Upper Limb

Arm (# of total bones, structures and # of bones in structures)

Arm has 30 bones, humerus, ulna, radius, 8 carpals, 19 metacarpals/digitals

Humerus Features

Projections and fossa for bone articulation and muscle attachments - greater/lesser tubercle, capitulation, trochlea, coronoid fossa, olecranon fossa

Ulna and Radius Characteristics and How They Connect

Bones connected by interosseus membrane, proximal and distal radioulnar joints - proximally, head of radius with radial notch of ulna, distally, head of ulna with ulnar notch of radius

Ulna Characteristic and Strucuteral Features

Longer and medial to radius, olecranon, coronoid process, trochlear notch, styloid process, ulnar Tuberosity

Radius Characteristics and Features

Contributes to wrist joint motion, has a head, neck, radial, Tuberosity, and styloid process

Olecranon and Olecranon Fossa

large proximal end of ulna, tip of elbow, fossa allows olecranon process from ulna to attach

Capitulum Location and Function

Humerus, articulates with head of radius

Trochlea Location and Function

Humerus, receives trochlea notch form ulna to allow flexion and extension of elbow (medial to capitulum)

Coronoid Fossa Location and Function

Humerus, receives coronoid process of ulna

Trochlear Notch

Receives trochlear from humerus

Coronoid Process Function

Primary elbow joint stabilizer, prevents posterior dislocation

What Main Bones are in the Hand

Carpus, metacarpus, phalanges

Bones of Carpus And Sections They’re in

Proximal - scaphoid, lunate, triquetrum, pisiform

Distal - trapezium, trapezoid, capitate, hamate

Mnemonic for Carpus Bones

Sally left the part to take Carmen home - scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate

Bones of the Metacarpals and Phalanges

5 metacarpals - #s 1-5, lateral to medial

14 phalanges - 2 in Pollux, 3 in each finger, each phalanx has base, shaft, and head

Names of Hand Joints

Carpometacarpal, metacarpophalangeal, metaphalangeal