Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 39 for “"isometric force"”.
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Neuromuscular responses to an isometric force and position task during passive hyperthermia
… sought to compare neuromuscular responses of an isometric force and position task during passive hyperthermia, and the relative contributions of rectal (Tre) and skin (T ̅sk) temperature afferents. Surface electromyography (sEMG) was used to assess the electrical activity of the flexor carpi …
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The Relationship between Isometric Force Characteristics and Vertical Jump Height under Various Loading Conditions.
… to examine the relationship between isometric force characteristics (IF) and vertical jump height under various loading conditions. Sixty-three collegiate athletes participated in this investigation. Athletes performed static jump (SJ) and countermovement jumps (CMJ) with 0 and 20kg, …
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Maximum Isometric Force Production Characteristics in Five Muscle Groups in Physically Active Young, Middle-Aged, and Older Men
… function was assessed in terms of the static force production capacity of the finger flexors, thumb abductors, forearm extensors, plantar flexors and dorsiflexors, reflected by variables representing parameters of force, time, rate of force production, and cumulative force over time (impulse). …
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Age-related maximal voluntary isometric force production characteristics of six muscle groups in women ranging in age from 25 to 74 years
… to determine the age related maximal voluntary isometric force production characteristics in women ranging in age from 25 to 74 years. The subjects (N = 143) were grouped into ten five-year age groups with 13 to 16 subjects in each group. Variables representing parameters of force, time, …
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Cardiovascular responses to sustained isometric force production of the finger flexor and knee extensor muscle groups in weight-trained and untrained young men
… whether the cardiovascular responses to isometric force production differed significantly between weight-trained and untrained men. Thus, the cardiovascular responses to sustained isometric force production were investigated in 17 weight-trained (age = 23.5 $\pm$ 2.9 yrs.) and 17 …
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Development of a virtual reality video game using principal component analysis to map isometric force efforts for haptic feedback: A proof of concept
… The game is played by interacting with a force/torque sensor mounted onto the end effector of the robot and force feedback is given real time as participants aim to match force targets in a lower dimensional space. Preliminary results of a typically developing child indicate lower error …
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The effect of subconcussive blows on fine motor control
… Purdue pegboard task, finger tapping task and an isometric force control task. Group differences in test performance were assessed using a t-test and a 3-way ANOVA with repeated measures. RESULTS: Data analysis revealed differences in between athletes and non-athletes in the finger tapping test. …
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The impact of physical activity on statin-associated skeletal muscle myopathy
… (WT) mice on muscle function (grip strength, isometric force, and daily activity level), markers of mitochondrial content (mtDNA and PGC1-α), skeletal muscle oxidative stress (4HNE), and protein degradation (atrogin-1). METHODS: Mice were divided into three different activity groups, sedentary …
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Proteomic analysis of diurnal variation in human skeletal muscle performance
… in many instances, measureable changes in force output or contractility occur in the absence of any change in myosin heavy chain profile. Therefore, more sophisticated analysis is required. Proteomic techniques including 2-dimensional gel electrophoresis, high- performance liquid …
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The re-education of upper limb movement post stroke using iterative learning control mediated by electrical stimulation
… (FMA) and the Action Research Arm Test (ARAT), isometric force and error tracking. The intervention for stroke participants consisted of eighteen sessions in which a similar range of tracking tasks were performed with the addition of responsive electrical stimulation to their triceps muscle. A …
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Effects of seated posture on static strength, lower-body isometric muscle contractions, and manual tracking performance
… of the following variables: (1) static force generation capabilities on an isometric force-stick; (2) lower-body isometric muscle contractions used in anti-gravity straining maneuvers (AGSMs); and (3) tracking performance for a manual tracking task. The purpose of this research is to …
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Contractile Performance and Energy Utilization of Skeletal Muscle; Creatine Kinase and Acto-myosin ATPase
… PCr can alter contractile performance (maximal isometric force and Ca²⁺ sensitivity). Based on this evidence, CK and A‧M‧ATPase may be coupled in skeletal muscle. Therefore the purpose of this investigation was to determine the influence of the CK system on contractile performance and energy …
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Investigation of the interaction between corticomuscular coherence, motor precision and perceived difficulty in wrist flexion and extension
… precision) differences were reported between isometric wrist flexion and extension. Neurophysiological as well as clinical differences have also been reported between these antagonistic movements. Corticomuscular coherence (CMC), i.e. the frequency specific temporal coupling between the …
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Factors determining 200-m kayak performance: Muscle strength, aerobic capacity, stroke kinematics and training
200-m sprint kayaking requires repeated cyclic force production, and athletes typically incorporate resistance training programs aimed at improving muscular strength and power and the ability to produce high forces over the course of the race (i.e. 31-40 s). Whilst upper body strength and …
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Measurement of finger coordination during a motor learning task
… in healthy subjects, over time in a series of isometric force control learning tasks. During a series of trials with real-time visual feedback of the five finger forces, subjects adapted their grasp strategy in order to reach the target in a time efficient manner. In early trials, it is very …
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Linearity, motor primitives and low-dimensionality in the spinal organization of motor control
… experimentally that spinally induced force production in the frog limb is linear in stimulation. Spinally encoded force fields have also been implicated as building blocks for generating hind limb movements. Furthermore, muscle EMG measurements for both intact and spinalized animals, …
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Role of MicroRNAs in Human Skeletal Muscle Tissue Engineering In Vitro
… differentiation, elevation of active contractile force amplitudes, and increasing Type II myofiber formation in vitro. </p><p>The global hypothesis that motivated this research was that joint inhibition of miR-133a and miR-696 in isolated primary human skeletal myoblasts would lead to accelerated …
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Myocardial force and intracellular Ca2+ in an animal model of hypertensive heart failure
… between intracellular calcium ([Ca2+]i) and isometric force during the relatively narrow time frame in which long-standing compensated hypertrophy progresses to decompensated end-stage heart failure in an animal model of human essential hypertension. In order to carry out this aim, left …
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The role of feedback and age-related differences in force production accuracy, variability, and shape across oral and manual effectors
… 1) to determine the role of feedback in force production accuracy, variability, and shape and 2) to determine whether sensory feedback mediates age-related difference in force production accuracy, variability, and shape across effectors. The premise of these experiments was that the type …
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On contractile force developed by the Spasmoneme, a biological spring of a peritrich ciliate Vorticella convallaria
… in a few milliseconds generating the contractile force in the order of 10 nN. The spasmoneme, the contractile organelle inside the stalk, is a mechanochemical engine employing calcium ions as the energy source. In this thesis, I evaluate the lower and upper bounds of the contraction force of the …
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