1 The rate at which the unstable radioactive C-14 isotope decays into the stable non-radioactive N-14 isotope, 2  The ratio of C-12 to C-14 found in a given specimen,  And the ratio C-12 to C-14 found in the atmosphere at the time of the specimen's death.
Regaining muscle after atrophy should be done under the guidance of a physician and physical therapist to prevent any further injury, which may result in even greater atrophy. It is important that you consult with a physician to determine the exact reason for your muscle atrophy.ractice patience and start slowly. One of the biggest challenges that you may face while attempting to rebuild muscle is overcoming the realization that your body is not physically capable of the feats it used to be prior to atrophy. You will have to gradually work up to your fitness goals again.
Disuse atrophy is temporary if a muscle is exercised after it is taken out of a cast. However, extreme disuse of a muscle results in muscular atrophy in which there is a permanent loss of skeletal muscle fibers and the replacement of those fibers by connective tissue.uscle disorders are caused by disruption of normal innervation, degeneration and replacement of muscle cells, injury, lack of use or disease. Atrophy. Muscular atrophy refers to a decrease in size of muscles. Individual muscle fibers decrease in size, and there is a progressive loss of myofibrils.