This study aimed at determining the effect of cathodal Transcranial Direct-Current Stimulation (c-tDCS) of Dorsolateral Prefrontal Cortex (DLPFC) on learning simple volleyball serves. This semi-experimental study was performed as pre-test and post-test with a control group. Thirty male volleyball players with an average age of 14±0.50 years were selected through purposeful sampling based on inclusion and exclusion criteria. The participants were randomly assigned to experimental (n=15) and control (n=15) groups. During eight consecutive sessions, the left DLPFC of participants was stimulated for 10 min using sham and real c-tDCS of 1.5 mA before each session. The participants then performed 35 simple volleyball serves. Absolute error and total variability of participants' performance in pre-test, in the first, third and eighth sessions were recorded. Data analysis by repeated-measures showed that there was a significant difference between absolute error (F=14.597, P = 0.001) and total variability (F=17.523, P = 0.001) of experimental and control group performance. ANCOVA showed that absolute error and total variability of the experimental group performance was respectively (P = 0.013 and P = 0.018) in the first session, (P = 0.021 and P = 0.007) in the third session and (P = 0.001 and P = 0.001) in the eighth session, which were significantly higher than that in the control group. Thus, it seems that c-tDCS of DLPFC is associated with reduced declarative memory activity in the cognitive stage leading to a negative impact on serve learning in beginner volleyball learners.

The purpose of this study was to determine the effectiveness of direct electrical stimulation from the skull on depression symptoms in men suffering from post-traumatic stress disorder in war. The research design was a semi-experimental design with repeated tests. The sample included 15 patients with post-traumatic stress disorder men who were admitted to the Delaram Psychiatric Hospital and were voluntarily and voluntarily selected. The instrument used in this study was Beck's 21-item depression questionnaire. Subjects were first subjected to pretest and then subjects received 12 sessions of electrical stimulation therapy (TDCS). After receiving each 4 sessions of treatment, subjects were assessed once by a depression questionnaire. The results showed that the difference in mean scores of subjects in different levels of application of independent variable was significant (P <0.001). The symptoms of depression in subjects with repeated actions of electrical stimulation from the skull have decreased relative to the pre-test.

The aim of this study was to compare the effectiveness of two methods of cup stacking game and transcranial electrical stimulation of the brain (tDCS) on cognitive inhibition, auditory attention and visual attention in students with attention deficit syndrome in 2019-2020. The present study was a quasi-experimental study with a pretest-posttest design and a control group. The present study population consists of all fifth and sixth grade elementary students with symptoms of attention deficit in Tehran in 2019-2020. Among the fifth and sixth grade students, 45 students with attention deficit symptoms were selected by convenience sampling and randomly assigned to three groups of 15 people including the brain stimulation group, the cup stacking game group and the control group. The tDCS experimental group was treated for 10 sessions of 30 minutes, and the cup stacking experimental group were exposed to ten 30-minute sessions of cup stacking game. In order to evaluate the research variables, the continuous auditory visual function test (IVA) of Rosvold, Sarason, Bransome, and Beck (1956) was used. The results of mixed analysis of variance showed that cup stacking game and tDCS are both effective in improving cognitive inhibition and auditory attention of students with attention deficit syndrome, but there is no significant difference between the two methods in influencing cognitive inhibition and auditory attention (P> 0.05). Also, only the cup stacking game had a significant effect on improving visual attention, but tDCS did not have a significant effect on improving visual attention.

Introduction: Painful diabetic neuropathy is a major complication of chronic diabetes with a significant negative impact on the quality of sleep and quality of life in diabetic patients. This study was conducted to determine the single and combined effect of primary motor cortex (M1) and left Dorso lateral prefrontal cortex (L- DLPFC/ F3) anodic transcranial direct current stimulation (tDCS) in improving sleep quality and quality of life in type 2 diabetes patients with neuropathic pain. Method: The current study was a four-group double-blind randomized clinical trial. The statistical population consisted of all patients with type 2 diabetes aged 45 to 65 years, who were members of the Bonab Diabetes Association in 2022 and identified as having neuropathic pain by specialists. The research sample was 48 people selected through the purposeful sampling method and randomly assigned into three experimental groups and one sham control group. Patients in four groups received their respective interventions for 12 sessions, three times a week. The data collection was done using the Pittsburgh Sleep Quality Index (PSQI) and the 36-Item Short Form quality of life questionnaire (SF-36). Results: According to the findings, only the stimulation of M1 and F3 areas was effective in improving the sleep quality of diabetic patients. In terms of increasing quality of life, the effect of combined treatment (stimulation of both M1 and F3 areas) was significantly higher than the F3 area stimulation and sham stimulation groups. Also, the observed effect remained stable until the 3-month follow-up stage. Conclusion: According to the results of this research, neuropsychological rehabilitation through electrical stimulation of the M1 and F3 areas of the brain was supported to improve the sleep quality and the quality of life of diabetic neuropathy patients.