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Examples of Sesamoid bones


Sesamoid bones

Post by natttt
Posted on 2011-01-13 11:20:34
Sesamoid bones are not like the other types of bones because they are in the form of nodules embedded in tendons and joint capsules. They do not possess any periosteum and their ossification also takes place after birth.

Examples of this type of bones are:

# In the knee - the patella (within the quadriceps tendon)

# In the hand - two sesamoid bones are located in distal portions of the first metacarpal bone (within the tendons of adductor pollicis and flexor pollicis brevis). There is also commonly a sesamoid bone in distal portions of the second metacarpal bone. The pisiform of the wrist is a sesamoid bone as well (within the tendon of flexor carpi ulnaris).

# In the foot - the first metatarsal bone has two sesamoid bones at its connection to the big toe (both within the tendon of flexor hallucis brevis).





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