Mohammad Ali Sanjari

Mohammad Ali Sanjari
Iran University of Medical Sciences

PhD

About

97
Publications
17,577
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987
Citations
Additional affiliations
February 2004 - present
Iran University of Medical Sciences
Position
  • Faculty Member

Publications

Publications (97)
Article
Muscles of the lumbar spine play an important role in controlling segmental intervertebral motion. This study aimed to evaluate the association between lumbar intervertebral motion and changes in lumbar morphology/composition in people with chronic low back pain (CLBP). A sample of 183 patients with CLBP participated in this cross‐sectional study....
Article
Background: Knee extension torque control decreases after anterior cruciate ligament (ACL) rupture. There is a controversy in neuromuscular control changes on the uninvolved side. We intended to evaluate the steadiness and accuracy of quadriceps muscle control in the healthy and deficient sides of people with acute ACL rupture. Methods: In this cro...
Article
Background: The prevalent method for investigating the effect of therapeutic interventions on walking in the individuals with chronic low back pain (CLBP) is component-level approach in which all measurements focus on the spine component alone. However, this approach cannot disclose information about the overall function of the movement system suc...
Article
Background Investigating the complexity of movement systems can be insightful in clinical decision making. The study conducted to evaluate whether complexity of ground reaction force is affected by hallux valgus grades and footwear or foot side conditions. Methods A sample of 120 females including 30 participants in each group of healthy and mild,...
Article
Background People with knee osteoarthritis are at higher risk of postural deficits and locomotor adaptations which could be manifested in transient tasks like gait initiation. To better understand the effect of early knee osteoarthritis on gait initiation, we measured the gait initiation in two groups of early knee osteoarthritis and healthy age-ma...
Article
Objective This study aimed to employ nonlinear dynamic approaches to assess trunk dynamic stability with speed, symmetry, and load during repetitive flexion-extension (FE) movements for individuals with and without nonspecific low back pain (NSLBP). Background Repetitive trunk FE movement is a typical work-related LBP risk factor contingent on spe...
Article
The aim of this study was to compare the fatigue effect on the viscoelastic behavior of the musculoskeletal system between the two sexes in a landing task. Stiffness and shock absorption capacity were studied from ground reaction force data using a mass-spring-damper model. A parametric simulation was also performed to demonstrate the effect of dif...
Article
Background Little attention has been paid to foot structural factors and ground reaction force in hallux valgus. Whereas, investigating the structural factors in detail and determining their biomechanical effects can help to better manage hallux valgus. Methods In this case-control study, 120 females (90 hallux valgus and 30 healthy) were recruite...
Article
Full-text available
This study investigated the effect of audiovisual integration on action-perception transfer.40 subjects were randomly divided four groups: visual, visual-auditory, control visual and control visual-auditory. Visual groups watched pattern skilled basketball player and other groups in addition to watching pattern skilled basketball player, heard Elbo...
Article
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Background: Lateral wedge insole (LWI) aims to reduce loading on medial compartment of tibiofemoral joint in mild knee osteoarthritis (KOA). This effect may be augmented by concomitant use of subtalar strap to fix the ankle joint. Moreover, longitudinal arch support embedded in insoles can cause foot comfort and may be beneficial for people with KO...
Preprint
Background Hand carpet weaving requires prolonged static and repetitive tasks in a stationary and constrained postures, thus there is a high prevalence of muscle pain and fatigue and musculoskeletal disorders among carpet weavers. Methods This study aimed to determining the muscle fatigue in carpet weaving tasks by Joint Analysis of Spectral and am...
Article
Full-text available
Background: Urinary incontinence (UI) is more common than any other chronic disease. Stress urinary incontinence (SUI), among the various forms of urinary incontinence, is the most prevalent (50%) type of this condition. Female urinary continence is maintained through an integrated function of pelvic floor muscles (PFMs), fascial structures, nerves...
Article
Background: There is a lack of evidence in reliability of the modified sphygmomanometer to measure the brace-interface pad pressure in adolescents with Scheuermann’s kyphosis (SK). Objectives: To evaluate the intra- and inter-observer reliability of modified sphygmomanometer for measuring interface pad pressure in the Milwaukee brace. Methods: Two...
Article
The present study investigated the effects of physiological arousal and cognitive anxiety on performance accuracy and kinematic features of gun in expert and novice groups. The physiological arousal was recorded with skin conductance response. Performance accuracy and kinematic features of gun such as total movement time, peak velocity, displacemen...
Article
Full-text available
Background: Knee osteoarthritis (KOA) is associated with a decrease in function, increase in pain and risk of falls. Lateral wedge insole (LWI) is commonly prescribed in KOA to improve pain and function. Our study aimed to 1) evaluate the clinical symptoms and risk of falls in early KOA and compare with controls; 2) evaluate the immediate and four-...
Article
Objective: The aim of this study was to examine the effect of Mulligan ankle taping on center of pressure (COP) parameters during performance of a functional upper limb task in patients with chronic ankle instability (CAI). Methods: A clinical controlled trial study designed between 4 ankle conditions: untapped and taped, CAI and healthy subject...
Article
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BACKGROUND: The present study examined the interaction of external-internal and relevant-irrelevant attentional focus on accuracy of basketball free throws. The potential mediating role of visual information in skilled basketball throwers was also examined. METHODS: Eleven male skilled players (mean age 21.45±2.50 years) were recruited. The partici...
Article
Full-text available
It has been shown the auditory channel associated with the task, transmits relevant information whit movement and it can influence positively on perception and motor outcome athlete. But the combination of auditory patterns (Sonification) with common visual patterns in order to develop movement patterns, is still controversial field of study. Twent...
Article
Full-text available
BACKGROUND: The present study examined the interaction of external-internal and relevant-irrelevant attentional focus on accuracy of basketball free throws. The potential mediating role of visual information in skilled basketball throwers was also examined. METHODS: Eleven male skilled players (mean age 21.45±2.50 years) were recruited. The partici...
Article
Background: Sit-to-stand (STD) and stand-to-sit (SIT) analysis can provide information on functional independence in daily activities in patients with low back pain (LBP). However, in order for measurements to be clinically useful, data on psychometric properties should be available. Objectives: The main purpose was to investigate intra-rater re...
Article
Background context: Clinical evaluation of the spine is commonplace in musculoskeletal therapies such as physiotherapy, physical medicine/rehabilitation, osteopathic, and chiropractic clinics. Sit-to-stand (STS) is one of the most mechanically demanding of daily activities and crucial to independence. Difficulty or inability to perform STS is comm...
Article
Full-text available
Background: Chronic nonspecific low back pain (CNLBP) is among the most prevalent health problems. Lumbar spine and hips kinematics and coordination can be affected in CNLBP. The effects of exercises on the kinematics and coordination of lumbar spine and hips during sit-to-stand (STS) and its reverse have not been evaluated. Objective: The aim o...
Article
Context: Kinesio Tape (KT) is a widely used intervention in the fields of sports and rehabilitation. However, its effects on lower extremity behavior during functional activities are not entirely known. Objective: To test the hypothesis that application of KT can change performance and vertical stiffness during the countermovement jump (CMJ) bef...
Article
Full-text available
This study investigated the effect of audiovisual integration on perception and action and perception–action transfer. For this purpose, 30 subjects were selected and the subjects were randomly divided three groups: visual, visual-auditory (single channel), visual- auditory (two channels). People in the visual group, watched pattern skilled basketb...
Article
Full-text available
Background Flat foot, as one of the common foot deformities can affect gait biomechanics and risk of lower extremity injury. Fatigue, as a high load task, can also change biomechanical parameters of locomotion. Studying normal and flat footed individuals under high load tasks such as fatigue can elucidate their differences more easily. Objectives...
Article
Full-text available
Introduction: Lumbar disc herniation (LDH) is a common condition in adults and can impose a heavy burden on both the individual and society. It is defined as displacement of disc components beyond the intervertebral disc space. Various conservative treatments have been recommended for the treatment of LDH and physical therapy plays a major role in...
Article
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Background: Due to biomechanical differences, various patterns of muscle contraction are expected to occur while walking over ground versus when walking on a treadmill. Objectives: This study aimed to compare amplitude and duration of activation of selected trunk and lower extremity muscles during over-ground and treadmill walking. Materials an...
Article
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Background: The effects of exercise volume on the pattern of muscle activity is one of the most important factors in training management and injury risk reduction. In the lower limb, the quadriceps muscle which plays a determining role in performing the stance and other karate techniques could be injured in intensive exercise and may induce anteri...
Article
Full-text available
Objectives: Work-related musculoskeletal disorders in the neck and shoulder regions are common among carpet weavers. Working for prolonged hours in a static and awkward posture could result in an increased muscle activity and may lead to musculoskeletal disorders. Ergonomic workstation improvements can reduce muscle fatigue and the risk of musculo...
Article
Background: While several studies have investigated the traditional linear measures in patients with knee osteoarthritis, no study has yet reported the non-linear structure of postural sway in these patients. Methods: We used two non-linear methods, recurrence quantification analysis (percent of determinism-%DET) and central tendency measure, to...
Article
Full-text available
Abstract Introduction: Vision is not the only sense providing information to understand the pattern of movement. Hearing is another suitable channel to gather information about the pattern of movement. Hence,This study investigated the effect of audiovisual integration onperformanceprecisionand learning in basketball jump shot. Materials and Meth...
Article
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Objectives: Foot and ankle problems are common complications in rheumatoid arthritis disease. Gait pattern such as normal foot and ankle rocker is impaired in patients with rheumatoid arthritis. Rocker sole as an external shoe modification is commonly prescribed in this pathology. The aim of this study was to investigate the effect of rocker shoe o...
Article
Full-text available
A B S T R A C T Background: Patellofemoral pain (PFP) is a common affliction and complex clinical entity. Deficit in neuromotor control of the core may be a remote contributing factor to the development of PFPS. Comparative evaluation of core and extensor mechanism muscle activation patterns between healthy group and patients involved by patellofem...
Article
Full-text available
The current research done to determine the effect of sonification modeling on perception and the accuracy of performing and learning jump shot in basketball. Twenty people whom had no experience in jump shot participated voluntary in research. These people were assigned randomly as two groups named as “visual” and “audiovisual”. The people in “visu...
Article
Full-text available
Purpose: To examine the intra-rater reliability of knee movement data in sagital plane obtained from electrogoniometer (EGM) in a basic, sport-specific task of karate. Methods: A total of 23 elite karate athletes (13 females and 10 males; mean age of 16.10±1.26 yrs) participated in this study. The task was defined as performing three consecutive Z...
Article
Full-text available
Objective: The goal of this study was quantitative analysis of elbow range of motion (ROM) variability due to musculo skeletal fatigue. Materials & Methods: Ten intact subjects using nonrandomized sampling were evaluated. Each subject performed four fatiguing tasks in two repetition rates using two weights that were 10 and 20 percent of their dyna...
Article
Background and Aim: Foot orthoses are widely prescribed to treat a range of lower extremity problems. Long-term biomechanical effects of foot orthosesare not clearly documented in the literature. The aim of this study was to examine long-term effects of foot orthoses on leg muscles activity in individuals with pesplanus during walking. Materials an...
Conference Paper
Full-text available
This paper describes a new device for human balance exercise and evaluation in frontal plane. The device includes a moving platform, in which the rotational stiffness is adjusted by an electromagnetic clutch, and the movements are measured using piezoelectric goniometer sensors. With an electrical lock, the device is capable of applying external pe...
Article
Full-text available
Orthotic interventions for knee osteoarthritis (OA) aim to reduce mechanical loading on the medial compartment of the knee and may lessen the lateral trunk lean as the most important compensatory gait strategy. The lateral wedge insole is a known orthotic intervention for knee OA. However, the question whether the addition of a subtalar strap to th...
Data
Purpose: According to the conventional arch model of the pelvis, stability of the sacroiliac joints may require a predominance of form and force closure mechanisms: the greater the vertical shear force at the sacroiliac joints, the greater the reliance on self-bracing by horizontally or obliquely oriented muscles (such as the internal oblique). Bu...
Article
Background: Rheumatoid arthritis is a chronic inflammatory joint disease which affects the joints and soft tissues of the foot and ankle. Rocker shoes may be prescribed for the symptomatic foot in rheumatoid arthritis; however, there is a limited evidence base to support the use of rocker shoes in these patients. Objectives: The aim of this stud...
Article
Although several studies have applied traditional linear measures to evaluate postural control of patients with multiple sclerosis (MS), little is known about the nonlinear dynamics of this patient group. In this study, recurrence quantification analysis (RQA), a well documented nonlinear method, was used to compare the nonlinear dynamical structur...
Article
Full-text available
Context: Flat foot is one of the lower extremity deformities that might change kinetic variables of gait. Fatigue is one of the factors that can alter the vertical ground-reaction force (GRF). The effect of a fatiguing condition on vertical GRF has not been documented in individuals with flat feet. Objective: To examine the fatigue effect on ver...
Article
Full-text available
Background: Biomechanical factors, such as spinal deformities can result in balance control disorders. Objectives: The purpose of this study was to examine the effect of bracing on static and dynamic balance control of hyperkyphotic female adolescents. Study design: Clinical trial. Methods: A force platform was employed to record center of p...
Article
Full-text available
The present study was aimed to analyze the control of posture in the subjects with CLBP in comparison with matched healthy adults in tow test conditions of with (12 kg) and without symmetrical external load. Twenty three healthy and 21 low back pain subjects participated. Postural sway was measured while participants stood on a force plate. We used...
Article
Full-text available
Introduction: The human foot is a strong mechanical structure that can affect function of the feet. The aim of this study was to determine the immediate effect of foot insole on myoelectric activity and co-contraction of lower leg muscles in individuals with flatfeet in comparison with healthy subjects. Materials and Methods: Thirty university male...
Article
It was hypothesized that training in 'static balance' or 'dynamic balance' sports has differential effects on postural control and its attention demands during quiet standing. In order to test this hypothesis, two groups of female athletes practicing shooting, as a 'static balance' sport, and Taekwondo, as a 'dynamic balance' sport, and a control g...
Article
Full-text available
Objective: In this research the effect of perturbation training on correlation index of detrended fluctuation analysis index (α) of anterior cruciate ligament deficient (ACL) patients was evaluated using nonlinear dynamic methods. Materials & methods: The study was done on ten male athletes with at least 6 months elapse after their ACL lesions. Sub...
Article
Full-text available
Most dentists complain of musculoskeletal disorders which can be caused by prolonged static posture, lack of suitable rest and other physical and psychological problems. We evaluated a chair with a new ergonomic design which incorporated forward leaning chest and arm supports. The chair was evaluated in the laboratory during task simulation and EMG...
Article
Full-text available
Objective: In this study, using nonlinear dynamics methods, dynamic stability index was used to assess the effect of perturbation training on anterior cruciate ligament (ACL) deficient patients. Materials & Methods: Non-randomized sampling was employed to recruit male athletes with at least 6 months elapsed after their ACL lesion. Using tilt board...
Article
Full-text available
Background and Aim: Because of high incidence of hand injuries and the need for a quantitative method that provides measures of patient improvement in treatment period, a precise and easy-toapply quantitative procedure is necessary. As a first step in validating of such a method, the intersession repeatability of quantified measures was assessed in...
Article
Full-text available
Background: Flexible flat foot is a congenital common deformity in lower extremity associated with ligamentus laxity. This deformity may cause hammer toe, heel spur, inflammation of achille tendon, early muscle fatigue during sport, foot imbalance and pain in leg, knee and hip. The use of insole with medial arch support considered as one of the com...
Article
Full-text available
t Purpose: The purpose of this research was to study the effect of change in movement direction in relation to gravity on control strategy and rate of electromyography rise in fast single joint elbow movements. Fifteen right handed men without any history of neuromotor injury (mean age of 24.8 ± 3.8 year) participated in this study. We asked of sub...
Article
Full-text available
Patellofemoral pain (PFP) is a common affliction and complex clinical entity. It is hypothesized to result from abnormal patellar tracking caused by altered motor control. Deficit in neuromotor control of the core may be a remote contributing factor to the development of PFP. Application of reliable EMG measures would be helpful to handle this theo...
Article
Full-text available
Background: Anterior cruciate ligament (ACL) damage is the most common injury of knee. It can change gait kinematics. Neuromuscular training and perturbation treatment programs are supposed to be effective in modifying gait kinematics of patients with ACL damage. The purpose of this study was to determine the effect of modified perturbation trainin...