Middle ear to sounds of higher frequency, because these are better taken up by the inner ear (which also responds to higher frequencies than those of non-mammals). The malleus, or "hammer", evolved from the articular bone of the lower jaw, and the incus, or "anvil", from the quadrate. In other vertebrates, these bones form the primary jaw joint, but the expansion of the dentary bone in mammals led to the evolution of an entirely new jaw joint, freeing up the old joint to become part of the ear. For a period of time, both jaw joints existed together, one medially and one
Ear shaping Ear shaping Ear shaping is the process of altering the shape of the human ear(s) as a body modification practice, often resulting in a non-human appearance. The medical procedure via which ears are reshaped to give a normal appearance is known as otoplasty. Ear shaping is usually performed by body modification artists. There are several ways in which human ears can be given a different appearance including cropping, pointing, and the amputation of various parts of the ear. The various methods may be combined to give specific results. In this form of ear shaping, the lobe or other portions of