The Effect of Target Position on the Accuracy of Cervical-Spine-Rotation Active Joint-Position Sense

2016 ◽  
Vol 25 (1) ◽  
pp. 58-63 ◽  
Author(s):  
Takashi Nagai ◽  
Nicholas C. Clark ◽  
John P. Abt ◽  
Timothy C. Sell ◽  
Nicholas R. Heebner ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Outcome Measures ◽  
Human Performance ◽  
Target Position ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Active Joint ◽  
Cross Sectional ◽  
Cervical Rotation

Context:The cervical spine can be divided into upper and lower units, each making a different contribution to the magnitude of rotation and proprioception. However, few studies have examined the effect of the cervical-rotation positions on proprioception.Objective:To compare cervical-spine rotation active joint-position sense (AJPS) near midrange of motion (mid-ROM; 30°) and near end-ROM (60°).Design:Cross-sectional study.Setting:Human performance research laboratory.Participants:53 military helicopter pilots (age 28.4 ± 6.2 y, height 175.3 ± 9.3 cm, weight 80.1 ± 11.8 kg).Main Outcome Measures:A motion-analysis system was used to record cervical-rotation kinematics. Subjects sat in a chair wearing a headband and blindfold. First, they actively rotated the head right or left to a target position (30°/60°), with real-time verbal cues provided by the tester. Subjects held the target position for 5 s and then returned to the start position. After this, they replicated the target position as closely as possible. Five trials were performed in both directions to both target positions (R30/R60/L30/L60). Order of direction/position was randomized. The difference between target and replicated positions was calculated and defined as absolute error (AE), and the mean of 5 trials was used for analyses. Wilcoxon signed-ranks tests were used to compare AJPS at the different target positions (P < .0125 with Bonferroni adjustments).Results:End-ROM AEs were significantly more accurate than mid-ROM AEs (P = .001).Conclusion:Cervical-spine-rotation AJPS is more accurate near end-ROM than mid-ROM. Both target positions should be used to examine cervical-spine-rotation AJPS of both the upper and lower units.

scholarly journals Dynamic-Position-Sense Impairment’s Independence of Perceived Knee Function in Women With ACL Reconstruction

2012 ◽  
Vol 21 (1) ◽  
pp. 44-53 ◽  
Author(s):  
Andrew E. Littmann ◽  
Masaki Iguchi ◽  
Sangeetha Madhavan ◽  
Jamie L. Kolarik ◽  
Richard K. Shields
Keyword(s):  
Processing Time ◽  
Cruciate Ligament ◽  
Position Sense ◽  
Joint Position Sense ◽  
Knee Function ◽  
Joint Position ◽  
Active Joint ◽  
Cross Sectional ◽  
Outcome Measurements ◽  
Target Angle

Context:There is conflicting evidence in the literature regarding whether women with anterior cruciate ligament reconstruction (ACLR) demonstrate impaired proprioception. This study examined dynamic-position-sense accuracy and central-nervous-system (CNS) processing time between those with and without long-term ACLR.Objective:To compare proprioception of knee movement in women with ACLR and healthy controls.Design:Cross-sectional.Setting:Human neuromuscular performance laboratory.Participants:11 women (age 22.64 ± 2.4 y) with ACLR (1.6–5.8 y postsurgery) and 20 women without (age 24.05 ± 1.4 y).Interventions:The authors evaluated subjects using 3 methods to assess position sense. During knee flexion at pseudorandomly selected speeds (40°, 60°, 80°, 90°, and 100°/s), subjects indicated with their index finger when their knee reached a predetermined target angle (50°). Accuracy was calculated as an error score. CNS processing time was computed using the time to detect movement and the minimum time of angle indication. Passive and active joint-position sense were also determined at a slow velocity (3°/s) from various knee-joint starting angles.Main Outcome Measurements:Absolute and constant error of target angle, indication accuracy, CNS processing time, and perceived function.Results:Both subject groups showed similar levels of error during dynamic-position-sense testing, despite continued differences in perceived knee function. Estimated CNS processing time was 260 ms for both groups. Joint-position sense during slow active or passive movement did not differ between cohorts.Conclusions:Control and ACLR subjects demonstrated similar dynamic, passive, and active joint-position-sense error and CNS processing speed even though ACLR subjects reported greater impairment of function. The impairment of proprioception is independent of post-ACLR perception of function.

scholarly journals Immediate Effects of Kinesiology Taping of Quadriceps on Motor Performance after Muscle Fatigued Induction

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Ick Keun Ahn ◽  
You Lim Kim ◽  
Young-Hyeon Bae ◽  
Suk Min Lee
Keyword(s):  
Motor Performance ◽  
Muscle Power ◽  
Peak Torque ◽  
Position Sense ◽  
Joint Position Sense ◽  
Static Balance ◽  
Joint Position ◽  
Active Joint ◽  
Balance Test ◽  
Cross Sectional

Objectives. The purpose of this cross-sectional single-blind study was to investigate the immediate effects of Kinesiology taping of quadriceps on motor performance after muscle fatigued induction.Design. Randomized controlled cross-sectional design.Subjects. Forty-five subjects participated in this study. Participants were divided into three groups: Kinesiology taping group, placebo taping group, and nontaping group.Methods. Subjects performed short-term exercise for muscle fatigued induction, followed by the application of each intervention. Peak torque test, one-leg single hop test, active joint position sense test, and one-leg static balance test were carried out before and after the intervention.Results. Peak torque and single-leg hopping distance were significantly increased when Kinesiology taping was applied (p<0.05). But there were no significant effects on active joint position sense and single-leg static balance.Conclusions. We proved that Kinesiology taping is effective in restoring muscle power reduced after muscle fatigued induction. Therefore, we suggest that Kinesiology taping is beneficial for fatigued muscles.

Shoulder Joint Position Sense Can Be Reduced by Sensory Reference Frame Transformations

2021 ◽  
pp. 003151252199304
Author(s):  
David Phillips ◽  
Albena Zahariev ◽  
Andrew Karduna
Keyword(s):  
Reference Frame ◽  
Constant Error ◽  
Sensory Information ◽  
Target Position ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Multiple Sources ◽  
Directional Bias

Joint position sense (JPS) is commonly evaluated using an angle replication protocol with vision occluded. However, multiple sources of sensory information are integrated when moving limbs accurately, not just proprioception. The purpose of this study was to examine different availability of vision during an active JPS protocol at the shoulder. Specifically, the effects of four conditions of vision availability were examined for three target shoulder elevation angles (50°, 70° & 90°): vision occluded continuously (P-P); vision available continuously (VP-VP); vision occluded only during target memorization (P-VP); and vision occluded only during target position replication (VP-P). There were 18 participants ( M age = 21, SD = 1 years). We used separate repeated ANOVAs to examine the effect of condition and target angle on participants’ absolute error (AE, a measure of accuracy) and constant error (CE, a measure of directional bias). We found a significant main effect for condition and angle for both dependent variables ( p < 0.01), and follow-up analysis indicated that participants were most accurate in the VP-VP condition and least accurate in the P-VP condition. Further follow-up analysis showed that accuracy improved with higher target elevation angles, consistent with previous research findings. Constant error results were similar, as there was a prominent tendency to overshoot the target. Unsurprisingly, participants performed best at the angle replication protocol with their eyes open. However, while accuracy was reduced when vision was occluded during target memorization, it was restored during target replication. This finding may have indicated an accuracy cost due to introduced noise when transforming sensory information from a proprioceptive reference frame into a visual reference frame.

Differences in Joint-Position Sense and Vibratory Threshold in Runners With and Without a History of Overuse Injury

2015 ◽  
Vol 24 (1) ◽  
pp. 6-12 ◽  
Author(s):  
Tiffany Switlick ◽  
Thomas W. Kernozek ◽  
Stacey Meardon
Keyword(s):  
Postural Control ◽  
Outcome Measures ◽  
Overuse Injury ◽  
Position Sense ◽  
Joint Position Sense ◽  
Sensory Threshold ◽  
Sensorimotor Function ◽  
Joint Position ◽  
Ankle Eversion ◽  
History Of

Context:A relationship between altered postural control and injury has been reported in sports. Sensorimotor function serves a fundamental role in postural control and is not often studied in runners. Persons who sustain running injury may have altered sensorimotor function contributing to risk of injury or reinjury.Objectives:To determine if differences in knee and ankle proprioception or plantar sensation exist between injured and noninjured runners.Design:Retrospective case-control study.Setting:University campus.Participants:Twenty runners with a history of lower-extremity overuse injury and 20 noninjured runners were examined. Injured runners were subcategorized into 2 groups based on site of injury: foot/ankle and knee/hip.Main Outcome Measures:Active absolute joint-repositioning error of the ankle at 20° inversion and 10° eversion and the knee at 15° and 40° flexion was assessed using an isokinetic dynamometer. Vibratory threshold at the calcaneus, arch, and great toe was determined for each subject using a handheld electric sensory threshold instrument.Results:Runners in the injured-foot/ankle group had increased absolute error during ankle-eversion repositioning (6.55° ± 3.58°) compared with those in the noninjured (4.04° ± 1.78°, P = .01) and the hip/knee (3.63° ± 2.2°, P = .01) groups. Runners in the injured group, as a whole, had greater sensitivity in the arch of the plantar surface (2.94 ± 0.52 V) than noninjured runners (2.38 ± 0.53 V, P = .02).Conclusions:Differences in ankle-eversion proprioception between runners with a history of ankle and foot injuries and noninjured runners were observed. Runners with a history of injury also displayed an increased vibratory threshold in the arch region compared with noninjured runners. Poor ankle-joint-position sense and increased plantar sensitivity suggest altered sensorimotor function after injury. These factors may influence underlying postural control and contribute to altered loading responses commonly observed in injured runners.

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.

scholarly journals Effects of Tai Chi versus Proprioception Exercise Program on Neuromuscular Function of the Ankle in Elderly People: A Randomized Controlled Trial

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Jing Liu ◽  
Xue-Qiang Wang ◽  
Jie-Jiao Zheng ◽  
Yu-Jian Pan ◽  
Ying-Hui Hua ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Elderly People ◽  
Outcome Measures ◽  
Tai Chi ◽  
Exercise Program ◽  
Neuromuscular Function ◽  
Position Sense ◽  
Joint Position Sense ◽  
Elderly Subjects ◽  
Joint Position

Background. Tai Chi is a traditional Chinese medicine exercise used for improving neuromuscular function. This study aimed to investigate the effects of Tai Chi versus proprioception exercise program on neuromuscular function of the ankle in elderly people.Methods. Sixty elderly subjects were randomly allocated into three groups of 20 subjects per group. For 16 consecutive weeks, subjects participated in Tai Chi, proprioception exercise, or no structured exercise. Primary outcome measures included joint position sense and muscle strength of ankle. Subjects completed a satisfaction questionnaire upon study completion in Tai Chi and proprioception groups.Results. (1) Both Tai Chi group and proprioception exercise group were significantly better than control group in joint position sense of ankle, and there were no significant differences in joint position sense of ankle between TC group and PE group. (2) There were no significant differences in muscle strength of ankle among groups. (3) Subjects expressed more satisfaction with Tai Chi than with proprioception exercise program.Conclusions. None of the outcome measures on neuromuscular function at the ankle showed significant change posttraining in the two structured exercise groups. However, the subjects expressed more interest in and satisfaction with Tai Chi than proprioception exercise.

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.

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