Alireza Saberi Kakhki

Ferdowsi University Of Mashhad | FUM · Department of Motor Behavior

Study aim : The purpose of this study was to investigate the impact of speed-based strategy instruction on motor sequence learning and transfer. Material and methods : Male participants (n = 30, 18 to 24 years old) were assigned to one of the groups based on instruction. Motor sequence learning was examined using the complex dynamic arm movement ta...

This study aimed to investigate the relatively explicit (errorful) or implicit (errorless) conditions on the learning the relative timing was a motor task. Healthy participants (N = 38, M age = 22.6 years, SD age = 3.2 years) were randomly assigned to one of three groups (control, errorful, errorless). We conducted the study in four phases: (1) Pre...

In this study, we aimed to explore the effects of contextual interference on motivational regulation, as measured by EEG (frontal alpha asymmetry), in older adults. Participants practiced a sequenced timing task in random, algorithmic, or blocked schedules in both similar and dissimilar task difficulty conditions, with task difficulty defined by ab...

In this study, we aimed to explore the effects of contextual interference on motivational regulation, as measured by EEG (frontal alpha asymmetry), in older adults. Participants practiced a sequenced timing task in random, algorithmic, or blocked schedules in both similar and dissimilar task difficulty conditions, with task difficulty defined by ab...

Study aim : The purpose of this study was to investigate the role of sleep and awareness on consolidation of general and Sequence-Specific learning in children. Material and methods : Male participants (n = 48, 10 to 12 years old) were assigned to one of four groups based on awareness and sleep. Acquisition phase took place in the morning (wake gro...

This study was aimed to compare the effect of two methods of variability (contextual interference and differential learning) on the learning in golf putting. For this purpose, 50 female students (mean age 21.6 ± 1.7) were randomly divided into five groups, including blocked contextual interference (BCI), random contextual interference (RCI), blocke...

According to the challenge point framework, task difficulty has to be appropriate to learner skill level. The pure blocked or random practice controls the task difficulty during practice monotonically. Therefore, the purpose of this study was to investigate the effect of algorithm-based practice schedule and task similarity on motor learning in old...

Background. The No Return Point hypothesis is one of the research areas that has been done in line with the motor program. In this hypothesis emphasized an inability to inhibition move after its start by the motor program. Several factors are affecting the mechanism of this inhibition. Objectives. In this study, we investigate the effects of audio...

Purpose: Children with Down syndrome (DS) have multiple difficulties in gait pattern. So, the effect of the activity level and speed on the gait coordination and variability was investigated. Methods: In this case-control observational study, 24 participants in three groups of active and non-active children with DS, and the control group without in...

Acquisition of sport skill might be considered as a nonlinear process that emphasizes on momentary changes and dynamic coordination, and according to ecological viewpoint, learning is gained via interaction of individual with an environment and the task. Accordingly, the purpose of this research was to study the effect of nonlinear pedagogy on perf...

Background and Aim: One of the most common problems in the stroke patients is reduction of balance and control of the posture and functional mobility disorders. Therefore, the purpose of this study was the effect of the selected physical and mental and combined exercises on balance of the stroke patients by focusing on change in the sensory inputs....

Learning of sport skills is a complex process which is influenced by the individual differences. The purpose of the current research was to compare the Linear pedagogy and the Nonlinear pedagogy on the performance and learning of table tennis forehand stroke. This was a semi-experimental study that was carried out on 22 girls (9-11year). Random two...

The purpose of this study was to investigate the neural mechanisms of the contextual interference effect (CIE) and parameter similarity on motor learning in older adults. Sixty older adults (mean age, 67.68 ± 3.95 years) were randomly assigned to one of six experimental groups: blocked-similar, algorithm-similar, random-similar, blocked-dissimilar,...

Purpose The aim of this study is to assess the effect of aerobic exercise on the three categories of somatic, affective and cognitive symptoms of depression, and to evaluate the mediating role of quality of life (QOL) domains on this effectiveness. Methods Thirty-one female outpatients suffering from major depressive disorder aged 20-50 years were...

Among the main deficits in children with developmental coordination disorder (DCD), the underdeveloped balance is important because of the impact on motor skills development, the falling risks and participation in various physical activities. Objective: The purpose of this study was to examine the effect of task-specific balance training in dual-ta...

The simulation theory argues that physical execution, action observation, and imagery share similar underlying mechanisms. Accordingly, applying a high-level psychological variable (variability of practice) should have a similar effect on all three modes. To test this theory, a total of 90 right-handed students participated in this study and were r...

Purpose: Investigation of autism spectrum disorder (ASD) is somewhat dependent on addressing main core features of ASD. But it is not clear which kind of investigation can effect on more difficulties features. So, this study examines the effect of the visuomotor, motor, and computer-based training programs on social behavior, motor skills, and rep...

observational and physical practice, movement sequences, coordinate system, constraints-led approach, absolute and relative timing Some studies have shown that different coordinate systems in the coding of movement sequences develop during observational and physical practice. According to Newell's (1986) constraints-led approach, such contradiction...

This study examined the effect of a motor intervention based on the attention, balance, and coordination (ABC) learning approach on motor proficiency and executive functions in children with learning disabilities (LD). Forty-five male elementary school students with LD aged 7-9 years were recruited and randomly assigned into one of three groups: tw...

Depending on the difficulty of the task in terms of movement duration and the number of elements forming the sequence, recent research has shown that movement sequences are coded in visual-spatial coordinates or motor coordinates. An interesting question that arises is how a specific manner of performance without a change in such functional difficu...

Introduction: The aim of this study was to determine the effect of explicit and implicit training arrangements on acquisition and learning of motor skills in children with cerebral palsy spastic hemiplegia. Method: From nearly 2500 students with cerebral palsy in special cases schools (Disabled children) in Tehran, 40 right-handed patients with sym...

Two processes are suggested for intervention in the learning of motor skills. These include explicit process in which the performer consciously knows the acquisition of the skill and the other one is an implicit process in which the performer has no conscious knowledge of acquiring the skill. The purpose of this study was to investigate the effect...

Weakness in the performance of gross motor skills is one of the main problems of children with developmental coordination disorder (DCD). Because of the prevalence of the disorder among children and the important role of physical education (PE) class to orient the sports education process in school, this study carried out for observing the effect o...

Introduction: Elderly is a period of alterations in human life that is accompanied by impairments in sensorimotor and cognitive functioning, including working memory especially in the bimanual coordination task. Therefore, the purpose of the current study was to investigate the effect of the errorless, errorful, and random practice schedules on per...

Introduction: Several investigations on the mechanism of motor control and learning leads to multiple theories in this field. The purpose of this study was to examine these theories and integrate them into a conceptual model for a better understanding of motor control and learning. Conclusion: A series of motor control studies have demonstrated tha...

This study aimed to compare the effect of two neurofeedback protocols with two different mechanisms on learning a motor task. Forty-two volunteers aged 18–22 years old were placed in three groups of pre-training, post-training, and control. In the pre-training group, Mu (8–12 Hz) amplitude was suppressed at C4 before the motor skill training, while...

Motor skill learning is one of the main problems of children with developmental coordination disorder (DCD). Since the prevalence of this disorder among children is considerable, thus this study carried out for determine the frequency of feedback about knowledge of result (KR) on throwing skill’s motor learning in children with DCD. Methods: This s...

Background and Study Aim: Especial advantage known as especial skills have come to mind specificity perspective in human motor control. The main objective was to explore the relative timing of throwing kinematics data in experienced daters so that it would provide examine specificity perspective. Material and Methods: Seven experienced players exec...

ABSTRACT *Corresponding Author: Alireza Saberi Kakhki E-mail: askakhki@um.ac.ir Key words: 1. Brain 2. Learning 3. Role Introduction: Transcranial Direct Current Stimulation (tDCS) can improve or impair the function of the brain. This has turned tDCS into a tool that can be used for evaluation of hemispheric specialization in motor programming a...

Nowadays, education systems are led by the two-way teacher-student graph. Thanks to students' participation in the act of teaching, a teacher can easily select the appropriate method or methods of teaching in accordance with his/her students' ability, the topic of the lesson, educational goals and contextual conditions. Therefore, all communities n...

The present study examined how motor skill acquisition affects electroencephalography patterns and compared short- and long-term electroencephalography variations. For this purpose, 17 volunteers with no history of disease, aged 18 to 22 years, attended seven training sessions every other day to practice a pursuit tracking motor skill. Electroencep...

Objectives: Considering the growing need for using a variety of new nonpharmacological methods in treating depression, this quasi experimental study was conducted to investigate the effect of aerobic indoor exercise in a gym compared with green exercise in an outdoor green environment of an urban park on triple categories of affective, cognitive an...

The purpose of this study was to investigate changes in mental representation from either random or blocked practice when engaged in golf putting. Thirty participants were randomly assigned to random practice, blocked practice, and a no-practice groups. First, we measured novice golfers' initial mental representation levels and required them to per...

Transcranial Direct Current Simulation (tDCS) can improve or disrupt brain functions and can therefore be used to investigate hemispheric specialization. Accordingly, this study was designed to research hemispheric specialization in the control of final position accuracy by comparing the effects of tDCS on dorsolateral prefrontal cortex (DLPFC) in...

Objectives: Considering the growing need for encouraging greater use of a variety of non-pharmacological methods in treating depression, the aim of this quasi experimental study was to examine the effect of aerobic exercise on triple categories of affective, cognitive and somatic symptoms of depression and to investigate its psychological mediators...

Background and Purpose: Studies have unanimously supported that left-hemisphere specialization is greater than the right hemisphere for representation of learned actions and motor learning, but it is not clear as to whether there is a particular specialization related to motor programming. This study investigated the issue by comparing the effect o...

Introduction. Balance is one of the main problems of children with developmental coordination disorder (DCD). According to process-oriented approach, besides strength training, neuromuscular adaptations can improve balance. Objective. To evaluate the effects of strength training on improving static and dynamic balance in DCD children. Methods and p...

Introduction: Brain-derived neurotrophic factors (BDNF) play a role on induction and maintenance of memory and learning. The BDNF gene Val66Met polymorphism impairs expression of this protein. Due to difference between the neural principles operating during motor memory consolidation and the neural principles operating during practice (acquisition)...

Introduction: Balance is one of the main problems of children with developmental coordination disorder (DCD). According to process-oriented approach, besides strength training, neuromuscular adaptations can improve balance. Objective: To evaluate the effects of strength training on improving static and dynamic balance in DCD children. Methods and...

Impulsivity as a symptom cuts across a number of psychiatric disorders and results have shown that it as an antipode of certain components of executive functions and consistently associated with lower grades and academic achievement. The objective of this study was to explore the effects of physical activity on impulse control, attention, decision-...

The present study aimed to compare the effects of two types of neurofeedback protocols (alpha enhancement & alpha suppression) on the motor skill acquisition. 42 volunteers participated in the present study. The subjects were divided into three groups of 'alpha enhancement', 'alpha suppression' and 'control'. In the alpha suppression group, the obj...

Objectives: The study of spatial-temporal parameters and their changes in walking with dual tasks, symmetry in right and left legs functions as well as changes in these parameters have received scant attention from researchers. Therefore, the purpose of this study was to evaluate the changes in spatial-temporal parameters of walking due to their si...

Background: Brain-derived neurotrophic factor (BDNF), is a protein that plays an important role in neuroprotection, neurogenesis and synaptic plasticity, by which it plays an important role in motor learning. The presence of val66met single nucleotide polymorphism in one area of the BDNF gene Leads to disruption in the expression of this protein. T...

Motor learning might be affected by environmental factors as well as some genetic factors. The aim of the present study is to examine the effect of val66met BDNF polymorphism on motor learning and to examine the possibility of moderating this effect using environmental factors. One hundred students from University of Kashan, Iran participated in th...

Objective: The purpose of this study was to compare the effect of two different approaches of dual-task training and executive training on pattern of gait in older adults with balance impairment. Methods: Thirty older adults with the mean age of 73.8 participated in the study. They scored 52 or less on the Berg Balance Scale (BBS), and walked wi...