scholarly journals FEATURES OF JOINT MOBILITY IN SKIERS AND SKATERS

2019 ◽  
Vol 19 (1) ◽  
pp. 29-35
Author(s):  
A Postnikova ◽  
Yu Potekhina ◽  
A Kurnikova ◽  
E Tregubova ◽  
D Mokhov
Keyword(s):  
Wrist Joint ◽  
Plantar Flexion ◽  
High Amplitude ◽  
Joint Mobility ◽  
Wrist Flexion ◽  
Flexion Extension ◽  
Athletic Shoes ◽  
Ambiguous Effect ◽  
Nonparametric Statistical ◽  
Flexion And Extension

Aim. Different sports have an ambiguous effect on joint mobility. This article deals with identifying the characteristics of limb joint mobility in skiers and skaters. Materials and methods. 46 athletes (27 skiers and 19 skaters) aged 18–24 participated in the study. All athletes had no complaints regarding their musculoskeletal system. The volume of movements in limb joints was measured with a goniometer. When measuring the angles of flexion and extension of the wrist, as well as plantar flexion and extension, the amplitude was estimated both in active and passive motion. The data obtained were processed with Statistica 10.0 application package and nonparametric statistical methods. Results. In all parameters of the wrist joint (except for passive flexion), statistically significant greater mobility was revealed in skiers (p < 0.0001). The amplitude of active knee flexion was prevalent in skaters (p < 0.0001). Plantar flexion / extension (both active and passive) was also higher in skaters (p < 0.0001) than in skiers. The function of the ankle joint in skaters bears the imprint of a stable motor specialization, which is manifested in the extremely high amplitude of foot extension. In both groups, the angle of wrist flexion, the angle of retraction in the hip joint and the angle of plantar flexion exceeded the norms. This is because these joints are the most used both in skiers and skaters. Conclusions. The features of joint mobility are associated with specific athletic shoes and locomotor specialization for skiers and skaters. Skiers demonstrate the increased mobility of wrist joints, while skaters possess the increased mobility of the knee and ankle.

Rebalancing the tetraplegic wrist using extensor carpi ulnaris-tenodesis

2012 ◽  
Vol 38 (1) ◽  
pp. 22-28 ◽  
Author(s):  
C. Reinholdt ◽  
J. Fridén
Keyword(s):  
Grip Strength ◽  
Motion Correction ◽  
Wrist Joint ◽  
Cervical Spinal Cord ◽  
Wrist Flexion ◽  
Extensor Carpi Ulnaris ◽  
Flexion Extension ◽  
Cord Injury ◽  
Joint Flexion ◽  
Flexion And Extension

Patients with cervical spinal cord injury and tetraplegia often present with a radial deviation deformity of the wrist owing to impaired active wrist flexion and extension. Tenodesis of the extensor carpi ulnaris can help optimize grip strength. The purpose of the study was to compare reconstruction of the grip with and without extensor carpi ulnaris-tenodesis, as well as evaluating the outcome of the procedure. The grip strength of the group with tenodesis of the extensor carpi ulnaris was twice as strong as of the group without the tenodesis and with similar wrist joint flexion–extension range of motion. Correction of the wrist deformity enables a more ergonomic use of the hand. This may also help prevent shoulder pain, which is common among patients with tetraplegia.

Activity of precentral neurons during torque-triggered hand movements in awake primates

1979 ◽  
Vol 57 (2) ◽  
pp. 174-184 ◽  
Author(s):  
Y. C. Wong ◽  
H. C. Kwan ◽  
J. T. Murphy
Keyword(s):  
Wrist Joint ◽  
Wrist Flexion ◽  
Somatosensory Stimulation ◽  
Sensory Stimuli ◽  
Neuronal Populations ◽  
Supportive Role ◽  
Flexion Extension ◽  
Cortical Responses ◽  
Early Portion ◽  
Temporally Correlated

In monkeys performing a handle-repositioning task involving primarily wrist flexion–extension (F–E) movements after a torque perturbation was delivered to the handle, single units were recorded extracellularly in the contralateral precentral cortex. Precentral neurons were identified by passive somatosensory stimulation, and were classified into five somatotopically organized populations. Based on electromyographic recordings, it was observed that flexors and extensors about the wrist joint were specifically involved in the repositioning of the handle, while many other muscles which act at the wrist and other forelimb joints were involved in the task in a supportive role. In precentral cortex, all neuronal responses observed were temporally correlated to both the sensory stimuli and the motor responses. Visual stimuli, presented simultaneously with torque perturbations, did not affect the early portion of cortical responses to such torque perturbations. In each of the five somatotopically organized neuronal populations, task-related neurons as well as task-unrelated ones were observed. A significantly larger proportion of wrist (F–E) neurons was related to the task, as compared with the other, nonwrist (F–E) populations. The above findings were discussed in the context of a hypothesis for the function of precentral cortex during voluntary limb movement in awake primates. This hypothesis incorporates a relationship between activities of populations of precentral neurons, defined with respect to their responses to peripheral events at or about single joints, and movements about the same joint.

scholarly journals Modified Osteotomy for Treatment of Forearm Deformities (Masada IIb) in Hereditary Multiple Osteochondromas: A Retrospective Review

2021 ◽  
Author(s):  
Ge Yan ◽  
Guoxin Nan
Keyword(s):  
Distraction Osteogenesis ◽  
External Fixator ◽  
Wrist Joint ◽  
Elbow Flexion ◽  
Wrist Flexion ◽  
Ilizarov External Fixator ◽  
Multiple Osteochondromas ◽  
Before And After ◽  
Ulnar Lengthening ◽  
Flexion And Extension

Abstract Purpose: Approximately 30% of patients with hereditary multiple osteochondromas (HMO) have forearm deformity and dysfunction. The aim of this retrospective study was to review our experience with the surgical treatment of children with HMO and Masada IIb forearm deformities.Methods: Data of eight children treated for HMO Masada IIb forearm deformity at our hospital between 2015 and 2019 were collected from the hospital records and retrospectively reviewed. All patients underwent ulnar lengthening by distraction osteogenesis using either the Orthofix or Ilizarov external fixator. Range of movements at the elbow and wrist joints, and forearm supination/pronation, before and after the operation were recorded. Radiographs were evaluated by the Fogel method, and wrist joint function by the Krimmer method.Results: Follow-up radiographs showed significant improvement in relative ulnar shortening after treatment (pre-operative 9.23 ± 5.21 mm; post-operative 0.33 ± 4.13 mm). Changes in radial articular angle (pre-operative 33.55° ± 3.88° to 32.78° ± 6.57°) and carpal slip (pre-operative 45.00% ± 19.09%; post-operative 43.13% ± 16.68%) were not significant. Elbow flexion and extension, wrist flexion and extension, ulnar and radial deviation at wrist, and forearm rotation were significantly improved after surgery. Wrist function was graded as excellent in seven patients and as good in one patient. One patient treated with the Ilizarov external fixator had poor radial head reduction.Conclusion: Ulnar lengthening with distraction osteogenesis is an effective treatment for HMO Masada IIb deformities. The optimum site for ulnar osteotomy appears to be at the proximal one-third to one-fourth of the ulna.

Effect of Wrist Joint Angle on the Examination of Hoffmann's Sign

2021 ◽  
Author(s):  
Guan Shi ◽  
Hai Tang ◽  
Jianlin Shan
Keyword(s):  
Cervical Spondylotic Myelopathy ◽  
Joint Angle ◽  
Wrist Joint ◽  
Control Group ◽  
Wrist Flexion ◽  
Significant Difference ◽  
Palmar Flexion ◽  
Flexion And Extension

Abstract Objective To study the effect of different wrist flexion and extension angles on the results of Hoffmann’s sign.Methods Thirty-seven patients with cervical spondylotic myelopathy and fifty objectives as control group were examinated at 15° palmar flexion, 0° neutral, 30° back extension, and 60° back extension of the wrist joint to observe Hoffmann's sign.ResultsThe patients with cervical spondylotic myelopathy did not present significantly different results of Hoffmann’s sign at 0° neutral, 30° back extension, and 60° back extension, but significantly different at 15° palmar flexion (P<0.05). In control group, there is no significant difference at 15° palmar flexion, 0° neutral, 30° back extension, but significantly different at 60° back extension (p<0.05).ConclusionThe different angles of wrist flexion and extension present a significant impact on the results of Hoffmann’s sign examination. For the patients with cervical spondylotic myelopathy, it is reliable to test Hoffmann’s sign at 30° wrist back extension.

The Effect of Simultaneous Grip on Wrist Flexion/Extension Strength

2007 ◽  
Vol 51 (18) ◽  
pp. 1215-1218
Author(s):  
Na Jin Seo ◽  
Thomas J. Armstrong ◽  
Kathryn L. Dannecker
Keyword(s):  
Wrist Flexion ◽  
Wrist Extension ◽  
Rehabilitation Programs ◽  
Right Hand ◽  
Flexion Extension ◽  
Flexion Strength ◽  
Maximum Grip ◽  
Flexion And Extension

This study quantifies the effect of a simultaneous grip on wrist strength. It was hypothesized that wrist flexion strength increases with an increasing grip and wrist extension strength decreases with an increasing grip. Twelve subjects performed maximum wrist flexion and extension exertions with a different level of simultaneous grip – minimum, preferred, and maximum. Wrist flexion strength increased 34% and wrist extension strength decreased 10% from minimum to maximum grip. This shows that measure of wrist strength for assessing strength capabilities or the efficacy of hand surgeries or rehabilitation programs requires control of finger flexor activities to ensure consistent and relevant results. When opening a bottle in an outward direction (right hand thread), wrist extension strength may be significantly limited by a simultaneous grip due to muscle antagonism. When twisting a fragile or uncomfortable object, reduced finger flexor activities can limit wrist flexion strength.

scholarly journals Classification of the Angular Position During Wrist Flexion-extension Based on EMG Signals

2021 ◽  
Vol 25 ◽  
Author(s):  
María Alexandra Fajardo-Perdomo ◽  
Verónica Guardo-Gómez ◽  
Alvaro David Orjuela-Cañón ◽  
Andrés Felipe Ruiz-Olaya
Keyword(s):  
Pattern Recognition ◽  
Wrist Joint ◽  
Angular Position ◽  
Recognition Algorithm ◽  
Ar Model ◽  
Model Parameters ◽  
Wrist Flexion ◽  
Pattern Recognition Algorithm ◽  
Time Frequency ◽  
Flexion Extension

Objective: To evaluate a group of features in a myoelectric pattern recognition algorithm to differentiate between five angular positions of the wrist during flexion-extension movements. Materials and Methods: An experimental configuration was made to capture the EMG and wrist joint angle related to flexion-extension movements. After that, a myoelectric pattern recognition algorithm based on a multilayer perceptron artificial neural network (ANN) was implemented. Three different groups were used: Time domain characteristics, autoregressive (AR) model parameters, and representation of time frequency using Wavelet transform (WT). Results and Discussion: The experimental results of 10 healthy subjects indicate that the coefficients of the AR models offer the best parameters for classification, with a differentiation rate of 78 % for the five angular positions studied. The combination of frequency and time frequency resulted in a differentiation rate that reached 82 %. Conclusions: An algorithm based on pattern recognition of EMG signals was used to carry out a comparative study of groups of features that allow for the differentiation of the angular position of the wrist in terms of flexion-extension movements. The method has the potential for application in the field of rehabilitation engineering to detect the user’s movement intent.

THE THREE-DIMENSIONAL MOVEMENT CORRELATIONS BETWEEN ELBOW AND WRIST JOINT AND ANTHROPOMETRIC DETERMINANTS

2018 ◽  
Vol 18 (02) ◽  
pp. 1850013 ◽  
Author(s):  
WEI WANG ◽  
DONGMEI WANG ◽  
CHENGHUI LAI
Keyword(s):  
Multiple Regression ◽  
Wrist Joint ◽  
Three Dimensional ◽  
Elbow Flexion ◽  
Wrist Flexion ◽  
Factors Affecting ◽  
Bivariate Correlation ◽  
Flexion Extension ◽  
Joint Motions ◽  
The Relationship

This study aimed to investigate three-dimensional (3D) kinematic characteristics of elbow and wrist motions, the relationship between them, and the anthropometric factors affecting them. Using motion capture system, this study measured and calculated the 3D angles of elbow flexion/extension, elbow pronation/supination, wrist flexion/extension, and wrist adduction/abduction of 40 healthy young adults. The study measured nine anthropometric variables and used unpaired [Formula: see text]-tests to assess gender difference. Also, bivariate correlation tests and step-wise multiple regression analyses were performed between joint ranges and anthropometric variables, as well as different joint motions. Results showed two opposite patterns occurred during elbow flexion/extension. The study found a correlation between the range of elbow flexion/extension and the range of elbow pronation/supination that occurred during elbow flexion/extension. Additionally, the study tested joint correlations between the four joint motions. Finally, the study established bivariate and multiple regression relationships between range of elbow motions and anthropometric factors. This research presented an unrecognized pattern of 3D elbow flexion/extension, and associations between various anthropometric factors and different joint motions. These findings can contribute to the design of orthosis of upper extremities and the rehabilitation of joint mobility.

scholarly journals Improved Outside-In Suture through the Joint Capsule to Repair the Palmer I-B Triangular Fibrocartilage Complex Superficial Injury

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Tonglong Xu ◽  
Xiaoyun Pan ◽  
Jingyi Mi
Keyword(s):  
Wrist Joint ◽  
Joint Capsule ◽  
Triangular Fibrocartilage Complex ◽  
Type I ◽  
Dash Score ◽  
Wrist Flexion ◽  
Joint Function ◽  
Triangular Fibrocartilage ◽  
Flexion And Extension

Background. The treatment of type I-B triangular fibrocartilage complex superficial injury is always a challenge to orthopedists. The traditional outside-in suture method often causes a risk of nervous irritation. We designed a modified outside-in suture through the joint capsule to repair the Palmer I-B triangular fibrocartilage complex superficial injury. Methods. From December 2014 to December 2018, we retrospectively collected the medical records of 18 patients in our hospital who used the modified outside-in suture through the joint capsule to repair type I-B triangular fibrocartilage complex superficial injury. Among them, there were 12 males and 6 females, with an average age of 36.2 years. There were 6 cases on the left side and 12 cases on the right side. Record the healing time of all patients after surgery and the occurrence of related complications, and record the pain visual analogue scale (VAS), grip strength, wrist flexion and extension, radioulnar deviation and forearm rotation range of motion, modified Mayo wrist joint function score, and disability of arm-shoulder-hand (DASH) score before operation and at the last follow-up. Results. One patient was lost to follow-up, and a total of 17 patients received the final follow-up. Patients were followed up for 24 to 36 months, with an average of 29.6 ± 3.0 months. No wound infection, nerve damage, or irritation occurred after the operation. At the last follow-up, 15 cases of wrist pain disappeared completely, and 2 cases had mild discomfort during exercise. At the last follow-up, VAS decreased from 3.8 ± 0.7 points before operation to 0.8 ± 0.7 points ( P < 0.05 ); grip strength increased from 15.1 ± 3.1  kg before operation to 23.2 ± 1.5  kg ( P < 0.05 ); wrist flexion and extension, radioulnar deflection, and forearm rotational mobility increased from 116.3 ± 2.2 °, 37.0 ± 3.5 °, and 141.6 ± 2.2 ° before operation to 117.2 ± 2.5 ° ( P < 0.05 ), 38.9 ± 3.0 ° ( P < 0.05 ), and 142.4 ± 1.9 ° ( P < 0.05 ), respectively; the modified Mayo wrist joint function score increased from 66.1 ± 3.6 points to 82.5 ± 3.9 points ( P < 0.05 ), of which 10 cases were excellent, 5 cases were good, 2 cases were fair, and the excellent and good rate was 88.2%; DASH score improved from 37.0 ± 5.7 points preoperatively to 8.0 ± 2.5 points ( P < 0.05 ). Conclusion. The modified outside-in suture through the joint capsule to repair the superficial injury of Palmer I-B triangular fibrocartilage complex has a good clinical effect and is worthy of clinical widespread promotion.

scholarly journals Modified osteotomy for treatment of forearm deformities (Masada IIb) in hereditary multiple osteochondromas: a retrospective review

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Ge Yan ◽  
Guoxin Nan
Keyword(s):  
Distraction Osteogenesis ◽  
External Fixator ◽  
Wrist Joint ◽  
Elbow Flexion ◽  
Wrist Flexion ◽  
Ilizarov External Fixator ◽  
Multiple Osteochondromas ◽  
Before And After ◽  
Ulnar Lengthening ◽  
Flexion And Extension

Abstract Purpose Approximately 30% of patients with hereditary multiple osteochondromas (HMO) have forearm deformity and dysfunction. The aim of this retrospective study was to review our experience with the surgical treatment of children with HMO and Masada IIb forearm deformities. Methods Data of eight children treated for HMO Masada IIb forearm deformity at our hospital between 2015 and 2019 were collected from the hospital records and retrospectively reviewed. All patients underwent ulnar lengthening by distraction osteogenesis using either the Orthofix or Ilizarov external fixator. Range of movements at the elbow and wrist joints, and forearm supination/pronation, before and after the operation were recorded. Radiographs were evaluated by the Fogel method, and wrist joint function by the Krimmer method. Results Follow-up radiographs showed significant improvement in relative ulnar shortening after treatment (pre-operative 9.23 ± 5.21 mm; post-operative 0.33 ± 4.13 mm). Changes in radial articular angle (pre-operative 33.55° ± 3.88° to 32.78° ± 6.57°) and carpal slip (pre-operative 45.00% ± 19.09%; post-operative 43.13% ± 16.68%) were not significant. Elbow flexion and extension, wrist flexion and extension, ulnar and radial deviation at wrist, and forearm rotation were significantly improved after surgery. Wrist function was graded as excellent in seven patients and as good in one patient. One patient treated with the Ilizarov external fixator had poor radial head reduction. Conclusion Ulnar lengthening with distraction osteogenesis is an effective treatment for HMO Masada IIb deformities. The optimum site for ulnar osteotomy appears to be at the proximal one-third to one-fourth of the ulna.

scholarly journals Wrist Position Sense in Two Dimensions: Between-Hand Symmetry and Anisotropic Accuracy Across the Space

2021 ◽  
Vol 15 ◽  
Author(s):  
Giulia A. Albanese ◽  
Michael W. R. Holmes ◽  
Francesca Marini ◽  
Pietro Morasso ◽  
Jacopo Zenzeri
Keyword(s):  
Wrist Joint ◽  
Position Sense ◽  
Two Dimensions ◽  
Joint Position ◽  
Wrist Flexion ◽  
Ulnar Deviation ◽  
Target Direction ◽  
Wrist Position ◽  
Flexion Extension ◽  
Combined Movements

A deep investigation of proprioceptive processes is necessary to understand the relationship between sensory afferent inputs and motor outcomes. In this work, we investigate whether and how perception of wrist position is influenced by the direction along which the movement occurs. Most previous studies have tested Joint Position Sense (JPS) through 1 degree of freedom (DoF) wrist movements, such as flexion/extension (FE) or radial/ulnar deviation (RUD). However, the wrist joint has 3-DoF and many activities of daily living produce combined movements, requiring at least 2-DoF wrist coordination. For this reason, in this study, target positions involved movement directions that combined wrist flexion or extension with radial or ulnar deviation. The chosen task was a robot-aided Joint Position Matching (JPM), in which blindfolded participants actively reproduced a previously passively assumed target joint configuration. The JPM performance of 20 healthy participants was quantified through measures of accuracy and precision, in terms of both perceived target direction and distance along each direction of movement. Twelve different directions of movement were selected and both hands tested. The left and right hand led to comparable results, both target extents and directions were differently perceived according to the target direction on the FE/RUD space. Moreover, during 2-DoF combined movements, subjects’ perception of directions was impaired when compared to 1-DoF target movements. In summary, our results showed that human perception of wrist position on the FE/RUD space is symmetric between hands but not isotropic among movement directions.

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