The Influence of Profession on Functional Ankle Stability in Musicians

2010 ◽  
Vol 25 (1) ◽  
pp. 22-28 ◽  
Author(s):  
Susanne Rein ◽  
Tobias Fabian ◽  
Hans Zwipp ◽  
Jan Heineck ◽  
Stephan Weindel
Keyword(s):  
Reaction Time ◽  
Ankle Joint ◽  
Postural Balance ◽  
Balance Control ◽  
Ankle Sprains ◽  
Exact Test ◽  
Work Related ◽  
Ankle Stability ◽  
Ankle Joints ◽  
The Right

OBJECTIVE: The aim of this study was to examine the influence of extensive work-related use of the feet on functional ankle stability among musicians. METHODS: Thirty professional organists were compared to professional pianists and controls. All participants completed a questionnaire. Range of motion (ROM), peroneal reaction time, and positional sense tests of the ankle were measured. The postural balance control was investigated with the Biodex Stability System for the stable level 8 and unstable level 2. Statistical analysis was done with the Kruskal-Wallis test, Mann-Whitney test with Bonferroni-Holm correction, and Fisher’s exact test. RESULTS: Nine of 30 organists compared to 5 of 30 pianists and controls reported ankle sprains in their medical history. Pianists had a significant increased flexion of both ankle joints compared to organists (p≤0.01) and increased flexion of the right ankle joint compared to controls (p=0.02). The positional sense test and postural balance control showed no significant differences among groups. The peroneal reaction time of the right peroneus longus muscle was significantly increased in pianists compared to controls (p=0.008). CONCLUSIONS: Organists have shown a high incidence of ankle sprains. Despite their extensive work-related use of the ankle joints, organists have neither increased functional ankle stability nor increased ROM of their ankle joints in comparison to controls. Pianists have increased flexion of the ankle joint, perhaps due to the exclusive motion of extension and flexion while using the pedals. To minimize injuries of the ankle and improve functional ankle stability as well as balance control, proprioceptive exercises of the ankle in daily training programs are recommended.

scholarly journals Validity and reliability of standing balance control measurement on the left unilateral spatial neglect model

2021 ◽  
Vol 15 (3) ◽  
pp. 167-179
Author(s):  
Abdul C. Meidian ◽  
Song Yige ◽  
Syahmirza I. Lesmana ◽  
Kazu Amimoto
Keyword(s):  
Postural Balance ◽  
Balance Control ◽  
Standing Balance ◽  
Spatial Neglect ◽  
Validity And Reliability ◽  
Control Measurement ◽  
Unilateral Spatial Neglect ◽  
Head Mounted Display ◽  
The Right ◽  
Healthy Participants

BACKGROUND: The present study developed a head-mounted display with the visual direction of a web camera modified to the right as a left unilateral spatial neglect (USN) model with respect to postural balance control. AIM: We aimed to estimate the validity and reliability of center of pressure (CoP) measurements in static standing balance (SSB) and dynamic standing balance (DSB) of healthy participants were using the USN model and to examine whether this model's use influenced postural balance control. METHOD: A portable CoP force plate was used to quantify postural balance control in 64 healthy participants as the model. The CoP displacement of the non-USN and USN models in the medial-lateral (ML) and anterior-posterior (AP) planes, CoP length, and bilateral load ratio in SSB and DSB to the right (R) and left (L) were evaluated. RESULTS: Regression analysis indicated that most CoP measurements have excellent concurrent validity. Bland–Altman plots showed good agreement between the non-USN and USN models in the CoP measurements. Test-retest reliability estimation between two times measurements varied in the frontal and sagittal planes. A Comparison of the results demonstrated that the CoP-AP and CoP length changed (-1.40% and 7.67%, respectively) significantly in SSB (P<0.05). Moreover, the CoP-AP changed very significantly in DSB-R and DSB-L (-1.50% and 1.86%, respectively) in opposite directions (P<0.01) when the subjects performed as the model. CONCLUSION: CoP measurements are valid and reliable to quantify standing balance control in both non-USN and USN models that appear to modulate changes in postural adaptation and adjustment.

DETERMINATION OF THE DEPENDENCES OF THE ANGLES IN THE JOINTS OF THE LOWER EXTREMITIES OF A HUMAN DURING GAIT

2021 ◽  
Vol 1 (7) ◽  
pp. 33-37
Author(s):  
D.D. Yakimova ◽  
◽  
E.V. Kozhemyakina ◽  
V.N. Nikitin ◽  
◽  
...  
Keyword(s):  
Ankle Joint ◽  
Lower Extremities ◽  
Individual Characteristics ◽  
Human Gait ◽  
Joint Injury ◽  
Lateral Projection ◽  
Ankle Joints ◽  
The Subject ◽  
The Right

The study of human gait is of interest in determining its individual characteristics that affect the loads experienced by the joints of the lower extremities. To analyze the gait in the lateral projection, an experiment was carried out with placed markers on the subject's body to determine the interarticular angles in the hip, knee and ankle joints. The graphs of the dependences of these angles on time were built, corresponding to a certain phase of the step. It was found that the range of changes in the angle in the left ankle joint in the subject was significantly different from the dependence obtained for the right joint. Based on the subject's anamnesis, we associate these differences with the fact that there was an ankle joint injury that affected the condition of the ligamentous apparatus of the joint. In further work, it is proposed to consider a person's gait not only in the lateral, but also in the frontal (anteroposterior) plane to assess all movements in the joints, especially those associated with the abduction of the limbs and the human body from the vertical line on the specified plane.

scholarly journals Effects of Ankle Joint Taping on Postural Balance Control in Stroke Patients

2012 ◽  
Vol 3 (2) ◽  
pp. 446-452 ◽  
Author(s):  
Yang Rae Kim ◽  
Jae Ic Kim ◽  
Yong Youn Kim ◽  
Kwon Young Kang ◽  
Bo Kyoung Kim ◽  
...  
Keyword(s):  
Ankle Joint ◽  
Postural Balance ◽  
Balance Control ◽  
Stroke Patients

Joint Reaction Forces during the Recovery of Postural Balance of Human Body

2005 ◽  
Vol 297-300 ◽  
pp. 2308-2313
Author(s):  
Min Jwa Seo ◽  
Hyeon Ki Choi
Keyword(s):  
Ankle Joint ◽  
Human Body ◽  
Postural Balance ◽  
Soft Tissues ◽  
Balance Control ◽  
Camera Motion ◽  
Joint Reaction Forces ◽  
Reaction Forces ◽  
Angular Displacements ◽  
Joint Reaction

The purpose of this study was to calculate three dimensional angular displacements, moments and joint reaction forces (JRF) of the ankle joint during the waist pulling, and to assess the ankle JRF according to different perturbation modes and different levels of perturbation magnitude. Ankle joint model was assumed 3-D ball and socket joint which is capable of three rotational movements. We used 6 camera motion analysis system, force plate and waist pulling system. Two different waist pulling systems were adopted for forward sway with three magnitudes each. From motion data and ground reaction forces, we could calculate 3-D angular displacements, moments and JRF during the recovery of postural balance control. From the experiment using mass-falling perturbation, joint moments were larger than those from the experiment with milder perturbation using air cylinder pulling system. However, joint reaction forces were similar nevertheless the difference in joint moment. From the results, we could conjecture that the human body employs different strategies to protect joints by decreasing joint reaction forces, like using the joint movements or compensating JRF by distributing the forces on surrounding soft tissues. The results of this study provide us important insights for understanding the relationship between balance control and ankle injury mechanism.

scholarly journals Ankle muscle responses during perturbed walking with blocked ankle joints

2019 ◽  
Vol 121 (5) ◽  
pp. 1711-1717 ◽  
Author(s):  
Mark Vlutters ◽  
Edwin H. F. van Asseldonk ◽  
Herman van der Kooij
Keyword(s):  
Ankle Joint ◽  
Balance Control ◽  
Muscle Length ◽  
Joint Rotation ◽  
Long Latency ◽  
Ankle Joints ◽  
Ankle Foot Orthoses ◽  
Ankle Muscle ◽  
Length Changes ◽  
Muscle Responses

The ankle joint muscles can contribute to balance during walking by modulating the center of pressure and ground reaction forces through an ankle moment. This is especially effective in the sagittal plane through ankle plantar- or dorsiflexion. If the ankle joints were to be physically blocked to make an ankle strategy ineffective, there would be no functional contribution of these muscles to balance during walking, nor would these muscles generate afferent output regarding ankle joint rotation. Consequently, ankle muscle activation for the purpose of balance control would be expected to disappear. We have performed an experiment in which subjects received anteroposterior pelvis perturbations during walking while their ankle joints could not contribute to the balance recovery. The latter was realized by physically blocking the ankle joints through a pair of modified ankle-foot orthoses. In this article we present the lower limb muscle activity responses in reaction to these perturbations. Of particular interest are the tibialis anterior and gastrocnemius medialis muscles, which could not contribute to the balance recovery through the ankle joint or encode muscle length changes caused by ankle joint rotation. Yet, these muscles showed long-latency responses, ~100 ms after perturbation onset. The response amplitudes were dependent on the perturbation magnitude and direction, as well as the state of the leg. The results imply that ankle muscle responses can be evoked without changes in proprioceptive information of those muscles through ankle rotation. This suggest a more centralized regulation of balance control, not strictly related to the ankle joint kinematics. NEW & NOTEWORTHY Walking human subjects received forward-backward perturbations at the pelvis while wearing “pin-shoes,” a pair of modified ankle-foot orthoses that physically blocked ankle joint movement and reduced the base of support of each foot to a single point. The lower leg muscles showed long-latency perturbation-dependent activity changes, despite having no functional contributions to balance control through the ankle joint and not having been subjected to muscle length changes through ankle joint rotation.

Osteochondral Lesions of the Ankle Joint in Professional Soccer Players

2014 ◽  
Vol 7 (6) ◽  
pp. 522-528 ◽  
Author(s):  
Victor Valderrabano ◽  
Alexej Barg ◽  
Abdulhameed Alattar ◽  
Martin Wiewiorski
Keyword(s):  
Ankle Joint ◽  
Case Series ◽  
Collagen Matrix ◽  
Treatment Method ◽  
Osteochondral Lesions ◽  
Ankle Sprains ◽  
Level Of Evidence ◽  
Treatment Techniques ◽  
Professional Soccer ◽  
The Right

Acute and recurrent ankle sprains and other trauma to the ankle joint are common injuries in soccer and can be accompanied by or result in osteochondral lesions of the ankle joint, majorly of the talus. Conservative treatment frequently fails. Several operative treatment techniques exist; however, the choice of the right procedure is difficult due to lack of literature with a high level of evidence. We present our treatment method for acute and chronic ankle osteochondral lesions with cystic formation approached by a new surgical technique combining bone plasty and a collagen matrix (autologous matrix-induced chondrogenesis). Levels of Evidence: Therapeutic, Level IV: Case series

The Effects of Muscle Forces on Ankle Joint Kinetics during Postural Balance Control

2006 ◽  
Vol 326-328 ◽  
pp. 871-874
Author(s):  
Hyeon Ki Choi ◽  
Min Jwa Seo ◽  
Ja Choon Koo ◽  
Hyeon Chang Choi ◽  
Won Hak Cho
Keyword(s):  
Ankle Joint ◽  
Postural Balance ◽  
Force Measurement ◽  
Balance Control ◽  
Linear Optimization ◽  
Reaction Force ◽  
Three Dimensional ◽  
Linear Programs ◽  
Muscle Forces ◽  
Joint Kinetics

We assessed the effects of muscle forces on ankle joint kinetics during postural balance control of human boy. Nine male subjects (mean age of 25.8 yrs) participated in the experiment. An ankle joint model assumed ball and socket joint was used, which was capable of three dimensional rotations. A six-camera VICON system was used for motion analysis. Waist pulling system and force platform were adopted for forward sway and GRF (ground reaction force) measurement. We used linear optimization programs to calculate the variation of muscle forces and angular displacements of shank and foot segments. With the experimental data and linear programs, we could calculate joint reaction forces, and bone-on-bone forces. The results presented in this study give us the insights to understand the roles of lower limb muscles during postural balance control and ankle injury mechanism.

scholarly journals Lateralization of attention in adults with ADHD: Evidence of pseudoneglect

2020 ◽  
Vol 63 (1) ◽  
Author(s):  
Bartosz Helfer ◽  
Stefanos Maltezos ◽  
Elizabeth Liddle ◽  
Jonna Kuntsi ◽  
Philip Asherson
Keyword(s):  
Reaction Time ◽  
Visual Field ◽  
Reaction Times ◽  
Study Participant ◽  
Reaction Time Task ◽  
Right Visual Field ◽  
Time Variability ◽  
Incentive Condition ◽  
Reaction Time Variability ◽  
The Right

Abstract Background. We investigated whether adults with attention-deficit/hyperactivity disorder (ADHD) show pseudoneglect—preferential allocation of attention to the left visual field (LVF) and a resulting slowing of mean reaction times (MRTs) in the right visual field (RVF), characteristic of neurotypical (NT) individuals —and whether lateralization of attention is modulated by presentation speed and incentives. Method. Fast Task, a four-choice reaction-time task where stimuli were presented in LVF or RVF, was used to investigate differences in MRT and reaction time variability (RTV) in adults with ADHD (n = 43) and NT adults (n = 46) between a slow/no-incentive and fast/incentive condition. In the lateralization analyses, pseudoneglect was assessed based on MRT, which was calculated separately for the LVF and RVF for each condition and each study participant. Results. Adults with ADHD had overall slower MRT and increased RTV relative to NT. MRT and RTV improved under the fast/incentive condition. Both groups showed RVF-slowing with no between-group or between-conditions differences in RVF-slowing. Conclusion. Adults with ADHD exhibited pseudoneglect, a NT pattern of lateralization of attention, which was not attenuated by presentation speed and incentives.

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