scholarly journals Quantitative assessments of elbow flexor muscle performance using twitch interpolation in post-polio patients: no evidence for deterioration

Brain ◽  
1997 ◽  
Vol 120 (4) ◽  
pp. 663-672 ◽  
Author(s):  
G. Allen
Keyword(s):  
Elbow Flexor ◽  
Muscle Performance ◽  
Flexor Muscle ◽  
Twitch Interpolation ◽  
Quantitative Assessments

Specificity in Retraining Craniocervical Flexor Muscle Performance

2007 ◽  
Vol 37 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Shaun O'Leary ◽  
Gwendolen Jull ◽  
Mehwa Kim ◽  
Bill Vicenzino
Keyword(s):  
Muscle Performance ◽  
Flexor Muscle

EFFICACY OF PRESSURE-BIOFEEDBACK GUIDED DEEP CERVICAL FLEXOR TRAINING ON NECK PAIN AND MUSCLE PERFORMANCE IN VISUAL DISPLAY TERMINAL OPERATORS

2013 ◽  
Vol 16 (03) ◽  
pp. 1350011 ◽  
Author(s):  
Md. Nezamuddin ◽  
Shahnawaz Anwer ◽  
Sohrab Ahmad Khan ◽  
Ameed Equebal
Keyword(s):  
Neck Pain ◽  
Pain Intensity ◽  
Exercise Program ◽  
Visual Display ◽  
Muscle Performance ◽  
Control Group ◽  
Women Patients ◽  
Flexor Muscle ◽  
Visual Display Terminal ◽  
Pressure Biofeedback

Purpose: This randomized trial study compared the efficacy of pressure-biofeedback guided deep cervical flexor training as an adjunct with conventional exercise on pain and muscle performance in visually displayed terminal operators. Methods: A total of 50 (22 men and 28 women) patients with neck pain participated in the study. Patients were randomly placed into two groups: a biofeedback group (n = 25) and a control group (n = 25). The biofeedback group received pressure-biofeedback guided deep cervical flexor training program for 5 days a week for 6 weeks, whereas the control group received an exercise program only. Results: On intergroup comparisons, the deep cervical flexor performance in biofeedback group, at the end of 6th week was significantly higher than those of control group (p < 0.01). Pain intensity was also significantly reduced in biofeedback group when compared to control group at the end of trial (p < 0.004). Conclusion: The addition of pressure-biofeedback to a 6-week conventional program appeared to increase deep cervical flexor muscle performance, compared to the exercise program alone for people with reduced muscle performance.

Effects of Inactivation of the Anterior Interpositus Nucleus on the Kinematic and Dynamic Control of Multijoint Movement

2000 ◽  
Vol 84 (4) ◽  
pp. 1988-2000 ◽  
Author(s):  
Scott E. Cooper ◽  
John H. Martin ◽  
Claude Ghez
Keyword(s):  
Angular Displacement ◽  
Elbow Flexion ◽  
Elbow Flexor ◽  
Target Height ◽  
Flexor Muscle ◽  
Interpositus Nucleus ◽  
Interaction Torque ◽  
Muscle Torque ◽  
Phase Lead ◽  
Muscle Torques

We previously showed that inactivating the anterior interpositus nucleus in cats disrupts prehension; paw paths, normally straight and accurate, become curved, hypometric, and more variable. In the present study, we determined the joint kinematic and dynamic origins of this impairment. Animals were restrained in a hammock and trained to reach and grasp a cube of meat from a narrow food well at varied heights; movements were monitored using the MacReflex analysis system. The anterior interpositus nucleus was inactivated by microinjection of the GABA agonist muscimol (0.25–0.5 μg in 0.5 μL saline). For each joint, we computed the torque due to gravity, inertial resistance (termed self torque), interjoint interactions (termed interaction torque), and the combined effects of active muscle contraction and passive soft tissue stretch (termed generalized muscle torque). Inactivation produced significant reductions in the amplitude, velocity, and acceleration of elbow flexion. However, these movements continued to scale normally with target height. Shoulder extension was reduced by inactivation but wrist angular displacement and velocity were not. Inactivation also produced changes in the temporal coordination between elbow, shoulder, and wrist kinematics. Dynamic analysis showed that elbow flexion both before and during inactivation was produced by the combined action of muscle and interaction torque, but that the timing depended on muscle torque. Elbow interaction and muscle torques were scaled to target height both before and during inactivation. Inactivation produced significant reductions in elbow flexor interaction and muscle torques. The duration of elbow flexor muscle torque was prolonged to compensate for the reduction in flexor interaction torque. Shoulder extension was produced by extensor interaction and muscle torques both before and during inactivation. Inactivation produced a reduction in shoulder extension, primarily by reduced interaction torque, but without compensation. Wrist plantarflexion, which occurred during elbow flexion, was driven by plantarflexor interaction and gravitational torques both before and during inactivation. Muscle torque acted in the opposite direction with a phase lead to restrain the plantarflexor interaction torque. During inactivation, there was a reduction in plantarflexor interaction torque and a loss of the phase lead of the muscle torque. Our findings implicate the C1/C3 anterior interpositus zone of the cerebellum in the anticipatory control of intersegmental dynamics during reaching, which zone is required for coordinating the motions of the shoulder and wrist with those of the elbow. In contrast, this cerebellar zone does not play a role in scaling the movement to match a target.

A Study of Intrinsic Factors in Patients with Stress Fractures of the Tibia

1996 ◽  
Vol 17 (8) ◽  
pp. 477-482 ◽  
Author(s):  
Ingrid Ekenman ◽  
Li Tsai-Felländer ◽  
Pär Westblad ◽  
Ibrahim Turan ◽  
Christer Rolf
Keyword(s):  
Range Of Motion ◽  
Stress Fracture ◽  
Reference Group ◽  
Intrinsic Factor ◽  
Gait Pattern ◽  
Stress Fractures ◽  
Muscle Performance ◽  
Plantar Flexor ◽  
Flexor Muscle ◽  
Intrinsic Factors

We aimed to study intrinsic factors in 29 consecutive patients with well-documented unilateral stress fractures of the tibia. Anthropometry, range of motion, isokinetic plantar flexor muscle performance, and gait pattern were analyzed. The uninjured leg served as the control. A reference group of 30 uninjured subjects was compared regarding gait pattern. Anterior stress fractures of the tibia (N = 10) were localized in the push-off/ landing leg in 9/10 athletes, but were similarly distributed between legs in posteromedial injuries (N = 19). Ten (30%) of the stress fracture subjects had bilateral high foot arches, similar to those found in the reference group. There were no other systematic differences in anthropometry, range of motion, gait pattern, or isokinetic plantar flexor muscle peak torque and endurance between injured and uninjured legs. No other differences were found between anterior and posteromedial stress fractures. We conclude that anterior stress fractures of the tibia occur mainly in the push-off/landing leg in athletes. Within the limitations of our protocol, no registered intrinsic factor was found to be directly associated with the occurrence of a stress fracture of the tibia.

Make Tests and Break Tests of Elbow Flexor Muscle Strength

1988 ◽  
Vol 68 (2) ◽  
pp. 193-194 ◽  
Author(s):  
Richard W. Bohannon
Keyword(s):  
Muscle Strength ◽  
Elbow Flexor ◽  
Flexor Muscle

scholarly journals The Effects of Elbow Joint Angle Change on the Elbow Flexor Muscle Activation in Pulley with Weight Exercise

2013 ◽  
Vol 25 (9) ◽  
pp. 1133-1136 ◽  
Author(s):  
Taewook Kang ◽  
Youngjoon Seo ◽  
Jaehoon Park ◽  
Eunseok Dong ◽  
Byungdo Seo ◽  
...  
Keyword(s):  
Elbow Joint ◽  
Muscle Activation ◽  
Joint Angle ◽  
Elbow Flexor ◽  
Flexor Muscle ◽  
Angle Change

scholarly journals A New Method of Isometric Dynamometry for the Craniocervical Flexor Muscles

2005 ◽  
Vol 85 (6) ◽  
pp. 556-564 ◽  
Author(s):  
Shaun P O'Leary ◽  
Bill T Vicenzino ◽  
Gwendolen A Jull
Keyword(s):  
Neck Pain ◽  
Intraclass Correlation ◽  
New Method ◽  
Muscle Performance ◽  
Neutral Position ◽  
Flexor Muscle ◽  
Maximal Voluntary Isometric Contraction ◽  
Good Reliability ◽  
Flexor Muscles ◽  
History Of

Abstract Background and Purpose. A new method of dynamometry has been developed to measure the performance of the craniocervical (CC) flexor muscles by recording the torque that these muscles exert on the cranium around the CC junction. This report describes the method, the specifications of the instrument, and the preliminary reliability data. Subjects and Methods. For the reliability study, 20 subjects (12 subjects with a history of neck pain, 8 subjects without a history of neck pain) performed, on 2 occasions, maximal voluntary isometric contraction (MVIC) tests of CC flexion in 3 positions within the range of CC flexion and submaximal sustained tests (20% and 50% of MVIC) in the middle range of CC flexion (craniocervical neutral position). Reliability coefficients were calculated to establish the test-retest reliability of the measurements. Results. The method demonstrated good reliability over 2 sessions in the measurement of MVIC (intraclass correlation coefficient [ICC]=.79–.93, SEM=0.6–1.4 N·m) and in the measurement of steadiness (standard deviation of torque amplitude) of a sustained contraction at 20% of MVIC (ICC=.74–.80, SEM=0.01 N·m), but not at 50% of MVIC (ICC=.07–.76, SEM=0.04–0.13 N·m). Discussion and Conclusion. The new dynamometry method appears to have potential clinical application in the measurement of craniocervical flexor muscle performance.

Muscle specificity in tests of cervical flexor muscle performance

2007 ◽  
Vol 17 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Shaun O’Leary ◽  
Deborah Falla ◽  
Gwendolen Jull ◽  
Bill Vicenzino
Keyword(s):  
Muscle Performance ◽  
Flexor Muscle ◽  
Muscle Specificity
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