As with other difficult words, I can only say a few phrases to begin a text search.
Eccentric atrophy is a phenomenon in which a decrease in the thickness or mass of organs occurs without changing their shape. This may leave empty space in the surrounding tissue. The causes of such changes are various diseases, such as tumors and inflammatory processes. Caused by changes in body contours during pregnancy, the aging process and diseases. It can be acute, for example, due to a severe bruise or blunt trauma, or chronic, caused by previous spinal diseases. Eccentric atrophy of the pelvic limbs is called asynergia. This is a change in the tone of the spinal cord, which can lead to deterioration in coordination of movements. When a certain part of the body becomes the cause of the development of the atrophic process, a projection reflex or compression of the nerve passing through the spine is formed.