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Dynamic Neuromuscular Stabilization

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https://www.readbyqxmd.com/read/28991043/kinetic-compensations-due-to-chronic-ankle-instability-during-landing-and-jumping
#1
Hyunsoo Kim, S Jun Son, Matthew K Seeley, J Ty Hopkins
INTRODUCTION: Skeletal muscles absorb and transfer kinetic energy during landing and jumping, which are common requirements of various forms of physical activity. Chronic ankle instability (CAI) is associated with impaired neuromuscular control and dynamic stability of the lower extremity. Little is known regarding an intra-limb, lower-extremity joint coordination of kinetics during landing and jumping for CAI patients. We investigated the effect of CAI on lower-extremity joint stiffness, and kinetic and energetic patterns across the ground contact phase of landing and jumping...
October 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28969821/editorial-commentary-increased-risk-of-second-ruptures-and-poorer-outcomes-after-anterior-cruciate-ligament-injury-and-reconstruction-in-hypermobile-athletes-a-potential-synergism-of-passive-ligamentous-and-active-muscular-control-of-dynamic-knee-stability
#2
EDITORIAL
Timothy E Hewett
Graft failure rates were higher and inferior subjective outcomes were observed after anterior cruciate ligament reconstruction in patients with generalized hypermobility. This is a clear and corroborative finding that is highly consilient with other reports of similar studies from the published literature. However, controversy remains regarding other potentially predictive and confounding variables. For example, age, activity level, sex, and dynamic neuromuscular control were not considered in this interesting, important, and potentially impactful study...
October 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/28944715/balance-training-enhances-motor-coordination-during-a-perturbed-side-step-cutting-task
#3
Anderson Souza Oliveira, Priscila de Brito Silva, Morten Enemark Lund, Dario Farina, Uwe Gustav Kersting
Study Design Controlled laboratory study. Background Balance training (BTR) may improve motor coordination, however little is known about the changes in motor coordination during unexpected perturbations to postural control following BTR. Objectives To study the effects of BTR on motor coordination and knee mechanics during perturbed side-step cutting maneuvers in healthy adults. Methods Twenty-six healthy men were randomly assigned to a training group (TG) or control (CG). Before BTR, subjects performed unperturbed, 90° side-step cutting maneuvers and one unexpected perturbed cut (10-cm translation of a moveable platform)...
September 23, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28759982/the-validity-and-reliability-of-a-dynamic-neuromuscular-stabilization-heel-sliding-test-for-core-stability
#4
Young Joo Cha, Jae Jin Lee, Do Hyun Kim, Joshua Sung H You
BACKGROUND: Core stabilization plays an important role in the regulation of postural stability. To overcome shortcomings associated with pain and severe core instability during conventional core stabilization tests, we recently developed the dynamic neuromuscular stabilization-based heel sliding (DNS-HS) test. OBJECTIVE: The purpose of this study was to establish the criterion validity and test-retest reliability of the novel DNS-HS test. METHOD: Twenty young adults with core instability completed both the bilateral straight leg lowering test (BSLLT) and DNS-HS test for the criterion validity study and repeated the DNS-HS test for the test-retest reliability study...
July 21, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28714764/abdominal-hollowing-reduces-lateral-trunk-displacement-during-single-leg-squats-in-healthy-females-but-does-not-affect-peak-hip-abduction-angle-or-knee-abductio-angle-moment
#5
Lukas D Linde, Jessica Archibald, Eve C Lampert, John Z Srbely
CONTEXT: Females suffer 4-6 times more non-contact anterior cruciate ligament (ACL) injuries than males due to neuromuscular control deficits of the hip musculature leading to increases in hip adduction angle, knee abduction angle, and knee abduction moment during dynamic tasks such as single-leg squats. Lateral trunk displacement has been further related to ACL injury risk in females, leading to the incorporation of core strength/stability exercises in ACL preventative training programs...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28704312/trunk-muscle-activation-in-the-back-and-hack-squat-at-the-same-relative-loads
#6
David R Clark, Michael I Lambert, Angus M Hunter
The hack squat (HS) is likely to produce a greater 1 repetition maximum (1RM) compared to the back squat (BS). This can be attributed to the support of the trunk during the HS compared to no support during BS. This support however, may compromise trunk muscle activation (TMA), therefore producing different training adaptations. Accordingly, the purpose of this study was to compare 1RM in BS and HS and TMA at 4 relative loads, 65, 75, 85 and 95% of maximal system mass. Ten males completed 3 test sessions:1) BS and HS 1RM, 2) HS & BS neuromuscular test familiarization, and, 3) Neuromuscular test for 3 reps at 4 loads for BS and HS...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28682215/could-slackline-training-complement-the-fifa-11-programme-regarding-training-of-neuromuscular-control
#7
Tobias Jäger, Julian Kiefer, Inge Werner, Peter A Federolf
The current study compared changes in neuromuscular control between slackline training and the stabilization training elements of the FIFA 11+ programme. Twenty-five students in 2 groups performed a 12-unit training programme. The slackline training group (n = 13) exclusively trained with a slackline. The stabilization training group (n = 12) practised exercises as described in the second part of the FIFA 11+ programme. Improvements in balance were assessed using three tests for dynamic, quasi-static, and perturbed postural control: the star excursion balance test (SEBT), the closed-eye single-leg stance, and the MFT S3-Check...
September 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28658071/a-review-of-field-based-assessments-of-neuromuscular-control-and-their-utility-in-male-youth-soccer-players
#8
Paul J Read, Jon L Oliver, Mark B A De Ste Croix, Gregory D Myer, Rhodri S Lloyd
Lower extremity injuries in male youth soccer are common and equate to a substantial time-loss from training and competitions during the course of a season. Extended periods of absence will impact player involvement in skill and physical development activities, as well as participation in competitive match play. Neuromuscular risk factors for lower extremity injury in male youth soccer players can be categorized into quadriceps dominance; leg dominance; ligament dominance; trunk dominance and reduced dynamic stability...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28626327/the-effects-of-dynamic-exercise-using-the-proprioceptive-neuromuscular-facilitation-pattern-on-posture-in-healthy-adults
#9
Misuk Cho, Wontae Gong
[Purpose] The purpose of this study is to examine the effects of dynamic exercise utilizing the proprioceptor neuromuscular facilitation pattern accompanied by abdominal drawing-in exercises on posture in healthy adults. [Subjects and Methods] The total number of subjects were 32; 16 were randomly placed in the training group, and the remaining 16 made up the control group. The subjects in the training group conducted 5 sets of dynamic exercises utilizing the proprioceptor neuromuscular facilitation patterns each day, 3 times a week for 6 weeks...
June 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28605232/sensorimotor-control-of-the-shoulder-in-professional-volleyball-players-with-isolated-infraspinatus-muscle-atrophy
#10
Samuele Contemori, Andrea Biscarini, Fabio Massimo Botti, Daniele Busti, Roberto Panichi, Vito Enrico Pettorossi
CONTEXT: Isolated infraspinatus muscle atrophy (IIMA) only affects the hitting shoulder of overhead-activity athletes, and is caused by suprascapular nerve neuropathy. No study has assessed the static and dynamic stability of the shoulder in overhead professional athletes with IIMA to reveal possible shoulder sensorimotor alterations. OBJECTIVE: To assess the shoulder static stability, dynamic stability, and strength in professional volleyball players with IIMA and in healthy control players...
June 12, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28603786/how-anterior-cruciate-ligament-injury-was-averted-during-knee-collapse-in-a-nba-point-guard
#11
Nathan D Schilaty, Nathaniel A Bates, Aaron J Krych, Timothy E Hewett
Non-contact anterior cruciate ligament (ACL) injuries occur with rapid decelerations and pivoting. A recent injury to a high-level National Basketball Association (NBA) player demonstrated neuromuscular control and injury-sparing mechanisms that resulted in only minor ligament injury to the medial collateral ligament. We analyzed biomechanical mechanisms via publically available orthogonal 2-D video to demonstrate how this potential ACL injury was averted. Analysis of the knee injury mechanism demonstrated that the NBA player experienced low ground reaction force, high sagittal plane flexion, and maintenance of frontal plane stability with neuromuscular control...
2017: Ann Musculoskelet Med
https://www.readbyqxmd.com/read/28601095/reactive-stepping-with-functional-neuromuscular-stimulation-in-response-to-forward-directed-perturbations
#12
Alexander J Hunt, Brooke M Odle, Lisa M Lombardo, Musa L Audu, Ronald J Triolo
BACKGROUND: Implanted motor system neuroprostheses can be effective at increasing personal mobility of persons paralyzed by spinal cord injuries. However, currently available neural stimulation systems for standing employ patterns of constant activation and are unreactive to changing postural demands. METHODS: In this work, we developed a closed-loop controller for detecting forward-directed body disturbances and initiating a stabilizing step in a person with spinal cord injury...
June 10, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28582897/reflex-mediated-dynamic-neuromuscular-stabilization-in-stroke-patients-emg-processing-and-ultrasound-imaging
#13
Hyun S Yoon, Joshua Sung H You
BACKGROUND: Postural core instability is associated with poor dynamic balance and a high risk of serious falls. Both neurodevelopmental treatment (NDT) and dynamic neuromuscular stabilization (DNS) core stabilization exercises have been used to improve core stability, but the outcomes of these treatments remain unclear. OBJECTIVE: This study was undertaken to examine the therapeutic effects of NDT and DNS core stabilization exercises on muscular activity, core stability, and core muscle thickness...
July 20, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/28577906/dynamic-head-neck-stabilization-and-modulation-with-perturbation-bandwidth-investigated-using-a-multisegment-neuromuscular-model
#14
Riender Happee, Edo de Bruijn, Patrick A Forbes, Frans C T van der Helm
The human head-neck system requires continuous stabilization in the presence of gravity and trunk motion. We investigated contributions of the vestibulocollic reflex (VCR), the cervicocollic reflex (CCR), and neck muscle co-contraction to head-in-space and head-on-trunk stabilization, and investigated modulation of the stabilization strategy with the frequency content of trunk perturbations and the presence of visual feedback. We developed a multisegment cervical spine model where reflex gains (VCR and CCR) and neck muscle co-contraction were estimated by fitting the model to the response of young healthy subjects, seated and exposed to anterior-posterior trunk motion, with frequency content from 0...
May 17, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28575753/foot-muscle-morphology-is-related-to-center-of-pressure-sway-and-control-mechanisms-during-single-leg-standing
#15
Xianyi Zhang, Kurt Heinrich Schütte, Benedicte Vanwanseele
Maintaining balance is vitally important in everyday life. Investigating the effects of individual foot muscle morphology on balance may provide insights into neuromuscular balance control mechanisms. This study aimed to examine the correlation between the morphology of foot muscles and balance performance during single-leg standing. Twenty-eight recreational runners were recruited in this study. An ultrasound device was used to measure the thickness and cross-sectional area of three intrinsic foot muscles (abductor hallucis, flexor digitorum brevis and quadratus plantae) and peroneus muscles...
May 25, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28538303/examining-fundamental-movement-competency-and-closed-chain-upper-extremity-dynamic-balance-in-swimmers
#16
Garrett S Bullock, Nate Brookreson, Amy M Knab, Robert J Butler
Abnormal fundamental movement patterns and upper-quarter dynamic balance are proposed mechanisms affecting athletic performance and injury risk. There are few studies investigating functional movement and closed-chain upper-extremity dynamic stability in swimmers. The purpose of this study was to determine differences in fundamental movement competency and closed-chain upper-extremity dynamic balance, using the Functional Movement Screen (FMS) and Upper-Quarter Y Balance Test (YBT-UQ), of high school (HS; n = 70) and collegiate (COL; n = 70) swimmers...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28528447/a-single-bout-of-endurance-exercise-modulates-eeg-microstates-temporal-features
#17
Jérôme N Spring, Miralena I Tomescu, Jérôme Barral
Electrical neuroimaging is a promising method to explore the spontaneous brain function after physical exercise. The present study aims to investigate the effect of acute physical exercise on the temporal dynamic of the resting brain activity captured by the four conventional map topographies (microstates) described in the literature, and to associate these brain changes with the post-exercise neuromuscular function. Twenty endurance-trained subjects performed a 30-min biking task at 60% of their maximal aerobic power followed by a 10 km all-out time trial...
May 20, 2017: Brain Topography
https://www.readbyqxmd.com/read/28500909/development-and-testing-of-a-moment-based-coactivation-index-to-assess-complex-dynamic-tasks-for-the-lumbar-spine
#18
Peter Le, Alexander Aurand, Jonathan S Dufour, Gregory G Knapik, Thomas M Best, Safdar N Khan, Ehud Mendel, William S Marras
BACKGROUND: Many methods exist to describe coactivation between muscles. However, most methods have limited capability in the assessment of coactivation during complex dynamic tasks for multi-muscle systems such as the lumbar spine. The ability to assess coactivation is important for the understanding of neuromuscular inefficiency. In the context of this manuscript, inefficiency is defined as the effort or level of coactivation beyond what may be necessary to accomplish a task (e.g., muscle guarding during postural stabilization)...
July 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28482203/transition-from-shod-to-barefoot-alters-dynamic-stability-during-running
#19
Antonis Ekizos, Alessandro Santuz, Adamantios Arampatzis
INTRODUCTION: Barefoot running recently received increased attention, with controversial results regarding its effects on injury risk and performance. Numerous studies examined the kinetic and kinematic changes between the shod and the barefoot condition. Intrinsic parameters such as the local dynamic stability could provide new insight regarding neuromuscular control when immediately transitioning from one running condition to the other. We investigated the local dynamic stability during the change from shod to barefoot running...
July 2017: Gait & Posture
https://www.readbyqxmd.com/read/28370538/shoulder-position-sense-in-volleyball-players-with-infraspinatus-atrophy-secondary-to-suprascapular-nerve-neuropathy
#20
S Contemori, A Biscarini
Isolated infraspinatus atrophy (IIA) is a common condition among overhead-activity athletes, which affects the hitting shoulder and is caused by suprascapular nerve injury. As the suprascapular nerve is a mixed nerve, such damage could lead to reduced afferent proprioceptive information and impaired shoulder sensorimotor control. This study aimed to evaluate the proprioception of the shoulder with IIA, through the assessment of shoulder position sense. The shoulder position sense was assessed in 24 professional volleyball players (12 players with IIA and 12 healthy players) with a blind dynamic shoulder repositioning test (all participants were blindfolded during the test)...
March 29, 2017: Scandinavian Journal of Medicine & Science in Sports
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