Sesamoid bones
* Are round or oval bones that develop in
tendons ( or small nodules that are found in certain tendons ).
* The function is to reduce friction on the tendon, and can also alter the direction of pull a tendon.
* Examples:
* The function is to reduce friction on the tendon, and can also alter the direction of pull a tendon.
* Examples:
·
In the knee - the patella bone (within the quadriceps tendon).
This is the largest sesamoid bone.
·
In the wrist - The pisiform bone (within the tendon of flexor
carpi ulnaris).
·
In the foot - the planter surface of the head metatarsal 1st bone
usually has two sesamoid bones at its connection to the big toe (both within
the tendon of flexor hallucis brevis).
Sources :
- Snell anatomical book, 8 Edition ( 33 - 34 - 600 ) .
- Grants anatomical book, 13 Edition ( 447 - 451 - 475 ) .
- Atlas of Human Anatomy, 6 Edition- Frank H. Netter, M.D ( Plate 439 - 443 - 511 - 521 ) .
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