The sesamoid bone is a bone embedded in the tendon or muscle. Derived from the Latin word sesamum (“sesame seed”), due to the small size of most of the sesame. Often, these bones arise in response to tension or may be present as a normal variant. The cap is the largest sesamoid bone in the body. Sesamoids act as pulleys, providing a smooth surface for tendons to slip, increasing the tendons’ ability to transfer muscle strength. Read below Sesamoid bones function.


Sesamoid bones function


One or both of the sesame-bone bones under the first metatarsophalangeal (big toe) can be multi-part – in two or three parts (mainly two-part – in two parts). (See the x-ray picture of the foot on the right.)
Fabella is a small sesamoid bone found in some mammals embedded in the side tendon of the gastrocnemius muscle behind the lateral femoral condyle. It is a variant of normal anatomy and occurs in people in 10% to 30% of people. Fabella can also be multipartite or bipartite. 


In Sesamoid bones function, Cyamella is a small sesamoid bone, which embeds in the hamstrings of the popliteal muscle. This is a variant of normal anatomy. It rarely sees in humans but is more often describes in other primates and some other animals.



sesamoid bones Structure


 The knee – patella (within the tendon of the quadriceps muscle). It is the largest sesamoidal bone.
In hand – two sesame bones are commonly found in the distal parts of the first metacarpal bone (within the tendons of adductor pollicis and flexor pollicis brevis).

The distal parts of the second metacarpal bone, the carpus bone is also common.
In the wrist – the worm of the wrist is the mammary bone (in the tendon of the elbow flexor). It begins to cure in children aged 9-12. The foot – the first metatarsal bone usually has two sesame bones in combination with the big toe (both within the hallucis brevis flexor tendon). One is on the side of the first metatarsal and the other is on the medial side. In some people, only one sesamoid is on the first metatarsal bone.



The neck – Although the hyoid bone is free floating, it is not technically a sesamoid bone. All sesame bones form directly with the connective tissue found in the tendons and ligaments. In contrast, the hyoid bone form with a cartilaginous precursor, like most other bones in the body.
The ear – the luscious process incus is the bone at first and is therefore considered the fourth ankle of the middle ear.

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