35 The Impact of Postural Hyperkyphosis on Postural Stability and Cognition

2019 ◽  
Vol 48 (Supplement_4) ◽  
pp. iv9-iv12
Author(s):  
Krista Burns
Keyword(s):  
Vestibular System ◽  
Postural Stability ◽  
Muscle Activation ◽  
Treatment Protocol ◽  
The Elderly ◽  
Lower State ◽  
Muscle Activation Patterns ◽  
Injurious Falls ◽  
Postural Correction ◽  
The Impact

Abstract Background Postural Hyperkyphosis results from flexor dominant posture habits. Flexor dominance occurs due to dysfunction of the pontomedullary reticular formation (PMRF) of the brainstem and the vestibular system. The role of the PMRF is to inhibit anterior flexion above T6 spinal level, and the vestibular system stimulates upright postural extension and balance. When patients present with flexor dominance they have a Postural Hyperkyphosis postural distortion pattern and abnormal muscle activation patterns. To correct flexor dominance, practitioners should perform brain-based exercises, not just structural exercises. Brain based stimulation of the vestibular system and the brainstem stimulates upright extension of the Posture System and inhibition of anterior flexion to reduce Postural Hyperkyphosis. Postural Hyperkyphosis contributes to multiple health discrepancies. According to Cohen, Vasavada, and Wiest et al. (2016) in the Frontiers of Neuroscience, Postural Hyperkyphosis is associated with a lower state of cognition. According to Kado, Huang, and Nguyen et al. (2007) in the Journals of Gerontology hyperkyphosis is associated with poor balance and injurious falls in the elderly. Brainstem and vestibular activation reduces flexion and improves extension for better postural correction outcomes. Results Brain Based exercises reduce Postural Hyperkyphosis and improve postural stability and cognition of elderly patients. Brain Based exercises are safe for the elderly to perform and can be easily implemented into physical rehabilitation treatment plans for better postural correction results. Conclusion Correcting Postural Hyperkyphosis to improve Postural Stability and cognition requires a Brain Based treatment protocol.

scholarly journals Role of Occupational Footwear and Prolonged Walking on Lower Extremity Muscle Activation during Maximal Exertions and Postural Stability Tasks

Biomechanics ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 202-213
Author(s):  
Harish Chander ◽  
Sachini N. K. Kodithuwakku Arachchige ◽  
Alana J. Turner ◽  
Reuben F. Burch V ◽  
Adam C. Knight ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Muscle Activity ◽  
Repeated Measures ◽  
Postural Stability ◽  
Muscle Activation ◽  
Medial Gastrocnemius ◽  
Lower Extremity Muscle ◽  
Prolonged Duration ◽  
The Mean ◽  
The Impact

Background: Occupational footwear and a prolonged duration of walking have been previously reported to play a role in maintaining postural stability. The purpose of this paper was to analyze the impact of three types of occupational footwear: the steel-toed work boot (ST), the tactical work boot (TB), and the low-top work shoe (LT) on previously unreported lower extremity muscle activity during postural stability tasks. Methods: Electromyography (EMG) muscle activity was measured from four lower extremity muscles (vastus medialis (VM), medial hamstrings (MH), tibialis anterior (TA), and medial gastrocnemius (MG) during maximal voluntary isometric contractions (MVIC) and during a sensory organization test (SOT) every 30 min over a 4 h simulated workload while wearing ST, TB, and LT footwear. The mean MVIC and the mean and percentage MVIC during each SOT condition from each muscle was analyzed individually using a repeated measures ANOVA at an alpha level of 0.05. Results: Significant differences (p < 0.05) were found for maximal exertions, but this was limited to only the time main effect. No significant differences existed for EMG measures during the SOT. Conclusion: The findings suggest that occupational footwear type does not influence lower extremity muscle activity during both MVIC and SOT. Significantly lower muscle activity during maximal exertions over the course of the 4 h workload was evident, which can be attributed to localized muscular fatigue, but this was not sufficient to impact muscle activity during postural stability tasks.

scholarly journals Muscle Coactivation Before and After the Impact Phase of Running Following Isokinetic Fatigue

2011 ◽  
Vol 46 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Eleftherios Kellis ◽  
Andreas Zafeiridis ◽  
Ioannis G. Amiridis
Keyword(s):  
Muscle Activation ◽  
Biceps Femoris ◽  
Knee Extension ◽  
Knee Extensors ◽  
Training Experience ◽  
Cross Sectional ◽  
Muscle Activation Patterns ◽  
Strength Capacity ◽  
Before And After ◽  
The Impact

Abstract Context: The effects of fatigue on impact loading during running are unclear, with some authors reporting increased impact forces and others reporting decreased forces. Objective: To examine the effects of isokinetic fatigue on muscle cocontraction ratios about the knee and ankle during running. Design: Cross-sectional study. Setting: Neuromechanics laboratory. Patients or Other Participants: Female middle-distance runners (age  =  21.3 ± 1.93 years) with at least 5 years of training experience. Intervention(s): Participants ran on the treadmill at 3.61 m/s before and immediately after the fatigue protocol, which consisted of consecutive, concentric knee extension-flexion at 120°/s until they could no longer produce 30% of the maximum knee-extension moment achieved in the familiarization session for 3 consecutive repetitions. Main Outcome Measure(s): Electromyographic (EMG) amplitude of the vastus medialis (VM), biceps femoris (BF), gastrocnemius (GAS), and tibialis anterior (TA) was recorded using surface electrodes. Agonist∶antagonist EMG ratios for the knee (VM∶BF) and ankle (GAS∶TA) were calculated for the preactivation (PR), initial loading response (LR1), and late loading response (LR2) phases of running. Hip-, knee-, and ankle-joint angular displacements at initial foot contact were obtained from 3-dimensional kinematic tracings. Results: Fatigue did not alter the VM∶BF EMG ratio during the PR phase (P &gt; .05), but it increased the ratio during the LR1 phase (P &lt; .05). The GAS∶TA EMG ratio increased during the LR1 phase after fatigue (P &lt; .05) but remained unchanged during the PR and LR2 phrases (P &gt; .05). Conclusions: The increased agonist EMG activation, coupled with reduced antagonist EMG activation after impact, indicates that the acute decrease in muscle strength capacity of the knee extensors and flexors results in altered muscle-activation patterns about the knee and ankle before and after foot impact.

Effect of Osteopathic Manipulative Treatment Protocol on Balance in the Elderly

2011 ◽  
Author(s):  
Daniel Lopez ◽  
Hollis King ◽  
Janice Knebl ◽  
Victor Kosmopoulos ◽  
DeRaan Collins ◽  
...  
Keyword(s):  
Elderly Patients ◽  
Postural Stability ◽  
Balance Control ◽  
Treatment Protocol ◽  
The Elderly ◽  
Osteopathic Manipulative Treatment ◽  
Control Structures ◽  
Outcome Measurements

The purpose of this study it to understand the effect of Osteopathic Manipulative Treatment (OMT) on vestibular balance control structures. It was hypothesized that following an OMT treatment protocol, elderly patients would show significant improvement in empirical outcome measurements used to quantify postural stability.

scholarly journals The effect of support surface and footwear condition on postural sway and lower limb muscle action of the old people

2019 ◽  
Author(s):  
Meizhen Huang ◽  
Kit-lun Yick ◽  
Sun-pui Ng ◽  
Joanne Yip ◽  
Roy Cheung
Keyword(s):  
Lower Limb ◽  
Postural Stability ◽  
Muscle Activation ◽  
Postural Sway ◽  
The Elderly ◽  
The Body ◽  
Support Surface ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Age Related

Abstract Background: Diminished somatosensory function and lower plantar cutaneous sensitivity have been identified as a critical age-related change, which is related to postural instability in the older population. Footwear is suggested that can modulate the postural stability by altering the interface between the foot sole and the ground. However, it is unclear whether this footwear effect could also influence lower limb muscle activation for the elderly. This study aimed to investigate the footwear insole texture and supporting surface condition on static postural stability and lower limb muscle activation for healthy older people. Methods: This is a single-session study with repeated measurements. Twenty-three healthy older female stood on the firm (i.e., concrete floor) and foam surfaces with their eyes open in the three footwear conditions, namely barefoot, plain shoes and nodulous insole shoes, for 30 seconds. Static postural sway and muscle activation of biceps femoris (BF), vastus lateralis (VL), tibialis anterior (TA), and lateral gastrocnemius (LG) of the dominant leg were measured during each testing condition. Results: compared to firm surface, standing on the foam could significantly increase the body sway and lower limb muscle activation (p<0.05); compared to barefoot, when standing on the foam, wearing footwear significantly decreased the VL and TA muscle activation and minimize the postural sway in ML and AP direction, while the influence is larger for the nodulous shoes compared to the plain shoes. A positive correlation was observed between the lower limb muscle activation and AP (r=0.327-0.389, p<0.001) and total sway path length (r=0.317-0.427, p<0.001). Conclusions: footwear could improve the postural stability and decease the fall risk comparing to barefoot when the somatosensory input is in disturbance, while the improvement is larger when wearing nodulous insole footwear for the elderly.

scholarly journals Vision fine-tunes preparation for landing in the cane toad, Rhinella marina

2018 ◽  
Vol 14 (9) ◽  
pp. 20180397 ◽  
Author(s):  
Laura J. Ekstrom ◽  
Chris Panzini ◽  
Gary B. Gillis
Keyword(s):  
Muscle Activity ◽  
Muscle Activation ◽  
Activity Patterns ◽  
Fine Tuning ◽  
Emg Activity ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Impact Forces ◽  
Before And After ◽  
The Impact

In toad hopping, the hindlimbs generate the propulsive force for take-off while the forelimbs resist the impact forces associated with landing. Preparing to perform a safe landing, in which impact forces are managed appropriately, likely involves the integration of multiple types of sensory feedback. In toads, vestibular and/or proprioceptive feedback is critical for coordinated landing; however, the role of vision remains unclear. To clarify this, we compare pre-landing forelimb muscle activation patterns before and after removing vision. Specifically, we recorded EMG activity from two antagonistic forelimb muscles, the anconeus and coracoradialis, which demonstrate distance-dependent onset timing and recruitment intensity, respectively. Toads were first recorded hopping normally and then again after their optic nerves were severed to remove visual feedback. When blind, toads exhibited hop kinematics and pre-landing muscle activity similar to when sighted. However, distance-dependent relationships for muscle activity patterns were more variable, if present at all. This study demonstrates that blind toads are still able to perform coordinated landings, reinforcing the importance of proprioceptive and/or vestibular feedback during hopping. But the increased variability in distance-dependent activity patterns indicates that vision is more responsible for fine-tuning the motor control strategy for landing.

scholarly journals The impact of shoe flexibility on gait, pressure and muscle activity of young children. A systematic review

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Simone Cranage ◽  
Luke Perraton ◽  
Kelly-Ann Bowles ◽  
Cylie Williams
Keyword(s):  
Systematic Review ◽  
Sample Size ◽  
Plantar Pressure ◽  
Muscle Activation ◽  
Step Length ◽  
Older Children ◽  
Limited Evidence ◽  
Muscle Activation Patterns ◽  
Peak Plantar Pressure ◽  
The Impact

Abstract Background There is limited evidence of shoe impact in younger children, particularly in the context of immature gait patterns. It is unclear if the impact from shoes in younger children is similar to what has been seen in older children. This systematic review aims to identify any impact of shoe features on younger children’s gait, and if there are any differences between shoe sole flexibility compared to barefoot. Methods Study inclusion criteria included: typically developing children aged ≤6 years; comparison of barefoot and shod conditions (walking and/or running) with shoe features or style of shoe described; sample size > 1. Novelty types of footwear were excluded, as was any mention of in shoe support or modifications. Studies were located from six databases. Study methodology was assessed using the McMasters critical review form. Sample size weighted standardized mean differences (SMD) and 95% confidence intervals (CI) were calculated. Results Four studies were included. Participant age ranged from 15.2 to 78.7 months, with 262 participants across all studies. All studies had limited methodological bias based on their design type. Compared to barefoot walking, shoes increased velocity, step time and step length. Shod walking decreased cadence. Peak plantar pressure was generally lower in the stiff shoe design and there was a higher peak plantar pressure in the Ultraflex shoes. No studies were found investigating muscle activation. Conclusions Shoes affect younger children’s gait in spatiotemporal gait aspects, similar to those seen in older children. There is limited evidence on effects of particular shoe features such as sole hardness, on gait, and no evidence of any changes in muscle activation patterns. Further research is required to evaluate the impact of different types of shoe and shoe features in this population to provide clinical advice on the type of shoe that is appropriate in this age group.

scholarly journals Evaluation of Postural Stability in Young and Elderly Women

2018 ◽  
Vol 10 (1) ◽  
pp. 134-140
Author(s):  
Tomasz Marciniak ◽  
Ida Wiszomirska ◽  
Lidia Ilnicka
Keyword(s):  
Effect Size ◽  
Postural Stability ◽  
Elderly Women ◽  
The Elderly ◽  
Relative Difference ◽  
Younger Women ◽  
Balance System ◽  
Eyes Open ◽  
Comparison Of The Results ◽  
The Impact

AbstractStudy aim: Assessment of postural stability performed on an unstable stabilometry platform. Comparison of the results ob­tained by two groups consisting of elderly (OW) (60+ years old) and younger women (YW).Material and methods: Seventy-three female volunteers were divided into two groups: 40 young women (20.2 ± 1.75), and 32 elderly women (68.3 ± 7.43). Participants performed five stability tests on Biodex Balance System SD: three 20-second tries, the Postural Stability Test (PST) and the Fall Risk Test (FRT). Three stability indexes - overall (OSI), anterior-posterior (APSI), and medial-lateral (MLSI) - both with eyes open (EO) and closed (EC) were analyzed. The impact of vision on balance was calculated as EC-EO. Also effect size was calculated and evaluated.Results: All of the parameters differed significantly between groups in favour of YW. The largest difference in significance as well as effect size was noted for FRT, p < 0.001 and 1.86 respectively. Tries measure the impact of vision on balance (EC-EO). The results concerning tries with EC-EO showed the strongest discrimination between groups - OSI p = 0.0088 (relative differ­ence 0.23 ± 0.26) and APSI p = 0.0268 (relative difference 0.17 ± 0.2). YW had a significantly better outcome.Conclusions: YW had better results in all of the parameters taken into consideration, with most of them being significant. This confirms that all of the regressive changes appearing with age influence balance. Lack of visual input (EC) in OW caused sig­nificantly worse results in most of the measured parameters, showing that vision is a very important factor for balance mainte­nance in the elderly.

scholarly journals Influence of Age on Neuromuscular Control during a Dynamic Weight-Bearing Task

2009 ◽  
Vol 17 (3) ◽  
pp. 327-343 ◽  
Author(s):  
Sangeetha Madhavan ◽  
Sarah Burkart ◽  
Gail Baggett ◽  
Katie Nelson ◽  
Trina Teckenburg ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Control Strategies ◽  
Weight Bearing ◽  
Neuromuscular Control ◽  
The Elderly ◽  
Joint Injury ◽  
Activation Patterns ◽  
Muscle Activation Patterns ◽  
Knee Movement ◽  
Long Latency

Neuromuscular control strategies might change with age and predispose the elderly to knee-joint injury. The purposes of this study were to determine whether long latency responses (LLRs), muscle-activation patterns, and movement accuracy differ between the young and elderly during a novel single-limb-squat (SLS) task. Ten young and 10 elderly participants performed a series of resistive SLSs (~0–30°) while matching a computer-generated sinusoidal target. The SLS device provided a 16% body-weight resistance to knee movement. Both young and elderly showed significant overshoot error when the knee was perturbed (p< .05). Accuracy of the tracking task was similar between the young and elderly (p= .34), but the elderly required more muscle activity than the younger participants (p< .05). The elderly group had larger LLRs than the younger group (p< .05). These results support the hypothesis that neuromuscular control of the knee changes with age and might contribute to injury.

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