Effect Of Limb Position Research Articles

The Effect of Contralateral Limb Position on Joint Kinetics During Unilateral Squatting Exercises

The Effect of Contralateral Limb Position on Joint Kinetics During Unilateral Squatting Exercises

The Effect of Contralateral Limb Position on Joint Kinetics During Unilateral Squatting Exercises

The Effect of Contralateral Limb Position on Joint Kinetics During Unilateral Squatting Exercises

Boundary conditions at the tendon-bone interface.

The reconstruction of a tendon-bone interface, as in rotator-cuff repairs, remains a challenging surgical problem. There is however, little data to show what effect joint position or repair loading under physiological conditions have on the repaired tendon-bone interface. A change in the amount of contact area or load at the tendon-bone interface may influence healing. In this study we investigated the effect of limb position and boundary conditions on the tendon-bone interface in an in vitro rabbit tendon-bone repair model using both unlinked and linked suture repairs.

Saccades to somatosensory targets. I. behavioral characteristics.

1. We compared the properties of saccades to somatosensory and visual targets. This comparison provides insight into the translation of sensory signals coding target location in different sensory coordinate frameworks into motor commands of a common format. Vibrotactile stimuli were delivered to the hands, which were fixed in position and concealed beneath a barrier. Saccades of different directions and amplitudes were elicited by the same somatosensory target from different initial eye positions. Both monkeys and humans served as subjects. 2. Somatosensory saccades were less accurate than visual saccades in both humans and monkeys. When the barrier concealing the hands was removed, somatosensory saccade accuracy improved. While the hands were concealed, the visual frame of reference provided by room illumination did not greatly affect saccade accuracy: accuracy was not degraded in complete darkness for two of three monkeys. 3. The endpoints of saccades to a single somatosensory target varied with initial eye position for the monkeys, but not for the human subjects. 4. We also found evidence of an effect of limb position on somatosensory saccades: when human subjects performed the task with crossed hands, the incidence of curved saccades increased. Saccades often began in the direction of the unstimulated hand and curved markedly toward the stimulated hand. When one subject was required to delay the saccade by 600-1,000 ms after target onset (the delayed saccade task), the saccades were straight. Somatosensory saccades were also straight when the hands were not crossed. 5. The reaction times of somatosensory saccades were longer than the reaction times of visual saccades, and they decreased as a function of saccade amplitude. The delayed saccade task reduced the differences between somatosensory and visual saccade reaction times. The reaction times of saccades to very dim visual targets increased into the range found for saccades to somatosensory targets. When the saccade target was the combination of the somatosensory and visual stimuli at the same location, the reaction time was slightly lower than for visual targets alone. 6. The peak velocities of somatosensory saccades were lower than those of visual saccades of the same amplitude. The velocities of saccades to combined somatosensory and visual targets were indistinguishable from those of saccades to visual targets alone. The differences between somatosensory and visual saccade velocity were maintained in the delayed trial type. These differences suggest that the main sequence or velocity-amplitude relationship characteristic of saccades depends on the modality of the target. 7. The implications of these modality-dependent differences in accuracy, reaction time, and saccade velocity are discussed with regard to models of the saccade generator and the coordinate transformation necessary for somatosensory saccades.

The effect of limb position on venous and compartmental pressure in the forelimb of ponies

The cephalic venous pressure and triceps compartmental pressure were measured in the right forelimb of anaesthetised, normotensive ponies with the limb in various positions. Compartmental pressure was only significantly higher than the control position when the leg was pushed hard forward. Venous pressure was significantly higher than the control position in three limb positions.

Isometric and isokinetic hip abductor strength in persons with above-knee amputations.

Recently introduced prosthetic socket designs for the above-knee amputee (AKA) feature a narrow medial-lateral dimension and emphasize maintenance of the residual limb in full physiologic adduction. Quantitative data on the effect of frontal plane limb position on the isometric hip abductor strength of ten otherwise healthy AKAs were obtained in the standing position. Residual limb isometric and isokinetic abductor strength was also measured and compared with that of the intact limb and with that of ten healthy age-, sex-, and height-matched control subjects using an identical technique. The testing hardware consisted of a modified Cybex II Isokinetic Dynamometer with a custom-made pelvis and trunk stabilizing device. Anthropometric measurements were taken. Results showed an essentially linear increase in residual limb abduction strength with progressive adduction from 30 degrees abduction to 16 degrees adduction. The average increase in abduction torque was .97% (range .29 to 1.5) of the peak neutral position strength per degree of change in femur angle when corrected for the effect of gravity. Similar strength increases with adduction of the femur were found for intact and control limbs. Mean residual limb isometric abduction torque measured 30% less than the intact limb value (p = .0018). The difference between the intact and the control limb mean isometric abduction torques was less than 1%. Isokinetic testing was technically more difficult than isometric testing but revealed similar weakness of the residual limb abductors when compared to the intact and control limbs.

Effect of upper limb position and loading on lumbar muscle force distribution

Effect of upper limb position and loading on lumbar muscle force distribution

Effects of initial limb position on the accuracy, reaction time and electromyographic patterns of rapid movements

An experiment was performed to determine the effects of initial limb condition on final accuracy of rapid, elbow flexion movements in the horizontal plane. Electromyographic (EMG) recordings were also taken from an agonist (biceps) and antagonist (triceps) muscle by means of bipolar surface electrodes. In the experiment the subject's forearm was passively oscillated by means of an electric motor, and when an auditory buzzer sounded, the subject was required to react as quickly as possible and rapidly move to the previously learned target angle. Thus, movements could be initiated from either static or moving starting positions. The results indicated that general accuracy was not greatly affected by these manipulations, however, constant error and pre-motor reaction time suggested that subjects may have been utilizing initial limb condition information contrary to a mass-spring view. EMG data showed that the timing characteristics of the agonist and antagonist muscles were modulated, depending on the type of movement produced, supporting an impulse-timing model (Wallace 1981).

Reflex responses of paraspinal muscles to tapping.

ERECTOR SPINAE REFLEX STUDIES IN HEALTHY SUBJECTS REVEALED TWO RESPONSES: a 12·0±1·6 ms latency, oligosynaptic response, and a 30 to 50 ms latency response with polysynaptic reflex characteristics. There was a silent period after the first and second responses. The effect of limb position, trunk, neck, postural changes, Jendrassik manoeuvre and vibration on both responses were also evaluated.

Semicontinuous blood flow measurement by triggered venous occlusion plethysmography.

ArticleSemicontinuous blood flow measurement by triggered venous occlusion plethysmography.G J Barendsen, H Venema, and J van den BergG J Barendsen, H Venema, and J van den BergPublished Online:01 Aug 1971https://doi.org/10.1152/jappl.1971.31.2.288MoreSectionsPDF (1 MB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInWeChat Previous Back to Top Next Download PDF FiguresReferencesRelatedInformation Cited ByAssessment and pathophysiology of microvascular disease: recent progress and clinical implications30 November 2020 | European Heart Journal, Vol. 42, No. 26Measurement of peripheral blood flow in patients with peripheral artery disease: Methods and considerations19 February 2018 | Vascular Medicine, Vol. 23, No. 2Blood Flow MeasurementFlow Measurement13 April 2011Effect of Different Sympathetic Stimuli–Autonomic Dysreflexia and Head-up Tilt–on Leg Vascular Resistance in Spinal Cord InjuryArchives of Physical Medicine and Rehabilitation, Vol. 91, No. 12Angiotensin II contributes to the increased baseline leg vascular resistance in spinal cord-injured individualsJournal of Hypertension, Vol. 28, No. 10Sympathetic Nonadrenergic Transmission Contributes to Autonomic Dysreflexia in Spinal Cord–Injured IndividualsHypertension, Vol. 55, No. 3Can venous occlusion plethysmography be used to measure high rates of arterial inflow?23 September 2009 | European Journal of Applied Physiology, Vol. 108, No. 2The effect of changing limb position on the validity of venous occlusion plethysmography6 July 2007 | Physiological Measurement, Vol. 28, No. 8Leg blood flow measurements using venous occlusion plethysmography during head-up tilt7 March 2007 | Clinical Autonomic Research, Vol. 17, No. 2Effects of Apneic Events on Skin Microcirculation in Preterm Newborns: Applications of Laser-Doppler-Flowmetry23 June 2016 | European Journal of Inflammation, Vol. 2, No. 3REDUCED HIGH SERUM HEPATOCYTE GROWTH FACTOR LEVELS AFTER SUCCESSFUL CARDIOVERSION IN PATIENTS WITH ATRIAL FIBRILLATIONClinical and Experimental Pharmacology and Physiology, Vol. 31, No. 3Preserved α-Adrenergic Tone in the Leg Vascular Bed of Spinal Cord–Injured IndividualsCirculation, Vol. 108, No. 19Forearm blood flow measurements using computerized R-wave triggered strain-gauge venous occlusion plethysmography: unilateral vs. bilateral measurements9 October 2008 | Clinical Physiology, Vol. 21, No. 5Atrial fibrillation impairs endothelial function of forearm vessels in humansJournal of Cardiac Failure, Vol. 7, No. 1Improvement of Bradykinin Endothelium-Mediated Vasodilation of Forearm Resistance Circulation by Quinaprilat in Patients with Coronary Artery Disease With or Without Left Ventricular DysfunctionJournal of Cardiovascular Pharmacology, Vol. 34, No. 3Impaired endothelial function in patients with nephritic range proteinuriaKidney International, Vol. 48, No. 2Peripheral Resistance Changes upon Stand-up Compared to Those upon Tilt-up and Onset to Cycling: Implication of the Cardiopulmonary ReflexLeg exchange of amino acids during exercise in patients with arterial insufficiencyClinical Physiology, Vol. 8, No. 3A microcomputer-based, R-wave triggered system for hemodynamic measurements in the forearmComputers in Biology and Medicine, Vol. 18, No. 3PLACEBO-CONTROLLED, DOUBLE-BLIND, TWO-CENTRE TRIAL OF KETANSERIN IN INTERMITTENT CLAUDICATIONThe Lancet, Vol. 326, No. 8467Blood Flow in the Calf During and After Exercise: Measurements with Doppler Ultrasound and Venous Occlusion Plethysmography in Healthy Subjects and in Patients with Arterial Occlusive Disease2 July 2016 | Angiology, Vol. 33, No. 3Arterial Blood Pressure and the Flow in the Calf at Rest and During Reactive Hyperemia2 July 2016 | Angiology, Vol. 32, No. 9PlethysmographyA continuous wave doppler velocimeter for monitoring blood flow in the popliteal artery, compared with venous occlusion plethysmography of the calfPflügers Archiv - European Journal of Physiology, Vol. 382, No. 3Strain Gauge Plethysmography in the Study of Circulation of the Limbs2 July 2016 | Angiology, Vol. 30, No. 7Measurement of Arterial and Venous Reactivity by an Advanced Strain Gauge Plethysmograph2 July 2016 | Angiology, Vol. 30, No. 8Modern Techniques of Venous Occlusion Plethysmography in the Assessment of Peripheral Vascular Disease2 November 2016 | Proceedings of the Royal Society of Medicine, Vol. 70, No. 8_supplVascular Responses with Cinnarizine to Standard Exercise in Patients with Intermittent Claudication2 November 2016 | Proceedings of the Royal Society of Medicine, Vol. 70, No. 8_supplA Comparative Study of the Reactive Hyperemia in Diabetes and Intermittent Claudication2 July 2016 | Angiology, Vol. 27, No. 3Vascular Effects of Cinnarizine in Patients with Intermittent Claudication25 June 2016 | Journal of International Medical Research, Vol. 3, No. 2The Arteriolar Effects of Cinnarizine and Flunarizine2 July 2016 | Angiology, Vol. 25, No. 4 More from this issue > Volume 31Issue 2August 1971Pages 288-91 https://doi.org/10.1152/jappl.1971.31.2.288PubMed5558253History Published online 1 August 1971 Published in print 1 August 1971 Metrics

The effect of limb position on the vasodilator response to cold in the finger.

The Journal of PhysiologyVolume 135, Issue 1 p. 93-97 ArticleFree Access The effect of limb position on the vasodilator response to cold in the finger John A. Dickson, John A. DicksonSearch for more papers by this author John A. Dickson, John A. DicksonSearch for more papers by this author First published: 23 January 1957 https://doi.org/10.1113/jphysiol.1957.sp005697Citations: 2AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume135, Issue1January 23, 1957Pages 93-97 RelatedInformation

Central pathway for direct inhibitory action of impulses in largest afferent nerve fibres to muscle.

Central pathway for direct inhibitory action of impulses in largest afferent nerve fibres to muscle.

Effect of limb position on the forces exerted about the elbow and shoulder joints on the two sides simultaneously.

ARTICLESEffect of Limb Position on the Forces Exerted About the Elbow and Shoulder Joints on the Two Sides SimultaneouslyK. A. ProvinsK. A. ProvinsPublished Online:01 Jan 1955https://doi.org/10.1152/jappl.1955.7.4.387MoreSectionsPDF (535 KB)Download PDF ToolsExport citationAdd to favoritesGet permissionsTrack citations ShareShare onFacebookTwitterLinkedInWeChat Previous Back to Top Next Download PDF FiguresReferencesRelatedInformation Cited ByMEDICAL RESEARCH COUNCIL CLIMATE AND WORKING EFFICIENCY RESEARCH UNIT31 May 2007 | Ergonomics, Vol. 1, No. 3Recent Advances in Measurement and Understanding of Volitional Muscular Strength26 December 2013 | Research Quarterly. American Association for Health, Physical Education and Recreation, Vol. 27, No. 3 More from this issue > Volume 7Issue 4January 1955Pages 387-389 https://doi.org/10.1152/jappl.1955.7.4.387PubMed13233127History Published online 1 January 1955 Published in print 1 January 1955 Metrics

The effect of limb position in seated subjects on their ability to utilize the maximum contractile force of the limb muscles

The effect of limb position in seated subjects on their ability to utilize the maximum contractile force of the limb muscles

NEURON PATTERNS CONTROLLING TRANSMISSION OF IPSILATERAL HIND LIMB REFLEXES IN CAT

NEURON PATTERNS CONTROLLING TRANSMISSION OF IPSILATERAL HIND LIMB REFLEXES IN CAT