Identification of Humerus, Radius, and Ulna Anatomy

Humeral Head

Proximal end of the humerus, articulates with scapula.

Anatomical Neck

Region between the humeral head and greater tubercle.

Surgical Neck

Common fracture site below the humeral head.

Greater Tubercle

Lateral projection for muscle attachment on humerus.

Lesser Tubercle

Medial projection for muscle attachment on humerus.

Intertubercular Groove

Groove between greater and lesser tubercles for tendon.

Deltoid Tuberosity

Roughened area on humerus for deltoid muscle attachment.

Radial Sulcus

Groove on humerus for radial nerve passage.

Olecranon Fossa

Posterior depression for olecranon of ulna.

Coronoid Fossa

Anterior depression for coronoid process of ulna.

Radial Fossa

Lateral anterior depression for radial head.

Capitulum

Rounded lateral condyle of humerus for radius.

Trochlea

Medial condyle of humerus for ulna articulation.

Lateral Epicondyle

Projection on humerus for lateral muscle attachment.

Medial Epicondyle

Projection on humerus for medial muscle attachment.

Radial Head

Proximal end of radius, articulates with humerus.

Radial Neck

Narrow region below the radial head.

Radial Tuberosity

Bump on radius for biceps tendon attachment.

Interosseous Crest

Border of radius for interosseous membrane attachment.

Ulnar Notch

Medial indentation on radius for ulna articulation.

Radial Styloid Process

Distal projection of radius, stabilizes wrist.

Dorsal Tubercle

Bump on distal radius for tendon passage.

Trochlear Notch

C-shaped notch on ulna for humeral articulation.

Olecranon Process

Posterior projection of ulna, forms elbow.

Guiding Ridge

Ridge on ulna for stability during movement.

Coronoid Process

Anterior projection of ulna, fits into humerus.

Radial Notch

Lateral notch on ulna for radius articulation.

Ulnar Tuberosity

Bump on ulna for biceps tendon attachment.

Interosseous Border

Edge of ulna for interosseous membrane attachment.

Ulnar Head

Distal end of ulna, articulates with wrist.

Ulnar Styloid Process

Distal projection of ulna, stabilizes wrist.

Scapula

Shoulder blade, connects humerus to thorax.

humeral shaft

long, narrow part of the bone

olecranon fossa

located on the posterior side of the distal end of the humerus superior to the trochlea and articulates with the olecranon process of the ulna

Radial body (shaft)

Humerus

upper arm bone, largest bone in upper limb

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how many ossification does humerus have

articulates with glenoid fossa of scapula, distally with radius and ulna

Humerus articulates with.....

rounded articular head at proximal end, shaft, and irregular distal end

humerus compromised of a.....

Radius

shortest of 3 arm bones, named for its action creating a turning movement around capitulum of the humerus

humerus at capitulum and medially with ulna on both proximal and distal ends. Distally radius articulates with 2 carpal bones of the wrist(lunate and scaphoid).

radius articulates proximally with.....

3: shaft, proximal epiphysis, and distal epiphysis

how many ossifications does radius have

Ulna

longest thinnest bone of forearm, with U shape proximal articulation and distal articulation provides freer rotation of hand

trochlea of humerus and the head of radius, distally articulates with ulnar notch of radius and articular disk separates from carpal bones

ulna articulates proximally with.....

3: shaft, proximal epiphysis, and distal epiphysis

how many ossifications does ulna have