Medically reviewed by Jennifer Steinhoff, MD The humerus is your upper arm bone. It is the longest bone in the upper part of ...

When the spine bends or rotates, the spinal discs allow for smooth movement between each adjacent vertebrae and reduce friction between the bones ... head toward their shoulder. Gently tense the ...

Medically reviewed by Sukaina Hasnie, MD The malleus is a hammer-shaped bone in the middle ear. It is also known as the ...