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Electromyography (EMG) is a technique for evaluating and recording the electrical activity produced by skeletal muscles. [ 1 ][ 2 ] EMG is performed using an instrument called an electromyograph to produce a record called an electromyogram. An electromyograph detects the electric potential generated by muscle cells [ 3 ] when these cells are ...
In general, fatigue protocols have shown increases in EMG data over the course of a fatiguing protocol, but reduced recruitment of muscle fibers in tests of power in fatigued individuals. In most studies, this increase in recruitment during exercise correlated with a decrease in performance (as would be expected in a fatiguing individual).
Henneman’s size principle describes relationships between properties of motor neurons and the muscle fibers they innervate and thus control, which together are called motor units. Motor neurons with large cell bodies tend to innervate fast-twitch, high-force, less fatigue-resistant muscle fibers, whereas motor neurons with small cell bodies ...
Electromyography (EMG) Electromyography is the measurement and analysis of the electrical activity in skeletal muscles. This technique is useful for diagnosing the health of the muscle tissue and the nerves that control them. [8] EMG measures action potentials, called Motor Unit Action Potentials (MUAPs), created during muscle contraction.
Electrical muscle stimulation. Electrical muscle stimulation (EMS), also known as neuromuscular electrical stimulation (NMES) or electromyostimulation, is the elicitation of muscle contraction using electric impulses. EMS has received an increasing amount of attention in the last few years for many reasons: it can be utilized as a strength ...
Neuromuscular junction. The neuromuscular junction is a specialized synapse between a neuron and the muscle it innervates. It allows efferent signals from the nervous system to contract muscle fibers causing them to contract. In vertebrates, the neuromuscular junction is always excitatory, therefore to stop contraction of the muscle, inhibition ...
Glycogen storage disease type V. Poor physical or mental health due to prolonged delay in diagnosis, misdiagnosis, or having been given inappropriate exercise advice. Rare complications include rhabdomyolysis with myoglobinuria requiring hospitalization, transient muscle contracture, and compartment syndrome. Genetic testing (preferred), muscle ...
During gait, high heeled shoes are shown to affect the ankle joint, causing significantly increased plantarflexion. This, in turn, increases the metabolic costs of walking and leads to faster muscle fatigue. Accelerated muscle fatigue may then increase the likelihood of ankle sprains and or falls due to impaired foot and ankle stability.