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Sports Health 2018Current perception dictates that glenohumeral internal rotation deficit (GIRD) is a chronic adaptation that leads to an increased risk of pathologic conditions in the... (Meta-Analysis)
Meta-Analysis Review
CONTEXT
Current perception dictates that glenohumeral internal rotation deficit (GIRD) is a chronic adaptation that leads to an increased risk of pathologic conditions in the dominant shoulder or elbow of overhead athletes.
OBJECTIVE
To determine whether adaptations in glenohumeral range of motion in overhead athletes lead to injuries of the upper extremity, specifically in the shoulder or elbow.
DATA SOURCES
An electronic database search was performed using Medline, Embase, and SportDiscus from 1950 to 2016. The following keywords were used: GIRD, glenohumeral internal rotation deficit, glenohumeral deficit, shoulder, sport, injury, shoulder joint, baseball, football, racquet sports, volleyball, javelin, cricket, athletic injuries, handball, lacrosse, water polo, hammer throw, and throwing injury.
STUDY SELECTION
Seventeen studies met the inclusion criteria for this systematic review. Of those 17 studies, 10 included specific range of motion measurements required for inclusion in the meta-analysis.
STUDY DESIGN
Systematic review and meta-analysis.
LEVEL OF EVIDENCE
Level 4.
DATA EXTRACTION
Data on demographics and methodology as well as shoulder range of motion in various planes were collected when possible. The primary outcome of interest was upper extremity injury, specifically shoulder or elbow injury.
RESULTS
The systematic review included 2195 athletes (1889 males, 306 females) with a mean age of 20.8 years. Shoulders with GIRD favored an upper extremity injury, with a mean difference of 3.11° (95% CI, -0.13° to 6.36°; P = 0.06). Shoulder total range of motion suggested increased motion (mean difference, 2.97°) correlated with no injury ( P = 0.11), and less total motion (mean difference, 1.95°) favored injury ( P = 0.14). External rotational gain also favored injury, with a mean difference of 1.93° ( P = 0.07).
CONCLUSION
The pooled results of this systematic review and meta-analysis did not reach statistical significance for any shoulder motion measurement and its correlation to shoulder or elbow injury. Results, though not reaching significance, favored injury in overhead athletes with GIRD, as well as rotational loss and external rotational gain.
Topics: Adaptation, Physiological; Athletic Injuries; Elbow; Female; Humans; Male; Range of Motion, Articular; Risk Factors; Rotation; Shoulder Injuries; Shoulder Joint; Young Adult; Elbow Injuries
PubMed: 29381423
DOI: 10.1177/1941738118756577 -
Sports Medicine - Open Jun 2023Long-term stretching of human skeletal muscles increases joint range of motion through altered stretch perception and decreased resistance to stretch. There is also some...
BACKGROUND
Long-term stretching of human skeletal muscles increases joint range of motion through altered stretch perception and decreased resistance to stretch. There is also some evidence that stretching induces changes in muscle morphology. However, research is limited and inconclusive.
OBJECTIVE
To examine the effect of static stretching training on muscle architecture (i.e., fascicle length and fascicle angle, muscle thickness and cross-sectional area) in healthy participants.
DESIGN
Systematic review and meta-analysis.
METHODS
PubMed Central, Web of Science, Scopus, and SPORTDiscus were searched. Randomized controlled trials and controlled trials without randomization were included. No restrictions on language or date of publication were applied. Risk of bias was assessed using Cochrane RoB2 and ROBINS-I tools. Subgroup analyses and random-effects meta-regressions were also performed using total stretching volume and intensity as covariates. Quality of evidence was determined by GRADE analysis.
RESULTS
From the 2946 records retrieved, 19 studies were included in the systematic review and meta-analysis (n = 467 participants). Risk of bias was low in 83.9% of all criteria. Confidence in cumulative evidence was high. Stretching training induces trivial increases in fascicle length at rest (SMD = 0.17; 95% CI 0.01-0.33; p = 0.042) and small increases in fascicle length during stretching (SMD = 0.39; 95% CI 0.05 to 0.74; p = 0.026). No increases were observed in fascicle angle or muscle thickness (p = 0.30 and p = 0.18, respectively). Subgroup analyses showed that fascicle length increased when high stretching volumes were used (p < 0.004), while no changes were found for low stretching volumes (p = 0.60; subgroup difference: p = 0.025). High stretching intensities induced fascicle length increases (p < 0.006), while low stretching intensities did not have an effect (p = 0.72; subgroup difference: p = 0.042). Also, high intensity stretching resulted in increased muscle thickness (p = 0.021). Meta-regression analyses showed that longitudinal fascicle growth was positively associated with stretching volume (p < 0.02) and intensity (p < 0.04).
CONCLUSIONS
Static stretching training increases fascicle length at rest and during stretching in healthy participants. High, but not low, stretching volumes and intensities induce longitudinal fascicle growth, while high stretching intensities result in increased muscle thickness.
REGISTRATION
PROSPERO, registration number: CRD42021289884.
PubMed: 37318696
DOI: 10.1186/s40798-023-00591-7 -
Schizophrenia Research Dec 2017Patients with schizophrenia show impairments in processing of biological motion. This is especially important since deficits in domains of social cognition has been... (Meta-Analysis)
Meta-Analysis Review
CONTEXT
Patients with schizophrenia show impairments in processing of biological motion. This is especially important since deficits in domains of social cognition has been associated with functional outcome and everyday functioning in this population.
OBJECTIVES
We conducted a systematic review and meta-analysis of studies which have used point-light displays to present whole-body motion to patients with schizophrenia and healthy controls, to evaluate the magnitude of differences between these groups in biological motion processing.
METHOD
Firstly, relevant publications were identified by a systematic search of Google Scholar and PubMed databases. Secondly, we excluded non-relevant studies for the meta-analysis according to our exclusion criteria. Effect sizes were expressed as standardized mean difference (SMD).
RESULTS
15 papers reporting results of 14 different experiments with 571 patients and 482 controls were included in the meta-analysis. The results for the general biological motion perception analysis revealed that patients with schizophrenia (compared with healthy controls) present reduced biological motion processing capacity with the effect size (SMD) of 0.66 (95% CI, -0.79 to -0.54; p<0.001). The results for the specific biological motion-based tasks were also statistically significant with SMD of 0.72 for Basic Biological Motion task (95% CI: -0.94 to -0.51; p<0.001) and SMD of 0.61 for Emotion in Biological Motion task, (95% CI: -0.79 to -0.43; p<0.001) respectively.
CONCLUSION
The findings from our meta-analysis highlight abnormalities in general and specific domains of biological motion perception in schizophrenia patients as compared with healthy controls.
Topics: Humans; Motion Perception; Perceptual Disorders; Schizophrenic Psychology; Social Perception
PubMed: 28285029
DOI: 10.1016/j.schres.2017.03.013 -
Journal of Dance Medicine & Science :... 2016In dance, the goals of actions are not always clearly defined. Investigations into the perceived quality of dance actions and their relation to biomechanical motion... (Review)
Review
In dance, the goals of actions are not always clearly defined. Investigations into the perceived quality of dance actions and their relation to biomechanical motion should give insight into the performance of dance actions and their goals. The purpose of this review was to explore and document current literature concerning dance perception and its relation to the biomechanics of motion. Seven studies were included in the review. The study results showed systematic differences between expert, non-expert, and novice dancers in biomechanical and perceptual measures, both of which also varied according to the actions expressed in dance. Biomechanical and perceptual variables were found to be correlated in all the studies in the review. Significant relations were observed between kinematic variables such as amplitude, speed, and variability of movement, and perceptual measures of beauty and performance quality. However, in general, there were no clear trends in these relations. Instead, the evidence suggests that perceptual ratings of dance may be specific to both the task (the skill of the particular action) and the context (the music and staging). The results also suggest that the human perceptual system is sensitive to skillful movements and neuromuscular coordination. Since the value perceived by audiences appears to be related to dance action goals and the coordination of dance elements, practitioners could place a priority on development and execution of those factors.
Topics: Biomechanical Phenomena; Dancing; Esthetics; Evidence-Based Medicine; Humans; Motion Perception; Motor Activity; Research Design; Task Performance and Analysis
PubMed: 27661625
DOI: 10.12678/1089-313X.20.3.127 -
Journal of the American Medical... Jun 2024To examine relationships between visual function (ie, contrast sensitivity, visual field, color vision, and motion perception) and cognitive impairment, including any... (Review)
Review
OBJECTIVES
To examine relationships between visual function (ie, contrast sensitivity, visual field, color vision, and motion perception) and cognitive impairment, including any definition of "cognitive impairment," mild cognitive impairment, or dementia.
DESIGN
Systematic review and meta-analyses.
SETTING AND PARTICIPANTS
Any settings; participants with (cases) or without (controls) cognitive impairment.
METHODS
We searched 4 databases (to January 2024) and included published studies that compared visual function between cases and controls. Standardized mean differences (SMD) with 95% CIs were calculated where data were available. Data were sufficient for meta-analyses when cases were people with dementia. The Joanna Briggs Institute checklists were used for quality assessment.
RESULTS
Fifty-one studies/69 reports were included. Cross-sectional evidence shows that people with dementia had worse contrast sensitivity function and color vision than controls: measured by contrast sensitivity (log units) on letter charts, SMD -1.22 (95% CI -1.98, -0.47), or at varied spatial frequencies, -0.90 (-1.21, -0.60); and by pseudoisochromatic plates, -1.04 (-1.59, -0.49); color arrangement, -1.30 (-2.31, -0.29); or matching tests, -0.51 (-0.78, -0.24). They also performed more poorly on tests of motion perception, -1.20 (-1.73, -0.67), and visual field: mean deviation, -0.87 (-1.29, -0.46), and pattern standard deviation, -0.69 (-1.24, -0.15). Results were similar when cases were limited to participants with clinically diagnosed Alzheimer disease. Sources of bias included lack of clarity on study populations or settings and definitions of cognitive impairment. The 2 included longitudinal studies with follow-ups of approximately 10 years were of good quality but reported inconsistent results.
CONCLUSIONS AND IMPLICATIONS
In the lack of longitudinal data, cross-sectional studies indicate that individuals with cognitive impairment have poorer visual function than those with normal cognition. Additional longitudinal data are needed to understand whether poor visual function precedes cognitive impairment and the most relevant aspects of visual function, dementia pathologies, and domains of cognition.
PubMed: 38908397
DOI: 10.1016/j.jamda.2024.105098 -
Disability and Rehabilitation May 2023To analyze the effectiveness of resistance training programs (RTP) on strength, functional capacity, balance, general health perception, and fatigue for people with... (Meta-Analysis)
Meta-Analysis
Effects and optimal dosage of resistance training on strength, functional capacity, balance, general health perception, and fatigue in people with multiple sclerosis: a systematic review and meta-analysis.
PURPOSE
To analyze the effectiveness of resistance training programs (RTP) on strength, functional capacity, balance, general health perception, and fatigue for people with Multiple Sclerosis (MS) and to determine the most effective dose of RTP in this population.
METHODS
Studies examining the effect of RTP on strength, functional capacity, balance, general health perception, and fatigue in MS patients were included. 44 studies were included. The meta-analysis, subgroup analysis and meta-regression methods were used to calculate the mean difference and standardized mean difference.
RESULTS
Significant group differences were observed in knee extensor ( = 0.01) and flexor ( < 0.001), but not in 1-repetition maximum. Regarding functional capacity and balance, differences between groups, in favour of the RTP group, were found in the Timed Up and Go Test ( = 0.001), walking endurance, ( = 0.02) gait speed ( = 0.02) and balance ( = 0.02). No significant differences between groups were observed in fatigue or general health perception. The results regarding the optimal dose are inconsistent.
CONCLUSIONS
RTP improves strength, functional capacity, balance, and fatigue in people with MS. (PROSPERO): CRD42020182781Implications for rehabilitationResistance training is a valid strategy to improve isometric strength and functional capacity in MS patients.RTP using long durations (more than 6 weeks), high intensity (more than 80% 1-RM) and two-day weekly training frequency may be a correct stimulus to improve strength, functional capacity, balance, and fatigue in people with MS.Trainers and rehabilitators should consider these indicators in order to maximize muscular and functional adaptations in this population.
Topics: Humans; Resistance Training; Multiple Sclerosis; Postural Balance; Muscle Strength; Time and Motion Studies; Fatigue; Health Status; Perception
PubMed: 35579532
DOI: 10.1080/09638288.2022.2069295 -
Schizophrenia Research Feb 2023Visual illusions have long been used as tools to investigate sensory-perceptual deficits in schizophrenia. Recent conflicting accounts have called into question the... (Review)
Review
Visual illusions have long been used as tools to investigate sensory-perceptual deficits in schizophrenia. Recent conflicting accounts have called into question the assumption of abnormal illusion perception in patients and, therefore, the validity of this approach. Here, we present a systematic review of the current evidence regarding visual illusion perception abnormalities in patients with schizophrenia. Relevant publications were identified by a systematic search of PubMed, Literatura LILACS, PsycINFO, Embase, Scopus, Cochrane Central Register of Controlled Trials (CENTRAL), IBECS, BIOSIS, and Web of Science. Forty-five studies were selected which included illusions classified as 'Motion illusions', 'Geometric-optical illusions', 'Illusory contours', 'Depth inversion illusion', and 'Non-specific'. There is concordant evidence of abnormal processing of illusions in patients for most categories, especially in facial Depth Inversion and Müller-Lyer illusions. There were significant methodological disparities and shortcomings, but risk of bias was overall low for individual studies. The usefulness of visual illusions as tools in clinical settings as well as in basic research may be contingent on significant methodological refinements.
Topics: Humans; Illusions; Schizophrenia; Optical Illusions; Form Perception; Visual Perception
PubMed: 36610221
DOI: 10.1016/j.schres.2022.12.030 -
The Cochrane Database of Systematic... May 2020Stroke is caused by the interruption of blood flow to the brain (ischemic stroke) or the rupture of blood vessels within the brain (hemorrhagic stroke) and may lead to... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Stroke is caused by the interruption of blood flow to the brain (ischemic stroke) or the rupture of blood vessels within the brain (hemorrhagic stroke) and may lead to changes in perception, cognition, mood, speech, health-related quality of life, and function, such as difficulty walking and using the arm. Activity limitations (decreased function) of the upper extremity are a common finding for individuals living with stroke. Mental practice (MP) is a training method that uses cognitive rehearsal of activities to improve performance of those activities.
OBJECTIVES
To determine whether MP improves outcomes of upper extremity rehabilitation for individuals living with the effects of stroke. In particular, we sought to (1) determine the effects of MP on upper extremity activity, upper extremity impairment, activities of daily living, health-related quality of life, economic costs, and adverse effects; and (2) explore whether effects differed according to (a) the time post stroke at which MP was delivered, (b) the dose of MP provided, or (c) the type of comparison performed.
SEARCH METHODS
We last searched the Cochrane Stroke Group Trials Register on September 17, 2019. On September 3, 2019, we searched the Cochrane Central Register of Controlled Trials (the Cochrane Library), MEDLINE, Embase, the Cumulative Index to Nursing and Allied Health Literature (CINAHL), PsycINFO, Scopus, Web of Science, the Physiotherapy Evidence Database (PEDro), and REHABDATA. On October 2, 2019, we searched ClinicalTrials.gov and the World Health Organization International Clinical Trials Registry Platform. We reviewed the reference lists of included studies.
SELECTION CRITERIA
We included randomized controlled trials (RCTs) of adult participants with stroke who had deficits in upper extremity function (called upper extremity activity).
DATA COLLECTION AND ANALYSIS
Two review authors screened titles and abstracts of the citations produced by the literature search and excluded obviously irrelevant studies. We obtained the full text of all remaining studies, and both review authors then independently selected trials for inclusion. We combined studies when the review produced a minimum of two trials employing a particular intervention strategy and a common outcome. We considered the primary outcome to be the ability of the arm to be used for appropriate tasks, called upper extremity activity. Secondary outcomes included upper extremity impairment (such as quality of movement, range of motion, tone, presence of synergistic movement), activities of daily living (ADLs), health-related quality of life (HRQL), economic costs, and adverse events. We assessed risk of bias in the included studies and applied GRADE to assess the certainty of the evidence. We completed subgroup analyses for time since stroke, dosage of MP, type of comparison, and type of arm activity outcome measure.
MAIN RESULTS
We included 25 studies involving 676 participants from nine countries. For the comparison of MP in addition to other treatment versus the other treatment, MP in combination with other treatment appears more effective in improving upper extremity activity than the other treatment without MP (standardized mean difference [SMD] 0.66, 95% confidence interval [CI] 0.39 to 0.94; I² = 39%; 15 studies; 397 participants); the GRADE certainty of evidence score was moderate based on risk of bias for the upper extremity activity outcome. For upper extremity impairment, results were as follows: SMD 0.59, 95% CI 0.30 to 0.87; I² = 43%; 15 studies; 397 participants, with a GRADE score of moderate, based on risk of bias. For ADLs, results were as follows: SMD 0.08, 95% CI -0.24 to 0.39; I² = 0%; 4 studies; 157 participants; the GRADE score was low due to risk of bias and small sample size. For the comparison of MP versus conventional treatment, the only outcome with available data to combine (3 studies; 50 participants) was upper extremity impairment (SMD 0.34, 95% CI -0.33 to 1.00; I² = 21%); GRADE for the impairment outcome in this comparison was low due to risk of bias and small sample size. Subgroup analyses of time post stroke, dosage of MP, or comparison type for the MP in combination with other rehabilitation treatment versus the other treatment comparison showed no differences. The secondary outcome of health-related quality of life was reported in only one study, and no study noted the outcomes of economic costs and adverse events.
AUTHORS' CONCLUSIONS
Moderate-certainty evidence shows that MP in addition to other treatment versus the other treatment appears to be beneficial in improving upper extremity activity. Moderate-certainty evidence also shows that MP in addition to other treatment versus the other treatment appears to be beneficial in improving upper extremity impairment after stroke. Low-certainty evidence suggests that ADLs may not be improved with MP in addition to other treatment versus the other treatment. Low-certainty evidence also suggests that MP versus conventional treatment may not improve upper extremity impairment. Further study is required to evaluate effects of MP on time post stroke, the volume of MP required to affect outcomes, and whether improvement is maintained over the long term.
Topics: Arm; Combined Modality Therapy; Female; Humans; Imagination; Male; Paresis; Practice, Psychological; Randomized Controlled Trials as Topic; Recovery of Function; Stroke; Stroke Rehabilitation
PubMed: 32449959
DOI: 10.1002/14651858.CD005950.pub5 -
PloS One 2024Adolescent idiopathic scoliosis (AIS) is a spinal deformity that affects approximately 4% of the world's population. Several hypotheses regarding the etiology of AIS...
BACKGROUND
Adolescent idiopathic scoliosis (AIS) is a spinal deformity that affects approximately 4% of the world's population. Several hypotheses regarding the etiology of AIS have been investigated. In the last decades, impaired visual-spatial perception, alterations in spatial body orientation and sensory integration deficits have been documented.
OBJECTIVE
We aimed to summarize the neurophysiological, balance, and motion evidence related to AIS published in the last fifteen years, between January 2008 and April 2023. Both observational and interventional studies were considered. Only studies using quantitative assessment methods, such as electroencephalography (EEG), electromyography (EMG), magnetic resonance imaging (MRI), somatosensory evoked potentials, force platform, or motion capture, were included.
METHODS
1250 eligible records identified from online database searching were filtered by duplicate removal, title and abstract screening, and qualitative analysis. 61 articles met the inclusion criteria (i.e., Cobb range 10°-35°, age range 10-18 years) and were summarized.
RESULTS
We found significant evidence of impaired standing balance in individuals with AIS who greatly rely on visual and proprioceptive information to stay upright. EMG studies frequently reported an increased activity on the convex side of the intrinsic spinae muscles. EEG data show increased delta and theta power, higher alpha peak frequencies, and significant suppression in the alpha and beta bands in subjects with AIS during standing tasks. MRI studies report changes in white matter structures, differences in the vestibular system, and abnormal cortical activations over motor-related areas in subjects with AIS. Bracing appears to be an effective treatment for AIS, leading to improvements in static balance and gait. Methodological issues prevent reliable conclusions about the effects of other treatment options.
CONCLUSIONS
This review underscores the importance of quantitative assessment methods to explore the etiology and pathophysiology of AIS. Further research is needed to measure the impact of physical therapy and orthotic treatments on the neurophysiological mechanisms of the disease.
Topics: Humans; Scoliosis; Adolescent; Postural Balance; Electroencephalography; Magnetic Resonance Imaging; Electromyography; Evoked Potentials, Somatosensory; Child; Female
PubMed: 38776317
DOI: 10.1371/journal.pone.0303086 -
Neuroscience and Biobehavioral Reviews Jan 2019The motion aftereffect (MAE) provides a behavioural probe into the mechanisms underlying motion perception, and has been used to study the effects of attention on motion... (Meta-Analysis)
Meta-Analysis
The motion aftereffect (MAE) provides a behavioural probe into the mechanisms underlying motion perception, and has been used to study the effects of attention on motion processing. Visual attention can enhance detection and discrimination of selected visual signals. However, the relationship between attention and motion processing remains contentious: not all studies find that attention increases MAEs. Our meta-analysis reveals several factors that explain superficially discrepant findings. Across studies (37 independent samples, 76 effects) motion adaptation was significantly and substantially enhanced by attention (Cohen's d = 1.12, p < .0001). The effect more than doubled when adapting to translating (vs. expanding or rotating) motion. Other factors affecting the attention-MAE relationship included stimulus size, eccentricity and speed. By considering these behavioural analyses alongside neurophysiological work, we conclude that feature-based (rather than spatial, or object-based) attention is the biggest driver of sensory adaptation. Comparisons between naïve and non-naïve observers, different response paradigms, and assessment of 'file-drawer effects' indicate that neither response bias nor publication bias are likely to have significantly inflated the estimated effect of attention.
Topics: Adaptation, Physiological; Adaptation, Psychological; Animals; Attention; Humans; Motion Perception; Psychophysics
PubMed: 30355521
DOI: 10.1016/j.neubiorev.2018.10.010