Small polygonal 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 )
A – H = carpal bones
2 ulna ( ulna )
3 metacarpal bones ( ossa metacarpalia )
The small trapezoid ( Latin trapezoid , Os carpal secundum ) is one of the eight carpal bones and distal (belongs distal ), ie metacarpal side row of short bones to.
It is wider on the back of the hand ( dorsal ) than on the palm ( palmar ). Close to the body ( proximal ) it is connected to the scaphoid bone ( os scaphoideum ) and further away from the body ( distal ) to the second metacarpal bone ( os metacarpale II ). The side ( laterally ) is the small trapezoid an articulated connection with the large trapezoid bone ( trapezium ), and to the middle ( medial ) to the capitate bone ( Os capitatum ) a.
literature
- W. Platzer: Pocket Atlas of Anatomy, Volume 1 - Musculoskeletal System . Thieme Verlag, Stuttgart 2005, p. 126. ISBN 3-13-492009-3