Search results
Results From The WOW.Com Content Network
Once the foot is flat on the ground, the hip gradually extends in preparation for weight acceptance as the whole-body moves forward over the stance foot. Between 30-50% of the gait cycle, the hip flexor muscles are eccentrically acting as the hip continues to extend, until reaching maximal extension at approximately 10-15 degrees past neutral. [3]
The gluteus medius is very important during the stance phase of the gait cycle to maintain both hips at the same level. One leg stance accounts for about 60% of the gait cycle, and during the stance phase, there is approximately three times the body weight transmitted to the hip joint.
A mature walking pattern is characterized by the gait cycle being approximately 60% stance phase, 40% swing phase. [18] Initiation of gait is a voluntary process that involves a preparatory postural adjustment where the center of mass is moved forward and laterally prior to unweighting one leg. The center of mass is only within a person's base ...
Trendelenburg gait, first described by Friedrich Trendelenburg in 1895, [1] is an abnormal human gait caused by an inability to maintain the pelvis level while standing on one leg. It is caused by weakness or ineffective action of the gluteus medius and gluteus minimus muscles.
[5] [7] As in many other animals, the muscles activate late in the lengthening phase of the muscle strain cycle, just prior to muscle shortening which is a pattern believed to maximize work output from the muscle. Terrestrial Locomotion: EMG recordings show a longer absolute duration and duty cycle of muscle activity during locomotion on land. [5]
The popliteus muscle in the leg is used for unlocking the knees when walking, by laterally rotating the femur on the tibia during the closed chain portion of the gait cycle (one with the foot in contact with the ground). In open chain movements (when the involved limb is not in contact with the ground), the popliteus muscle medially rotates the ...
The second half of the test involved subjects performing a 100-m sprint on a man-made track using radar to measure the forward speed of runners to create velocity-time curves. The main result of this study showed that the force application technique (rather than simply the total amount of force applied) is the key determinant factor in ...
The spinal cord executes rhythmical and sequential activation of muscles in locomotion. The central pattern generator (CPG) provides the basic locomotor rhythm and synergies by integrating commands from various sources that serve to initiate or modulate its output to meet the requirements of the environment.