Muscle contraction is the activation of tension-generating sites within muscle cells. In physiology, muscle contraction does not necessarily mean muscle...

fiber. Smooth muscle cells control involuntary movements such as the peristalsis contractions in the esophagus and stomach. The Smooth muscle has no myofibrils...

the basic functional, contractile units of the muscle fiber necessary for muscle contraction. Muscles are predominantly powered by the oxidation of fats...

multiunit smooth muscle. Smooth muscle differs from skeletal muscle and cardiac muscle in terms of structure, function, regulation of contraction, and excitation-contraction...

to or interference with the different stages of muscle contraction. There are two main causes of muscle fatigue: the limitations of a nerve’s ability to...

The sliding filament theory explains the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement. According...

muscles, but nonetheless arise through activation of the central nervous system, albeit not engaging cortical structures until after the contraction has...

disease called tetanus) is a sustained muscle contraction evoked when the motor nerve that innervates a skeletal muscle emits action potentials at a very high...

sudden involuntary contraction of a muscle, a group of muscles, or a hollow organ, such as the bladder. A spasmodic muscle contraction may be caused by...

case of TENS, the current is usually sub-threshold, meaning that a muscle contraction is not observed.[original research?] For people who have progressive...

striated skeletal muscle cells, GLUT4 concentration in the plasma membrane can increase as a result of either exercise or muscle contraction. During exercise...

the production of an electrical impulse (action potential) to the contraction of muscles in the heart. This process is of vital importance as it allows for...

and titin is an elastic protein. The myofilaments act together in muscle contraction, and in order of size are a thick one of mostly myosin, a thin one...

twelfth rib. Contraction of one of the pair of muscles causes lateral flexion of the lumbar spine, elevation of the pelvis, or both. Contraction of both causes...

slide past each other in a process called excitation-contraction coupling. Diseases of the heart muscle known as cardiomyopathies are of major importance...

isotonic contraction, tension remains the same, whilst the muscle's length changes. Isotonic contractions differ from isokinetic contractions in that in...

of small muscle fibers. Each fiber comprises many tiny strands called fibrils, impulses from nerve cells control the contraction of each muscle fiber. Skeletal...

usually radiates from the lower back of the head, the neck, eyes or other muscle groups in the body typically affecting both sides of the head. Tension-type...

Isolytic contraction is when a muscle contracts while external forces cause it to lengthen. For example, during a controlled lowering of the weight in...

along the length of the myofibril in sections or units of contraction called sarcomeres. Muscles contract by sliding the thick myosin, and thin actin myofilaments...

A fasciculation, or muscle twitch, is a spontaneous, involuntary muscle contraction and relaxation, involving fine muscle fibers. They are common, with...

The actions of the six muscles responsible for eye movement depend on the position of the eye at the time of muscle contraction. Since only a small part...

why these intermittent uterine muscle contractions may be occurring. The first is that these early “practice contractions” could be helping to prepare the...

motor neuron and a muscle fiber. It allows the motor neuron to transmit a signal to the muscle fiber, causing muscle contraction. Muscles require innervation...

independence, in probability Contraction (logic), a structural rule in proof theory Muscle contraction, the physiological condition of a muscle which generates tension...

access to the actin cross-bridge binding sites, permitting muscle contraction. Muscle contraction ends when calcium ions are pumped back into the sarcoplasmic...

the cell, causing a depolarization of the end plate, resulting in muscle contraction. Following depolarization, the acetylcholine molecules are then removed...

eccentric contraction is the motion of an active muscle while it is lengthening under load. Eccentric training is repetitively doing eccentric muscle contractions...

during rhythmic contraction actually increases blood flow through the muscle, and may be responsible for a portion of the increase in muscle blood flow immediately...

arrector pili muscles, also known as hair erector muscles, are small muscles attached to hair follicles in mammals. Contraction of these muscles causes the...