You need to clarify the question. For a Healthcare provider chest compression are done on the chest slightly to the left and down. They must be at a depth of 2 inchs, a rate of 100-120 per minute, a comp to vent ratio of 30:2, with adequate and equal rise and fall of chest, and allowing for adequate cheat recoil. Distraction should be limited to 10 sects and under
A single motor neuron, however, can innervate many muscle fibers. The combination of an individual motor neuron and all of the muscle fibers that it innervates is called a motor unit. The number of fibers innervated by a motor unit is called its innervation ratio
