scholarly journals Comparison of Shoulder Neuromuscular Control in Overhead Athletes with and without Shoulder Hypermobility

2020 ◽  
Vol 29 (3) ◽  
pp. 316-323
Author(s):  
Sungwoo Kang ◽  
Kwanglae Kim
Keyword(s):  
Range Of Motion ◽  
Shoulder Joint ◽  
Essential Role ◽  
Neuromuscular Control ◽  
Position Sense ◽  
Joint Position Sense ◽  
Normal Range ◽  
Overhead Athletes ◽  
Target Angle ◽  
Wide Range

PURPOSE: A wider range of motion of shoulder joint is necessary for explosive throwing performance and the increase of the range of motion by repetitive throwing is inevitable. The wide range of motion is related with the instability of the joint. Neuromuscular control plays an essential role in stabilizing the joint. However, when the joint becomes hypermobile, how neuromuscular control was affected was not clear. The purpose of this study was to compare shoulder neuromuscular control of overhead shoulder athletes and identify the influence of hypermobility on it.METHODS: Total 24 subjects (hypermobility group (HMG); 12 athletes, normal range group (CON); 12 athletes) were recruited in this research. To assess shoulder neuromuscular functions, joint position sense (JPS), the threshold of detection to passive motion (TTDPM), and force reproduction (FR) were measured.RESULTS: In active JPS at HMG was greater than CON at the 90% target angle, (p<.05). In passive JPS, HMG showed lower JPS compared to CON at the 50% target angle (p<.05). In FR, HMG was lower than CON in internal rotation (p<.05). In relationship test, hypermobility was negatively correlated with active JPS (p<.05).CONCLUSIONS: It was found that the hypermobile shoulder has greater neuromuscular control compared normal range shoulder to compensate for the hypermobility and active sub-system plays a crucial role in the neuromuscular control of the shoulder joint. Thus, it is recommended that neuromuscular training should be considered in training program for overhead athletes with hypermobile shoulder.

College Pitchers Demonstrate Directional Differences in Shoulder Joint Position Sense Compared With Controls

2018 ◽  
Vol 27 (4) ◽  
pp. 301-305 ◽  
Author(s):  
John Andrew Badagliacco ◽  
Andrew Karduna
Keyword(s):  
Athletic Training ◽  
Shoulder Joint ◽  
Constant Error ◽  
External Rotation ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Overhead Athletes ◽  
Target Angle ◽  
Increased Risk

Context: The relationship between overhead throwing and its effect on proprioception is not well understood. It is important to gain a better understanding of how these are related, to protect overhead athletes from an increased risk of injury. Objective: To investigate proprioceptive alterations in the overhead thrower’s shoulder. Design: Cross-sectional study. Independent variables are limb (dominant and nondominant), group (thrower or control), and target angle. Dependent variables are joint position sense and range of motion. Setting: An orthopedic biomechanics lab and university athletic training facility. Participants: Twelve Division I baseball pitchers and 13 nonthrowing control subjects. Intervention: Shoulder proprioception was assessed using an active joint repositioning task administered with an iPod Touch. Main Outcome Measure: Root mean square error and constant error of repositioning angles were used to assess accuracy and directional patterns, respectively. Results: Both groups demonstrated significantly higher joint acuity at the 80° external rotation target angle compared with 60° (1.5° [0.5°], P = .01). There were no differences in accuracy between groups. Constant error revealed differing repositioning patterns between limbs for the pitchers and also between groups for the dominant side. Although the throwing shoulder overshot the target angles by 0.4°, all nonthrowing shoulders undershot by an average of 2.7°. Conclusions: There is no difference in shoulder joint position sense accuracy between throwers and nonthrowers, although both groups display increased accuracy closer to their end range of external rotation. The throwing shoulder demonstrates a different repositioning pattern, overshooting the desired target angle, while all other shoulders undershoot.

Immediate effects of thoracic manipulation on cervical joint position sense in individuals with mechanical neck pain: A randomized controlled trial

2021 ◽  
pp. 1-9
Author(s):  
Emin Ulas Erdem ◽  
Banu Ünver ◽  
Eda Akbas ◽  
Gizem Irem Kinikli
Keyword(s):  
Neck Pain ◽  
Range Of Motion ◽  
Position Sense ◽  
Joint Position Sense ◽  
Position Error ◽  
Cervical Region ◽  
Joint Position ◽  
Cervical Range Of Motion ◽  
Arm Pain ◽  
Neck Function

BACKGROUND: Performing thoracic manipulations for neck pain can result in immediate improvements in neck function. OBJECTIVE: The aim of this study was to investigate the immediate effects of thoracic manipulation on cervical joint position sense and cervical range of motion in individuals with chronic mechanical neck pain. METHODS: Eighty male volunteers between 18–25 years and having chronic or recurrent neck or shoulder pain of at least 3 months duration with or without arm pain were randomized into two groups: Thoracic Manipulation Group (TMG:50) and Control Group (CG:30), with a pretest-posttest experimental design. The TMG was treated with thoracic extension manipulation while the CG received no intervention. Cervical joint position error and cervical range of motion of the individuals were assessed at baseline and 5 minutes later. RESULTS: There was no difference in demographic variables such as age (p= 0.764), Body Mass Index (p= 0.917) and Neck Pain Disability Scale (NPDS) scores (p= 0.436) at baseline outcomes between TMG and CGs. Joint position error outcomes between the two groups following intervention were similar in all directions at 30 and 50 degrees. Differences in range of motion following intervention in neck flexion (p< 0.001) and right rotation (p= 0.004) were higher in TMG compared to CG. CONCLUSIONS: A single session of thoracic manipulation seems to be inefficient on joint position sense in individuals with mild mechanical neck pain. However, thoracic manipulation might be an effective option to increase flexion and rotation of the cervical region as an adjunctive to treatment.

Evaluation of proprioception in denervated and healthy wrist joints

2020 ◽  
Vol 45 (4) ◽  
pp. 408-413
Author(s):  
Susanne Rein ◽  
Jochen Winter ◽  
Thomas Kremer ◽  
Frank Siemers ◽  
Ursula Range ◽  
...  
Keyword(s):  
Neuromuscular Control ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Flexor Carpi Ulnaris ◽  
Proprioceptive Deficit ◽  
Extensor Carpi Radialis ◽  
Wrist Denervation ◽  
Force Sense ◽  
Reflex Time

We recruited 25 patients after complete wrist denervation and 60 healthy adults to investigate conscious and unconscious proprioception of the wrist. Ipsi- and contralateral joint-position sense, force sense, and wrist reflexes were measured. The latter were triggered by a trapdoor, recording electromyographic signals from the extensor carpi radialis brevis, extensor carpi ulnaris, flexor carpi radialis, and flexor carpi ulnaris muscles. No significant differences were found for joint position sense, force sense, and wrist reflexes between both groups, except for reflex time of the flexor carpi ulnaris after denervation of the left wrist as compared with the left flexor carpi ulnaris in controls or in right operated wrists. At a mean follow-up of 32 months (range 8 to 133), we found no proprioceptive deficit of the conscious proprioceptive qualities of joint position sense, force sense, and the unconscious proprioceptive neuromuscular control of wrist reflex time for most muscles after complete wrist denervation. We conclude from this study that complete wrist denervation does not affect the proprioceptive senses of joint position, force sense, and reflex time of the wrist.

scholarly journals Shoulder Joint Position Sense in Thoracic Outlet Syndrome

2021 ◽  
Vol 11 (01) ◽  
pp. 178
Author(s):  
C. Sayaca ◽  
F. Eyuboglu ◽  
M. Çalık ◽  
H. Guney-Deniz ◽  
T. Fırat ◽  
...  
Keyword(s):  
Shoulder Joint ◽  
Thoracic Outlet Syndrome ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position

Effect of Load, Angle, and Contraction Type on Clinically Assessed Knee Joint Position Sense

2021 ◽  
pp. 1-6
Author(s):  
Adam L. Haggerty ◽  
Janet E. Simon ◽  
Dustin R. Grooms ◽  
Jeffrey A. Russell
Keyword(s):  
Body Position ◽  
Eccentric Contraction ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Active Joint ◽  
Concentric Contraction ◽  
Target Angle ◽  
Significant Difference ◽  
Contraction Type

Context: Proprioception is an individual’s awareness of body position in 3-dimensional space. How proprioceptive acuity changes under varying conditions such as joint position, load, and concentric or eccentric contraction type is not well understood. In addition, a limitation of the variety of techniques to assess proprioception is the lack of clinically feasible methods to capture proprioceptive acuity. The purpose of this study was to implement a readily available instrument, a smartphone, in the clinical evaluation of knee active joint position sense and to determine how joint angle, joint loading, and quadriceps contraction type affect an individual’s active joint position sense. Design: Cross-over study. Methods: Twenty healthy, physically active university participants (10 women and 10 men: 21.4 [2.0] y; 1.73 [0.1] m; 70.9 [14.3] kg) were recruited. Individuals were included if they had no neurological disorder, no prior knee surgery, and no recent knee injury. The participants were given a verbal instruction to locate a target angle and then were tasked with reproducing the target angle without visual or verbal cues. An accelerometer application on a smartphone was used to assess the angle to the nearest tenth of a degree. Three variables, each with 2 levels, were analyzed in this study: load (weighted and unweighted), contraction type (eccentric and concentric), and joint position (20° and 70°). A repeated-measures analysis of variance was conducted to assess the within-subjects factors of load, contraction, and position. Results: A significant difference of 0.50° (0.19°) of greater error with eccentric versus concentric contraction (P = .02) type was identified. In addition, a significant interaction was found for contraction × position, with a mean increase in error of 0.98° (0.33°) at the 20° position when contracting eccentrically (P = .03). Conclusions: Contraction type, specifically eccentric contraction at 20°, showed significantly greater error than concentric contraction. This suggests that, during eccentric contractions of the quadriceps, there may be decreased proprioceptive sensitivity compared with concentric contractions.

Effects of proprioceptive training on the incidence of ankle sprain in athletes: systematic review and meta-analysis

2018 ◽  
Vol 32 (12) ◽  
pp. 1581-1590 ◽  
Author(s):  
Gabriela Souza de Vasconcelos ◽  
Anelize Cini ◽  
Graciele Sbruzzi ◽  
Cláudia Silveira Lima
Keyword(s):  
Postural Sway ◽  
Meta Analysis ◽  
Balance Training ◽  
Neuromuscular Control ◽  
Position Sense ◽  
Joint Position Sense ◽  
Control Group ◽  
Controlled Trials ◽  
Ankle Sprains ◽  
Joint Position

Objective: To investigate how dynamic neuromuscular control, postural sway, joint position sense, and incidence of ankle sprain are influenced by balance training in athletes compared with the control group in randomized clinical trials. Data sources: The search strategy included MEDLINE, Physical Therapy Evidence Database, Cochrane Central Register of Controlled Trials, and Latin American and Caribbean Center on Health Sciences Information. Randomized controlled trials (RCTs) were published by June of 2018. Methods: RCTs that evaluate the effectiveness of proprioception in these outcomes: dynamic neuromuscular control, postural sway, joint position, and the incidence of ankle sprains in athletes aged between 18 and 35 years. Two reviewers independently screened the searched records, extracted the data, and assessed risk of bias. The treatment effect sizes were pooled in a meta-analysis using the RevMan 5.2 software. Internal validity was assessed through topics suggested by Cochrane Collaborations. Results: Of the 12 articles included ( n = 1817), eight were in the meta-analysis ( n = 1722). The balance training reduced the incidence of ankle sprains in 38% compared with the control group ( RR: 0.62; 95% CI: 0.43–0.90). In relation to the dynamic neuromuscular control, the training showed increase in the distance of reach in the anterior (0.62 cm, 95% CI: 0.13–1.11), posterolateral (4.22 cm, 95% CI: 1.76–6.68), and posteromedial (3.65 cm, 95% CI: 1.03–6.26) through the Star Excursion Balance test. Furthermore, training seems to improve postural sway and joint position sense. Conclusion: Balance training reduces the incidence of ankle sprains and increases dynamic neuromuscular control, postural sway, and the joint position sense in athletes.

The Efficacy of Modern Technology to Improve Healthy and Injured Shoulder Joint Position Sense

1999 ◽  
Vol 8 (1) ◽  
pp. 10-23 ◽  
Author(s):  
Semyon M. Slobounov ◽  
Shannon T. Poole ◽  
Robert F. Simon ◽  
Elena S. Slobounov ◽  
Jill A. Bush ◽  
...  
Keyword(s):  
Shoulder Joint ◽  
Healthy Subjects ◽  
Position Sense ◽  
Joint Position Sense ◽  
Modern Technology ◽  
Shoulder Abduction ◽  
Joint Position ◽  
Reproduction Task ◽  
Significant Difference ◽  
Visualization Techniques

Assessment and enhancement of joint position sense is an inexact science at best. Anew method of evaluating and improving this sense using motion-tracking technology that incorporates computer visualization graphics was examined. Injured and healthy subjects were evaluated for their abilities to determine shoulder joint position, after abduction, in two tasks. The first was active reproduction of a passively placed angle. The second was visual reproduction of such an angle. A training protocol was added to determine the effectiveness of proprioceptive training in conjunction with 3-D visualization techniques. The primary findings were (a) a significant difference (p= .05) in the level of joint position sense in injured vs. healthy subjects; (b) significantly less accurate reproduction of larger shoulder abduction vs. the smaller movement in the active reproduction task; (c) significantly greater ability to accurately reproduce angles actively vs. visually; and (d) that proprioception training using 3-D visualization techniques significantly increased activeandvisual reproductions of passively placed angles.

Shoulder Joint Position Sense in Injured and Noninjured Judo Athletes

2013 ◽  
Vol 18 (2) ◽  
pp. 29-33 ◽  
Author(s):  
Carly May Green ◽  
Paul Comfort ◽  
Lee Herrington
Keyword(s):  
Outcome Measures ◽  
Shoulder Joint ◽  
External Rotation ◽  
Position Sense ◽  
Joint Position Sense ◽  
Average Error ◽  
Joint Position ◽  
Joint Stability ◽  
Shoulder Injury ◽  
Judo Athletes

Context:A reduction in joint position sense (JPS) is sometimes a consequence of shoulder injury that may adversely affect the ability to maintain dynamic joint stability.Objective:To compare shoulder JPS between previously injured and noninjured judokas.Design:Cohort study.Participants:Twenty-nine noninjured subjects (10.93 ± 3.45 years) and eleven injured subjects (15.09 ± 3.39 years).Main Outcome Measures:JPS was tested at 45° and 80°of shoulder external rotation at 90° of abduction.Results:No signifcant difference in JPS was found between previously injured and noninjured judokas at either joint position.Conclusion:Despite evidence that JPS acuity decreases following shoulder injury, this study did not demonstrate a difference in average error between previously injured and noninjured judokas. Uncontrolled confounding factors, such as age and time since injury, may have affected the results. Sport-specifc shoulder joint loading patterns may also be an important factor that affects JPS.

Effect of Closed Kinetic Chain Training on Neuromuscular Control in the Upper Extremity

1999 ◽  
Vol 8 (3) ◽  
pp. 184-194 ◽  
Author(s):  
Mary E. Ubinger ◽  
William E. Prentice ◽  
Kevin M. Guskiewicz
Keyword(s):  
Upper Extremity ◽  
Neuromuscular Control ◽  
Position Sense ◽  
Joint Position Sense ◽  
Kinetic Chain ◽  
Physically Active ◽  
Significant Difference ◽  
Open Kinetic Chain ◽  
Closed Kinetic Chain ◽  
Stimulation Of

When the upper extremity is injured, open kinetic chain (OKC) exercises are primarily used to increase strength and restore functional ability—the goals of rehabilitation. It is also imperative, however, that the receptors responsible for static and dynamic stabilization of the joint be trained. This can be done with closed kinetic chain (CKC) exercises. The purposes of this study were to investigate the effect of a 4-week CKC training program on the neuromuscular control of the upper extremity and to determine whether there was a significant difference between skill-dominant limb and nondominant limb stability indices. Thirty-two physically active participants (14 men, 18 women) were tested on the FASTEX 4 weeks apart. The training group's scores significantly improved, whereas the control group's scores remained the same. It was concluded that the CKC training significantly improved the training group's ability to remain stable. The results suggest that CKC training can increase the accuracy of joint position sense because of increased stimulation of the mechanoreceptors.

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