Pea bone

Wrist (schematic):
A – H = carpal bones

A scaphoid bone ( scaphoid bone )

B moon bone ( os lunatum )

C triangular bone ( os triquetrum )

D pea bone ( os pisiforme )

E large polygonal bone ( trapezium )

F small polygonal bone ( os trapezoideum )

G headbone ( os capitatum )

H hook bone ( os hamatum )

1 spoke ( radius )
2 ulna ( ulna )
3 metacarpal bones ( ossa metacarpalia )

Drawing of the left pea leg showing the articular surface that is articulated with the triangular leg.

The round Pisiform ( lat. Pisiform , even accessory carpal bone of "additional carpal bones") is the smallest of the eight carpal bones of vertebrates and the proximal part ( proximal ) series of short bones to.

It is located at the side ( lateral ) and away from the body ( distal ) of the ulna ( ulna ). At the end of the little finger ball that is close to the body , the pea bone can be easily felt from the outside through the skin and during the rotational movements of the forearm ( pronation and supination ) it can be found on the triangular bone ( os triquetrum ), with which it forms an articulated connection on the back of the hand ( dorsal ) , to move back and fourth. The pea bone is embedded in the tendon of the flexor carpi ulnaris muscle and is one of the so-called sesamoid bones .

swell

• J. Fanghänel (Ed.): Waldeyer Anatomie des Menschen . de Gruyter 2003, 17th edition, p. 666 ff. ISBN 3-11-016561-9
• W. Platzer: Pocket Atlas of Anatomy, Volume 1 - Musculoskeletal System . Thieme Verlag, Stuttgart 2005, p. 126. ISBN 3-13-492009-3
• Hermann Voss, Robert Herrlinger: Taschenbuch der Anatomie, Volume 1 - Introduction to anatomy, musculoskeletal system . Gustav Fischer Verlag, Stuttgart 1963, 12th edition, p. 55 ff.