The effect of impaired lower limb joint function on postural balance and falls

1994 ◽  
Vol 27 (5) ◽  
pp. 603 ◽  
Keyword(s):  
Lower Limb ◽  
Postural Balance ◽  
Joint Function

The effect of different Masai Barefoot Technology (MBT) shoe models on postural balance, lower limb muscle activity and instability assessment

2012 ◽  
Vol 4 (2) ◽  
pp. 93-100 ◽  
Author(s):  
Michael Buchecker ◽  
Jürgen Pfusterschmied ◽  
Stefan Moser ◽  
Erich Müller
Keyword(s):  
Lower Limb ◽  
Muscle Activity ◽  
Postural Balance ◽  
Lower Limb Muscle ◽  
Limb Muscle

scholarly journals The influence of lower-limb dominance on postural balance

2011 ◽  
Vol 129 (6) ◽  
pp. 410-413 ◽  
Author(s):  
Angélica Castilho Alonso ◽  
Guilherme Carlos Brech ◽  
Andréia Moraes Bourquin ◽  
Julia Maria D'Andréa Greve
Keyword(s):  
Lower Limb ◽  
Postural Balance ◽  
Sensory Information ◽  
Cross Sectional Study ◽  
Balance Test ◽  
Cross Sectional ◽  
Balance System ◽  
Leg Dominance ◽  
Limb Dominance ◽  
Instability Indices

CONTEXT AND OBJECTIVE: Maintainance of postural balance requires detection of body movements, integration of sensory information in the central nervous system and an appropriate motor response. The purpose of this study was to evaluate whether lower-limb dominance has an influence on postural balance. DESIGN AND SETTING: This was a cross-sectional study conducted at Faculdade de Medicina da Universidade de São Paulo (FMUSP) and at Hospital do Coração (HCor). METHODS: Forty healthy sedentary males aged 20 to 40 years, without any injuries, were evaluated. A single-foot balance test was carried out using the Biodex Balance System equipment, comparing the dominant leg with the nondominant leg of the same individual. The instability protocols used were level 8 (more stable) and level 2 (less stable), and three instability indices were calculated: anteroposterior, mediolateral and general. RESULTS: The volunteers' mean age was 26 ± 5 years (range: 20-38), mean weight 72.3 ± 11 kg (range: 46-107) and mean height 176 ± 6 cm (range: 169-186). Thirty-four of them (85%) presented right-leg dominance (defined according to which leg they used for kicking) and six (15%) had left-leg dominance. There were no significant differences between the dominant and nondominant legs at the two levels of stability (eight and two), for any of the instability indices (general, anteroposterior and mediolateral). CONCLUSION: The lower-limb dominance did not influence single-foot balance among sedentary males.

Feature Evaluation and Pattern Recognition of Lower Limb Muscle EMG during Postural Balance Control

2006 ◽  
Vol 326-328 ◽  
pp. 867-870 ◽  
Author(s):  
Hyeon Ki Choi ◽  
Jae Hoon Jeong ◽  
Sung Ho Hwang ◽  
Hyeon Chang Choi ◽  
Won Hak Cho
Keyword(s):  
Neural Networks ◽  
Lower Limb ◽  
Postural Balance ◽  
Balance Control ◽  
Recovery Process ◽  
Success Rates ◽  
Feature Evaluation ◽  
Lower Limb Muscles ◽  
Emg Signal ◽  
Limb Muscles

We recognized EMG signal patterns of lower limb muscles by using neural networks and performed feature evaluation during the recovery of postural balance of human body. Surface electrodes were attached to lower limb and EMG signals were collected during the balance recovery process from a perturbation without permitting compensatory stepping. A waist pulling system was used to apply transient perturbations in five horizontal directions. The EMG signals of fifty repetitions of five motions were analyzed for ten subjects. Twenty features were extracted from EMG signals of one event. Feature evaluation was also performed by using DB (Davies-Bouldin) index. By using neural networks, EMG signals were classified into five categories, such as forward perturbation, backward perturbation, lateral perturbation and two oblique perturbations. As results, motions were recognized with mean success rates of 75 percent. With the neural networks classifier of this study, the EMG patterns of lower limb muscles during the recovery of postural balance can be classified with high accuracy of recognition.

Mechanical advantage and joint function of the lower limb during hopping at different frequencies

2021 ◽  
Vol 118 ◽  
pp. 110294
Author(s):  
Andrea Monte ◽  
Francesca Nardello ◽  
Paola Zamparo
Keyword(s):  
Lower Limb ◽  
Joint Function ◽  
Mechanical Advantage

scholarly journals Lower limb in the preparticipation examination (PPE)

2019 ◽  
Vol 67 (3) ◽  
Keyword(s):  
Risk Factors ◽  
Lower Extremity ◽  
Musculoskeletal Disorders ◽  
Clinical Examination ◽  
Lower Limb ◽  
Dynamic Testing ◽  
Joint Function

This article described the clinical examination of the lower extremity during a pre-participation screening in regard of sports ability, presence of injuries and musculoskeletal disorders as well as predisposing risk factors for injuries and prevention. It divided into global static and dynamic testing but also isolated analysis of joint function.

Posture and Gait Biomechanical Aspects during Pregnancy and the Importance of Therapeutic Exercise: Literature Review

2015 ◽  
Vol 11 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Ana Paula Ribeiro
Keyword(s):  
Pregnant Women ◽  
Lower Limb ◽  
Postural Balance ◽  
Plantar Flexion ◽  
Moderate Intensity ◽  
Therapeutic Effects ◽  
Valgus Knee ◽  
Limb Alignment ◽  
Lower Limb Alignment ◽  
Increased Risk

The purpose of this study was to analyze studies that have investigated posture and gait during pregnancy and the importance of exercise. For this purpose, a systematic literature search was conducted on the following electronic databases: Scielo, Scopus, Embase, Pubmed, and Medline. Gait biomechanics, posture, lower limb alignment, postural balance, and physical exercise studies from 1943 to 2014 were accepted as potentially relevant for inclusion in this review. In general, posture studies showed that pregnant women demonstrated pain and discomfort in the pelvis and lumbar spine during pregnancy and after childbirth. Static posture changes, such as increased lumbar and thoracic curvatures during pregnancy and up to two months after childbirth, pelvic anteversion, and stretching of the abdominal musculature resulted in reduced functional stability of the hip. The lower limb alignment studies showed hyperextension or valgus knee and decreased longitudinal arch with increased support bases and distances between the feet. Postural balance studies showed that postural stability decreased during pregnancy and after childbirth, leading to an increased risk of falls. Gait studies showed a pattern of feet rollover with greater stance phase duration, a decrease of plantar flexion and propulsion force associated with increased hip flexion, as well as extensor and abductor moments. Other changes were characterized by greater anterior-posterior and medial-lateral sway with increased plantar load over the forefoot and rearfoot areas. Gait training and resistance exercises at moderate intensity showed to be low-cost aerobic exercises with positive therapeutic effects to reduce the risk of pre-eclampsia and gestational diabetes mellitus. However, no studies were found regarding the therapeutic effects of exercise to improve the biomechanical aspects of posture, specially lumbar curvature, knee angle and plantar arch, and of gait, such as propulsion, hip angle and overload feet in pregnant women.

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