please explain this about motor neurons and myofibers?
Wednesday, February 10th, 2010 at
11:17 am
can you please explain to me and give me an example using these notes?
the more "work" that needs to be done, the more units are recruited and the more myofibers are stimulated to contract, increasing force production "size principle". generally the larger motor untis also have larger cross-sectional diameter which is usually a good indicator of strength as the more area, the more cross bridge formation.
each unit stimulates (by the action potential) a number of myofibrils. The summation of the myofibrils generates more force.
Imagine it like an army. Each motor neuron is like a colonel in charge of a regimen. The more colonels are ordered into combat, the more captains (myofibrils) you have and the more guns (crossbridges).