The preconditioning effect of different exercise training modes on middle cerebral artery occlusion induced-behavioral deficit in senescent rats

Introduction

Brain abilities decrease after brain stroke in elderly. The neuroprotective effect of exercise training has been proved in clinical trials and animal experiment. Nevertheless, it is not still clear what kind of exercise has greater protective effect. The present study aimed at investigating pre-conditioning effect of endurance, resistance, and concurrent training on learning ability, anxiety, and spatial memory in aged rats following stroke strength with middle cerebral artery occlusion.

Method

We used 50 male Wistar rats (age = 24 months) that were assigned randomly in five groups; 1: sham group, 2: Control group 3: Endurance training 4: Resistance training, and 5: concurrent training. The exercise training groups received training for four weeks. Following training, middle cerebral artery occlusion was applied to induce cerebral ischemia. Using the elevated plus maze, shuttle box test, and Morris water maze, neurocognitive functions were tested in the sample rats.

Results

It was found that resistance training did not affect spatial memory in the acquisition phase, while concurrent training and endurance training enhanced spatial memory in the acquisition phase. On the contrary, spatial memory was improved by resistance training in the retention phase, while concurrent and endurance exercises did not affect spatial memory in the retention phase. Passive avoidance learning ability at acquisition phase was more in resistance group compared to the endurance and concurrent training in shuttle box test, but in retention phase was similar between training groups. Unlike endurance and concurrent training, resistance training reduced anxiety in senescent rats.

Conclusion

All three exercise types alleviated aversive learning and memory impairment induced by stroke in senescent rats. Notably, the resistance training showed a greater protective effect compared to the other two training methods.

Does the Frontal Brain Electrical Activity Mediate the Effect of Home Executive Function Environment and Screen Time on Children's Executive Function?

Executive functions play an important role in various developmental aspects of children; however, environmental factors influencing individual differences in children's executive function and their neural substructures, particularly in middle childhood, are rarely investigated. Therefore, the current study aimed to investigate the relationship between the home executive function environment (HEFE) and screen time with the executive function of children aged 8-12 years by employing the mediating variables of alpha, beta, and theta waves. The parents of 133 normal children completed Barkley Deficits in Executive Functioning, HEFE, and Screen Time Scales. Alpha, beta, and theta brain waves were also measured. Data were examined using correlational and path analysis. The results suggested a positive and significant relationship between home executive functions and the executive functions of children. Furthermore, the results indicated an inverse and significant relationship between screen time and executive function. The results also proved the mediating role of alpha, beta, and theta brain waves in the relationship between screen time and the children's executive function. Environmental factors (such as home environment and screen time) affect the function of brain waves and, thus, the daily executive function of children.

COVID-19 Anxiety in Children and Its Relationship with Self-Related Skills of Executive Functions

Objective: Some children experience a significant deal of anxiety during the outbreak of COVID-19. Behavioral dimensions of the executive function appear to link to situational anxiety experience. Therefore, the primary aim of the present study is to investigate the relationship between self-related skills of executive functions and the level of anxiety in children (8-12-years-old) during the outbreak of COVID-19. Also, the secondary goal of this study is to predict the level of anxiety based on self-related skills of executive functions. Method: Parents of 300 children filled out the Barkley Deficits in Executive Functioning Scale (BDEFS) and the COVID19 anxiety scale. Data were analyzed using correlation and path analysis. A significance level of less than 0.05 was set for all tests. Data were analyzed using SPSS 22 software. Results: Results demonstrated that self-related skills of executive functions can predict 28% of COVID-19 anxiety. The subscales of self-management (P < 0.015, t = 5.56), self-regulation (P < 0.011, t = 6.37), self-restraint (P < 0.035, t = 4.29) and emotional self-organization (P < 0.042, P = 0.222) predicted coronavirus anxiety, but self-motivation (P < 0.05, P = 0.894) did not. Conclusion: Given that most subscales of executive function predict anxiety tied to critical situations such as the prevalence of the corona virus, it seems that greater attention should be allocated to the fostering and development of children's executive functions by teaching such skills at home by families.

Comparing the Effect of Risperidone, Virtual Reality and Risperidone on Social Skills, and Behavioral Problems in Children with Autism: A Follow-up Randomized Clinical Trial

BACKGROUND

Improving behavioral and social problems in children with autism requires extensive training programs even with parents at home. The main goal of this study is to design a virtual reality (VR) intervention based on the TEACCH method in combination with risperidone to evaluate its effectiveness on social and behavioral problems.

METHODS

Forty-three children with autism (6-12 years old) randomly were divided into three groups: risperidone (n = 15), risperidone + VR (n = 15), and control (n = 13). The interventions lasted for 3 months (90 sessions) and post-test assessments were done immediately after intervention. Follow up tests were done 3 months after that.

RESULTS

Risperidone + VR group showed significant differences in social skills (MD = 36.59; 95% CI: 30.74 to 38.42, P < 0.001, ŋ2 = 1.51 in post-test; MD = 19.63; 95% CI: 17.27 to 21.63, P < 0.001, ŋ2 = 0.86 in follow up); and behavioral symptoms (MD = -36.12 ; 95% CI: -39.72 to -36.91, P < 0.001, ŋ2 = 1.99 in post-test; MD = -28.82 ; 95% CI: -29.43 to -25.32, P < 0.001, ŋ2 = 1.58 in follow up) compared to the control group. However, the risperidone group showed significant differences in social skills (MD = 2.03; 95% CI: 0.82 to 3.67, P < 0.001, ŋ2 = 0.12) and behavioral symptoms (MD = -36.66; 95% CI: -38.96 to -34.27, P < 0.001, ŋ2 = 1.96) only in post-test. Thus, the experimental groups did not have any significant difference in post-test.

CONCLUSION

Combined interventions such as VR can enhance the effectiveness of risperidone response and boost children's preparedness to practice and learn social interaction.

The Effect of Perceptual-Motor Training on Executive Functions in Children with Non-Verbal Learning Disorder

PURPOSE

Research shows an atypical cognitive process in children with nonverbal learning disorder (NLD) compared to typically developing children, but a wealth of information indicates that physical activity can influence cognitive processes. However, little is known about the effects of perceptual-motor training and its impact on the cognitive process of children with NLD. Thus, the major goals of this study are to compare the executive functions (EFs) in children with NLD with typically developing children and then to investigate the effect of perceptual-motor training on EFs of children with NLD.

METHODS

To achieve the first goal, 400 typically developing (IQ >80) and NLD children (7-13 years old) were randomly selected in the city of Mashhad, Iran, during the period 2017-2018. As for the second goal, 50 children with NLD were randomly assigned to an experimental or control group. To evaluate executive functions, Delis-Kaplan executive function system test was used at the pretest, posttest, and 3-month follow-up. The experimental group received the Werner and Reini's perceptual-motor training program in sixteen 45-min sessions (three sessions per week), but the control group did not receive any intervention.

RESULTS

The results showed that children with NLD were significantly weaker than typically developing children in London Tower Test (t (38) = -4.662, p <0.01), Trail Making Test (t (33.926) = -3.11, p <0.01), Card Sorting Test (t (38) = -3.427, p <0.01), and Stroop Color Test (t (30.035) = -5.876, p <0.01). The Pilates training had an obvious effect on enhancing the performance of participants in the experimental group (p<0.001), but similar results were not observed in the control group.

CONCLUSION

Children with NLD have problems in EFs, but perceptual-motor training can be used as an effective intervention for these children.