Accessory Bones and Sesamoid Bones
Sesamoid Bones: Small Bones in Tendons
Sesamoid bones are small, round bones that develop within tendons near joints. They act as pulleys to provide a smooth surface for tendons to slide over, thus increasing the mechanical efficiency of muscles.
Accessory Bones as Sesamoid Bones
Accessory bones that are considered as sesamoid bones include Os peroneum and Os trigonum. These bones develop in tendons where there is significant pressure and help in protecting the tendons from compressive forces.
In addition to these accessory bones, there are other common sesamoid bones in the human body. The patellae, also known as the kneecaps, are the largest sesamoid bones and are present in every individual.
It is important to note that not all accessory bones are sesamoid bones. While some accessory bones like Os peroneum and Os trigonum function as sesamoid bones, others serve different purposes in the skeletal system.