It is not uncommon for the ears to move.
Mammals can use their ear muscles to move the outer ear to actively receive airborne sound stimuli from different directions in the outside world, thereby sensing changes in the environment, food activity, and threats from predators. When in the process of outer ear activity, such as the detection of any environmental sound suddenly abnormal changes, will stand auricle, in order to strengthen the function of radio.
According to Darwin’s Theory of Evolution, it is hypothesized that human beings evolved from primate mammals. After a long evolutionary development of human beings, the need for applying outer ear activity to capture external sound sources gradually diminished, resulting in a weakening of this type of ear activity function, resulting in weakening of the associated nerve reflexes and muscle atrophy, and the vast majority of human beings to date do not possess this feature.
In a small number of people, the function of ear movement may be preserved due to genetic factors, or due to genetic mutation and the phenomenon of ancestry, and some of the muscles around the ear to enhance the ability to move, resulting in the performance of ear movement, which is not rare in the population, which is not a characteristic of pathologic diseases, and generally do not need to pay special attention to it.