• Sesamoid bones are small, round bones embedded within tendons.
• Location: Found in areas where tendons pass over joints.
• Unlike long bones, sesamoid bones lack a medullary cavity and haversian system.
(Mnemonic: Medha)
• Med - Medullary cavity
• ha - Haversian system
|
Sesamoid Bone |
Associated Tendon |
Location |
|
Patella cubiti |
Triceps brachii |
Near elbow joint |
|
Pisiform |
flexor carpi ulnaris (FCU) |
Wrist joint |
|
Fabella |
Lateral head of the gastrocnemius muscle |
Posterior to the knee joint |
|
First metatarsal sesamoids (two sesamoid bones) |
Flexor hallucis brevis |
Under the 1st metatarsophalangeal (MTP) joint of the big toe |
Figure- Sesamoid bone (Flexor hallucis brevis; FHB)