Identification of Carpal and Metacarpal Bones

carpal bones?

Scaphoid, lunate, triquetral (triquetrium), pisiform, trapezium, trapezoid, capitate, hamate.

scaphoid tubercle

A prominent bump on the scaphoid bone that serves as an attachment point for ligaments.

pisiform body of pisiform

The pisiform bone itself is a sesamoid bone that articulates with the triquetral bone.

trapezial ridge

A ridge on the trapezium bone that provides attachment for ligaments.

Parts of the Metacarpal Bones

Base, shaft, and head.

MC1-thumb

MC1 is the metacarpal bone of the thumb, which is typically shorter and thicker than the others.

types of phalanges (hand)

Proximal phalanges, intermediate phalanges, and distal phalanges.

tuft

The tuft is the distal end of the distal phalanx, often expanded and rounded.

Palmar/anterior

palm side of hand

pronation

turning the palm downward

Supination

turning the palm upward

dorsal/posterior

back side of hand

shaft of metacarpal

head of metacarpal

proximal phalanges

intermediate phalanges

distal phalanges

capitate head

capitate base

Hamulus of hamate

thumb proximal phalanges

thumb distal phalange

Scaphoid

Lunate

Triquetrum

Pisiform

Trapezium

Trapezoid

Capitate

Hamate

Metacarpals

The thumb is lacking what phalange?

Intermediate

hand

Hands evolved from ancestorial fish fin, based on jointed bony rays

hand

base of small wrist bones(carpals), foundation for the digits, composed of a large proximal segment (metacarpals) and a chain of additional bones(phalanes)

hand

5 digit form

hand

-composed of 27 bones

-3 main groups

carpals (8)

metacarpals(5)

phalanges(14)

*proximal(5)

*intermediate(4)

distal(5)

proximal

toward the midline/head

distal

away from the midline

medial/ulnar

little finger side

lateral/radial

thumb side

carpals

ossify from 1 center