carpals

Pisiform Bone

Pisiform Bone The structure indicated is the pisiform bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The pisiform bone is one of four bones in the proximal row of carpals (scaphoid, lunate, triquetral, pisiform). The pisiform bone is a tiny sesamoid bone located in the tendon of the flexor carpi ulnaris muscle. It articulates with the palmar surface of the triquetral bone. Learn more about the anatomy of the bones of the hand in this …

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Pisiform bone

Triquetral Bone

Triquetral Bone The structure indicated is the triquetral bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The triquetral bone is one of four bones in the proximal row of carpals (scaphoid, lunate, triquetral, pisiform). The triquetral bone is located medially in the hand and articulates with the pisiform bone, the hamate and lunate bones. On the medial aspect of the volar surface of the triquetral bone is a facet for articulation with the small pisiform …

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triquetral bone

Trapezoid Bone

Trapezoid Bone The structure indicated is the trapezoid bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The trapezoid bone is located in the distal row of carpal bones. There are four bones in the distal row: Trapezium Trapezoid Capitate Hamate It’s easy to confuse the location of the trapezoid with the adjacent and similarly named trapezium bone. A way to remember where the trapezium is located is that trapezi-UM rhymes with thUMB, and therefore articulates …

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trapezoid bone