Elongation Behavior of Calcaneofibular and Cervical Ligaments during Inversion Loads Applied in an Open Kinetic Chain

1998 ◽  
Vol 19 (4) ◽  
pp. 232-239 ◽  
Author(s):  
Lewis P. Martin ◽  
Jennifer S. Wayne ◽  
Timothy J. Monahan ◽  
Robert S. Adelaar
Keyword(s):  
Range Of Motion ◽  
Subtalar Joint ◽  
Average Increase ◽  
Kinetic Chain ◽  
Calcaneofibular Ligament ◽  
Mechanical Methods ◽  
Different Types ◽  
Open Kinetic Chain ◽  
The Mean ◽  
The Difference

The cervical ligament plays a significant role in lateral stability of the subtalar joint but has received little attention compared with other ankle and subtalar joint ligaments. The purpose of this research was twofold. First, the elongation behavior of the cervical ligament was assessed with the calcaneofibular ligament intact and cut during two different types of inversion loads (manual and mechanical). Second, inversion range of motion was determined concomitantly with inversion loading and the difference in inversion range of motion between the calcaneofibular ligament intact to cut state was compared. The mean elongation of the cervical ligament with the calcaneofibular intact was 0.58 mm (± 0.33 mm) and 0.46 mm (± 0.23 mm) for manual and mechanical methods, respectively, and 0.88 mm (± 0.37 mm) and 0.78 mm (± 0.37 mm), respectively, for the same methods in the absence of the calcaneofibular ligament. This difference was statistically significant ( P < 0.05 manually and P < 0.02 mechanically). An average increase in the inversion range of motion was noted with both methods [7.5° manually (± 2.75°) and 7.7° mechanically (± 2.95°)] after lesioning of the calcaneofibular ligament. This difference was statistically significant ( P < 0.001) for both manual and mechanical range of motion testing. The results of this study indicate that there is a significant increase in elongation of the cervical ligament in the absence of the calcaneofibular ligament during manual and mechanically applied inversion loads in a open kinetic chain. Clinical and theoretical implications of this data are discussed.

scholarly journals Can segmental mobility be increased by cervical arthroplasty?

2017 ◽  
Vol 42 (2) ◽  
pp. E3 ◽  
Author(s):  
Hsuan-Kan Chang ◽  
Chih-Chang Chang ◽  
Tsung-Hsi Tu ◽  
Jau-Ching Wu ◽  
Wen-Cheng Huang ◽  
...  
Keyword(s):  
Cobb Angle ◽  
Range Of Motion ◽  
Clinical Outcomes ◽  
Japanese Orthopaedic Association ◽  
Neck Disability Index ◽  
Cervical Disc ◽  
Segmental Mobility ◽  
Arm Pain ◽  
The Mean ◽  
The Difference

OBJECTIVE Many reports have successfully demonstrated that cervical disc arthroplasty (CDA) can preserve range of motion after 1- or 2-level discectomy. However, few studies have addressed the extent of changes in segmental mobility after CDA or their clinical correlations. METHODS Data from consecutive patients who underwent 1-level CDA were retrospectively reviewed. Indications for surgery were medically intractable degenerative disc disease and spondylosis. Clinical outcomes, including visual analog scale (VAS)–measured neck and arm pain, Neck Disability Index (NDI), and Japanese Orthopaedic Association (JOA) scores, were analyzed. Radiographic outcomes, including C2–7 Cobb angle, the difference between pre- and postoperative C2–7 Cobb angle (ΔC2–7 Cobb angle), sagittal vertical axis (SVA), the difference between pre- and postoperative SVA (ΔSVA), segmental range of motion (ROM), and the difference between pre- and postoperative ROM (ΔROM), were assessed for their association with clinical outcomes. All patients underwent CT scanning, by which the presence and severity of heterotopic ossification (HO) were determined during the follow-up. RESULTS A total of 50 patients (mean age 45.6 ± 9.33 years) underwent a 1-level CDA (Prestige LP disc) and were followed up for a mean duration of 27.7 ± 8.76 months. All clinical outcomes, including VAS, NDI, and JOA scores, improved significantly after surgery. Preoperative and postoperative ROM values were similar (mean 9.5° vs 9.0°, p > 0.05) at each indexed level. The mean changes in segmental mobility (ΔROM) were −0.5° ± 6.13°. Patients with increased segmental mobility after surgery (ΔROM > 0°) had a lower incidence of HO and HO that was less severe (p = 0.048) than those whose ΔROM was < 0°. Segmental mobility (ROM) was significantly lower in patients with higher HO grade (p = 0.012), but it did not affect the clinical outcomes. The preoperative and postoperative C2–7 Cobb angles and SVA remained similar. The postoperative C2–7 Cobb angles, SVA, ΔC2–7 Cobb angles, and ΔSVA were not correlated to clinical outcomes after CDA. CONCLUSIONS Segmental mobility (as reflected by the mean ROM) and overall cervical alignment (i.e., mean SVA and C2–7 Cobb angle) had no significant impact on clinical outcomes after 1-level CDA. Patients with increased segmental mobility (ΔROM > 0°) had significantly less HO and similarly improved clinical outcomes than those with decreased segmental mobility (ΔROM < 0°).

Reliabilty of open kinetic chain subtalar joint measurement

The Foot ◽  
1997 ◽  
Vol 7 (3) ◽  
pp. 128-134 ◽  
Author(s):  
S.Weiner Ogilvie ◽  
G.C. Rendall ◽  
R.J. Abboud
Keyword(s):  
Subtalar Joint ◽  
Kinetic Chain ◽  
Joint Measurement ◽  
Open Kinetic Chain

scholarly journals Femoral stem neck geometry determines hip range of motion shape

2021 ◽  
Vol 10 (12) ◽  
pp. 780-789
Author(s):  
Aidin Eslam Pour ◽  
Jean Yves Lazennec ◽  
Kunj P. Patel ◽  
Manan P. Anjaria ◽  
Paul Edgar Beaulé ◽  
...  
Keyword(s):  
Range Of Motion ◽  
Pelvic Tilt ◽  
External Rotation ◽  
Femoral Stem ◽  
Implant Design ◽  
Secondary Outcome ◽  
Hip Range Of Motion ◽  
The Mean ◽  
The Difference ◽  
Prosthetic Impingement

Aims In computer simulations, the shape of the range of motion (ROM) of a stem with a cylindrical neck design will be a perfect cone. However, many modern stems have rectangular/oval-shaped necks. We hypothesized that the rectangular/oval stem neck will affect the shape of the ROM and the prosthetic impingement. Methods Total hip arthroplasty (THA) motion while standing and sitting was simulated using a MATLAB model (one stem with a cylindrical neck and one stem with a rectangular neck). The primary predictor was the geometry of the neck (cylindrical vs rectangular) and the main outcome was the shape of ROM based on the prosthetic impingement between the neck and the liner. The secondary outcome was the difference in the ROM provided by each neck geometry and the effect of the pelvic tilt on this ROM. Multiple regression was used to analyze the data. Results The stem with a rectangular neck has increased internal and external rotation with a quatrefoil cross-section compared to a cone in a cylindrical neck. Modification of the cup orientation and pelvic tilt affected the direction of projection of the cone or quatrefoil shape. The mean increase in internal rotation with a rectangular neck was 3.4° (0° to 7.9°; p < 0.001); for external rotation, it was 2.8° (0.5° to 7.8°; p < 0.001). Conclusion Our study shows the importance of attention to femoral implant design for the assessment of prosthetic impingement. Any universal mathematical model or computer simulation that ignores each stem’s unique neck geometry will provide inaccurate predictions of prosthetic impingement. Cite this article: Bone Joint Res 2021;10(12):780–789.

scholarly journals PENGUATAN QUADRICEPS MENGGUNAKAN METODE CLOSED KINETIC CHAIN LEBIH MENJAGA SUDUT QUADRICEPS (Q ANGLE) DIBANDING DENGAN OPEN KINETIC CHAIN PADA SUBJEK DENGAN ABNORMAL SUDUT QUADRICEPS

2017 ◽  
Author(s):  
Aditya Johan Romadhon ◽  
I Putu Gede Adiatmika ◽  
Muh. Ali Imron ◽  
Wayan Weta ◽  
I Dewa Ayu Inten Dwi Primayanti ◽  
...  
Keyword(s):  
Training Program ◽  
T Test ◽  
Kinetic Chain ◽  
Leg Extension ◽  
Q Angle ◽  
Open Kinetic Chain ◽  
Closed Kinetic Chain ◽  
The Mean ◽  
Paired T Test ◽  
Group 1

Introduction: Quadriceps strengthening usualy find in fitness center or clinical rehabilitation physiotherapy programs, there are two methods in strengthening quadriceps programs, closed kinetic chain and open kinetic chain methods, several researchers use to used these methods for reducing pain intensity, improve functional ability and reducing quadriceps angle, indeed these methods can be used to prevent patellofemoral pain syndrome risk in asymptomatic person with abnormal q angle. Purpose: Purpose of this study is to study the difference of closed and open kinetic chain to maintain quadriceps angle on subject with abnormal quadriceps angle. Method: This experimental study is to compare closed and open kinetic chain to maintain quadriceps angle in subject with abnormal quadriceps angle, thirty six males samples 15 to 21 years old devided into two Groups, Group 1 applied a treatment with closed kinetic chain methods using barbell squat training and the second group have applied a treatment with open kinetic chain method using leg extension training, quadriceps angle measured before and after treatment to each Group, Result: Both quadriceps strengthening methods, closed and open kinetic chain has same beneficial to maintain quadriceps angle, Group 1 after analyzed by paired t test show the mean right quadriceps angle 13.38 ± 2.93 degree and the mean of left quadriceps angle 12.88 ± 2.44 degree, with significancy value p = 0.001, likewise in Group 2 after analyzed by paired t test show the mean of right quadriceps angle 15.66 ± 2.74 degree and the mean of left quadriceps angle is 15.38 ± 3.22 degree, with significancy value p = 0.001, but closed kinetic chain method is more effective than open kinetic chain in maintaining quadriceps angle with p < 0.05. Conclusion: Therefore this result of study can be reference for reader as an athlete, fitness instructor and physiotherapist in order to get better understanding to choose and create best training program for quadriceps strengthening. Therefore it’s been suggest to someone if they have abnormal quadriceps angle, they must choose the closed kinetic chain exercise as the main program in quadriceps training program

Open Kinetic Chain Exercises in a Restricted Range of Motion After Anterior Cruciate Ligament Reconstruction

2013 ◽  
Vol 41 (4) ◽  
pp. 788-794 ◽  
Author(s):  
Thiago Yukio Fukuda ◽  
Deborah Fingerhut ◽  
Viviane Coimbra Moreira ◽  
Paula Maria Ferreira Camarini ◽  
Nathalia Folco Scodeller ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Anterior Cruciate Ligament Reconstruction ◽  
Range Of Motion ◽  
Ligament Reconstruction ◽  
Cruciate Ligament ◽  
Restricted Range ◽  
Kinetic Chain ◽  
Cruciate Ligament Reconstruction ◽  
Open Kinetic Chain ◽  
Anterior Cruciate

Contracting and Chaining to Improve the Performance of a College Golf Team: Improvement and Deterioration

1994 ◽  
Vol 78 (3_suppl) ◽  
pp. 1099-1105 ◽  
Author(s):  
Thomas C. Simek ◽  
Richard M. O'Brien ◽  
Lesli B. Figlerski
Keyword(s):  
Recent Work ◽  
Average Increase ◽  
The Third ◽  
Tangible Rewards ◽  
The Mean ◽  
The Difference ◽  
Measurement Period

Recent work with operant procedures in sports has shown that feedback, reinforcement, and chaining can be effective techniques in improving performance. In many cases, however, a problem remains in getting the participants to practice the appropriate responses. In the present study, 14 college golfers were put on successive contingency contracts over three weeks to go through the Total Golf chaining-mastery program of Simek and O'Brien. Rewards consisted of activities such as spots on the starting team and the opportunity to play better courses as well as tangible rewards such as new golf balls. After the first two weeks of training, through 19 steps backward from the green, the mean of three posttraining rounds for these 14 golfers was 3.4 strokes lower than the mean of their three rounds at baseline. At this point, the coach did not follow through with the rewards promised in the second contract. Having been placed on extinction, only three of the 14 players followed through on the third contract. In this return to baseline-like condition an average increase of over two strokes for the team as a whole was noted. The number of steps of the chain mastered in practice and the difference between mean scores at baseline and the last measurement period correlated 86, indicating that 74% of the improvement in golf scores was accounted for by performance on the mastery chain.

Groat proportion in oats as measured by different methods: Analysis of oats resistant to dehulling and sources of error in mechanical dehulling

2010 ◽  
Vol 90 (4) ◽  
pp. 391-397 ◽  
Author(s):  
D C Doehlert ◽  
M S McMullen ◽  
N R Riveland
Keyword(s):  
General Population ◽  
Accurate Method ◽  
Compressed Air ◽  
Sources Of Error ◽  
Mechanical Methods ◽  
Hull Structure ◽  
The Mean ◽  
The Difference ◽  
Highly Correlated ◽  
Mean Kernel

Groat proportion is the groat yield from an oat dehulling process. We compared hand, impact and compressed-air dehulling to measure groat proportion, and evaluated sources of error. Hand dehulling was the simplest and most accurate method, because all groats and hulls can be accounted for. Mechanical methods dehulled most, but not all, oat kernels. Failure to account for oats resistant to dehulling in calculations resulted in gross errors. Oats resistant to impact dehulling did not differ in groat proportion from the general population, but differed in many physical properties. Hull structure may account the most for their resistance to dehulling. Mechanically dehulled oats consistently yielded lower groat proportions than those from hand dehulling. Since the difference cannot be attributed to oats resistant to dehulling, groats must be lost during the aspiration process, common to all mechanical methods. Uniform aspiration protocols should provide a uniform error. All groat proportion values obtained here were highly correlated among themselves, except when values were not corrected for oats resistant to dehulling. A theoretical groat proportion calculated from the ratio of the mean groat mass (collected by any means available) and the mean kernel mass yielded a groat proportion value that did not differ significantly from the hand dehulling value.Key words: Oat milling, groat proportion, oat dehulling

The Effect of Vocabulary Intervention on Text Comprehension: Who Benefits?

2019 ◽  
Vol 50 (4) ◽  
pp. 562-578 ◽  
Author(s):  
Dawna Duff
Keyword(s):  
Middle School ◽  
Reading Comprehension ◽  
Text Comprehension ◽  
Classroom Instruction ◽  
Vocabulary Instruction ◽  
Clinical Intervention ◽  
Vocabulary Knowledge ◽  
Vocabulary Intervention ◽  
The Mean ◽  
The Difference

Purpose Vocabulary intervention can improve comprehension of texts containing taught words, but it is unclear if all middle school readers get this benefit. This study tests 2 hypotheses about variables that predict response to vocabulary treatment on text comprehension: gains in vocabulary knowledge due to treatment and pretreatment reading comprehension scores. Method Students in Grade 6 ( N = 23) completed a 5-session intervention based on robust vocabulary instruction (RVI). Knowledge of the semantics of taught words was measured pre- and posttreatment. Participants then read 2 matched texts, 1 containing taught words (treated) and 1 not (untreated). Treated texts and taught word lists were counterbalanced across participants. The difference between text comprehension scores in treated and untreated conditions was taken as a measure of the effect of RVI on text comprehension. Results RVI resulted in significant gains in knowledge of taught words ( d RM = 2.26) and text comprehension ( d RM = 0.31). The extent of gains in vocabulary knowledge after vocabulary treatment did not predict the effect of RVI on comprehension of texts. However, untreated reading comprehension scores moderated the effect of the vocabulary treatment on text comprehension: Lower reading comprehension was associated with greater gains in text comprehension. Readers with comprehension scores below the mean experienced large gains in comprehension, but those with average/above average reading comprehension scores did not. Conclusion Vocabulary instruction had a larger effect on text comprehension for readers in Grade 6 who had lower untreated reading comprehension scores. In contrast, the amount that children learned about taught vocabulary did not predict the effect of vocabulary instruction on text comprehension. This has implications for the identification of 6th-grade students who would benefit from classroom instruction or clinical intervention targeting vocabulary knowledge.

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