The sphenoid bone is one of the most complex bones in the human body. It is often described as being butterfly-shaped and is located in the middle of the skull. There are several synonyms for the sphenoid bone, including the sphenoidal bone, os sphenoidale, and wedge bone. The sphenoid bone plays a vital role in protecting the brain and also makes up a significant portion of the skull base. It is also important for providing support for the eyes and enabling various muscles to move. A number of different medical conditions can affect the sphenoid bone, including tumors, fractures, and infections.