Bones of the Arm

humerus

bone extending from the shoulder to the elbow

capitulum

bump opposite the trochlea, rounded, lateral and distal (humerus)

coronoid fossa

anterior surface, distal end, indentation above trochlea (humerus)

greater tubercle

rough part of shaft on the lateral side, quarter of the way down the shaft (humerus)

head

the rounded ball shaped part of the humerus

lateral epicondyle

distal end of the humerus, smaller bump

lateral supracondylar crest

runs above lateral condyle on the humerus, ridge of bone

lesser tubercle

bump on the anterior surface of the head (humerus)

medial epicondyle

distal end of the humerus, larger bump, same side as ball of head

medial supracondylar crest

runs above medial condyle on the humerus, ridge of bone

nutrient foramen

small hole on the shaft of the long bones

olecranon fossa

distal end of the humerus, posterior side, large indentation

radial fossa

smaller / shallow dent above the capitulum of the humerus, distal end, anterior surface

spiral groove

twisty part of humerus shaft

shaft

main part of the long bones

trochlea

half of a spindle shape bump, medial / distal end of the humerus

radius

lateral lower arm bone, 'connects' to thumb

distal radial articular surface

suface of the radius that connects to the wrist

dorsal tubercle

large bump on the posterior surface of the distal end, radius

head

the rounded smaller portion of the radius that connects to the capitulum, shaped like a red blood cell

interosseous crest

sharp edge of the radius shaft, medial, faces the ulna

neck

pushed in portion just below the head of the radius

radial tuberosity / bicipital tuberosity

bumped out portion on the radius just below the neck/head, anteior and medial

styloid process

on the distal surface of the radius, most protruding part of the triangle

ulnar notch

medial side of the distal surface of the radius, indentation

ulna

medial lower arm bone

coronoid process

bottom part of the moon shap on the ulna

extensor carpi ulnaris groove

indentation next to the styloid process of the ulna, distal end

interosseous crest

sharp edge of the ulna shaft, lateral, faces the radius

olecranon process

upper part of the moon shape on the ulna

radial notch

groove near the the bottom of the moon shape, lateral articulation surface

styloid process

pointy bit on the distal end of the ulna, heel on boot

trochlear notch

half-moon indentation of the ulna