A twitch is the rapid rise and fall in force produced by a muscle fiber after a single action potential.
twitch
muscle twitch
muscle twitch
Single action potentials follow the "all or none" rule. That is, if a stimulus is strong enough to depolarize the membrane of the neuron to threshold (~55mV), then an action potential will be fired. Each stimulus that reaches threshold will produce an action potential that is equal in magnitude to every other action potential for the neuron. Compound action potentials do not exhibit this property since they are a bundle of neurons and have different magnitudes of AP's. Thus compound action potentials are graded. That is, the greater the stimulus, the greater the action potential.
it's called a prime mover
Blackhawk.
Generally not as there are many parallel fibres that are part of the same circuit and some sort of coordination between the fibres are needed before a muscle twitch can be detected. This is either temporal or spatial summation.
A Colt single action army (Pre-War) with the serial # 305068 would have been produced around 1908.
It was produced in 1958.
Produced in 1964.
Each muscle cell is only innervated by a single motor neuron, but each motor neuron innervates any number of muscle cells. When an action potential travels down the axon of an alpha motor neuron, it will depolarize several muscle cells at the same time, a phenomenon known as summation.
It was produced in 1958.
a muscle which crosses a single joint refers to a single joint muscle.