Sesame bone
A sesamoid bone (Latin Os sesamoideum ) is a small bone that is embedded in a tendon and provides additional distance to the bone. This creates more leverage for the tendon , so that less force is required to move the bone attached to the tendon. In addition, sesamoid bones prevent tendons from being damaged by pressure as they run over a joint .
The best-known and largest sesamoid bone is the kneecap , which is embedded in the tendon of the quadriceps femoris muscle . This construction allows the knee joint to be easily stretched without the thigh having to have any more muscle mass. Another sesamoid bone is the pea bone , a wrist bone that lies in the tendon of the flexor carpi ulnaris muscle .
Sesame bones in horses:
- Sesamoid bones ( bones sesamoidea proximalia ) two pieces between the first phalanx ( Os compedale ) and the cannon bone ( metacarpal tertium or metatarsal tertium )
- Navicular bone ( Os sesamoideum distale ) between the coffin bone ( Os ungulare ) and the coronary bone ( Os coronale )
literature
- Jochen Fanghänel (Ed.): Waldeyer Anatomie des Menschen . 17th edition, De Gruyter, Berlin 2003, ISBN 3-11-016561-9 .
- Franz-Viktor Salomon: musculoskeletal system . In the S. u. a. (Ed.): Anatomy for veterinary medicine . 2nd ext. Ed., Enke-Verlag, Stuttgart 2008, ISBN 978-3-8304-1075-1 , pp. 22-234.