The soft covering of the SKULL on the top of the head. It consists of five layers, which from the surface inwards are as follows: the skin, from which grows hair; next a subcutaneous layer of fat; thirdly, a tough fibrous membrane known as the epicranium; fourthly, a loose layer of connective tissue attaching the epicranium to the deepest layer, and permitting the free movement of the scalp; and, finally, another fibrous layer clinging closely to the skull, and known as the pericranium.