Motor Unit Skeletal Fibers Diagram. A motor unit consists of a single motor neuron and the muscle fibers innervated by it. Cross more both motorunits and the α motor neurons themselves vary in size.
Skeletal muscle fibers can be quite large for human cells with diameters up to 100 μm and lengths up to 30 cm 118 in in the sartorius of the upper leg. Muscles do this by a process called summation specifically by motor unit summation and wave summation. Figure 1022 muscle fiber.
Motor unit skeletal fibers diagram.
A muscle fiber is composed of many myofibrils which contain sarcomeres with light and dark regions that give the cell its striated appearance. Yes so 1 motor unit might be a type 1 and then that will only innervate the type 1 skeletal muscle fibers which are the slow oxidative. Figure 1022 muscle fiber. One motor nerve plus all of the fibers that it innervates is called a motor unit.