In anatomy, a sesamoid bone (/ˈsɛsəmɔɪd/) is a bone embedded within a tendon.
Sesamoids are found in locations where a tendon passes over a joint, such as the hand, knee, and foot. Functionally, they act to protect the tendon and to increase its mechanical effect. The presence of the sesamoid bone holds the tendon slightly farther away from the center of the joint and thus increases its moment arm. Sesamoid bones also prevent the tendon from flattening into the joint as tension increases and therefore also maintain a more consistent moment arm through a variety of possible tendon loads. This differs from menisci, which are made of cartilage and rather act to disperse the weight of the body on joints and reduce friction during movement.
Other articles related to "sesamoid bone, sesamoid bones, bone, bones":
... In equine anatomy, the term sesamoid bone usually refers to the two sesamoid bones found at the back of the fetlock or metacarpophalangeal/metatarsophalangeal ... Strictly these should be termed the proximal sesamoid bones whereas the navicular bone should be referred to as the distal sesamoid bone ... The patella is also a form of sesamoid bone in the horse ...
... A triangularly shaped piece of bone about two and a half inches long was broken from the lower end of the cannon bone and was considerably displaced ... The inner sesamoid bone was completely shattered and the rim of the top of the main pastern bone was damaged ... It seemed likely that the inner sesamoid bone was the first to break with the result the next step the fetlock was not braced and the foot and the pastern were pointing outwards ...
... It inserts to the radial sesamoid bone and the proximal phalanx of the thumb ... the deep head originates on three carpal bones the trapezium, trapezoid, and capitate ... The muscle is inserted onto the radial sesamoid bone of the metacarpophalangeal joint ...
... back part only) deeper structures of the foot (digital cushion, back third of the coffin bone, lateral cartilages, navicular bone and bursa, deep flexor tendon and its sheath) This block is one technique used ... and lateral palmar nerves near the base of the sesamoid bones desensitizes the entire foot and at least half of the pastern ... Blocking above the sesamoid bones may desensitize part of the fetlock and sesamoid bones with variable success ...
Famous quotes containing the word bone:
“Sang a bone upon the shore;
A man if I but held him so
When my body was alive
Found all the pleasure that life gave:
A bone wave-whitened and dried in the wind.”
—William Butler Yeats (18651939)