Calvaria, also known as the calvarium, is a term used in anatomy to refer to the upper dome-like part of the skull that encloses and protects the brain. It is composed of several bones, including the frontal, parietal, and occipital bones. The calvaria is also commonly referred to as the skullcap.
The word "calvaria" finds its origins in Latin, where it translates to "skull" or "bald head." It is derived from the Latin word "calva," meaning "skull" or "hairless." The term accurately describes the rounded shape and hairless nature of this upper structure of the skull.
The calvaria plays a crucial role in safeguarding the delicate brain and its surrounding structures. It provides a rigid and protective frame, shielding the brain from external forces and injuries. Additionally, it contributes to the overall structural integrity of the skull.
Anatomically, the calvaria consists of multiple plates of bone interconnected by sutures, which allow for some flexibility and growth during development. However, in adulthood, the sutures become more tightly fused together, resulting in a solid and immovable structure.
The presence of fontanelles, or soft spots, in infants allows for further flexibility and expansion of the calvaria during childbirth and early growth. These fontanelles eventually close and fuse as the skull develops and matures.
In summary, "calvaria" refers to the upper, dome-like portion of the skull that protects the brain. It consists of several bones and plays a pivotal role in safeguarding the central nervous system.
