The arm Flashcards
Rotated, superior end of humerus that articulates with the glenoid fossa. Faces medially
Humeral head
Attachment point on humerus for rotator cuff muscles, lateral surface of humerus
Greater tubercle
Attachment point for subscapularis muscle which rotates the arm medially, humerus
Lesser tubercle
Groove between humerus tubercles, houses the tendon that connects to biceps muscles
Inter tubercular sulcus
Rough, raised ridge of bone of the anterior humerus mid shaft that serves as a point of attachment for the deltoid muscle
Deltoid tuberosity
Spool shaped distal end of humerus, articulates with ulna, flared ends and narrow in middle
Trochlea
Medial, distal projection of humerus. Swoops towards the middle
Medial epicondyle
Lateral, distal projection of humerus, not as pronounced
Lateral epicondyle
Smooth rounded area on distal anterior surface that articulates with the head of radius. Lateral and distal, rounded, humerus
Capitulum
Large hollow on anterior, distal end of humerus, received the ulna during flexion. Concave surface on the anterior distal end that accommodates the ulna as it slides into the fossa
Coronoid fossa
Large hollow on distal, posterior surface of humerus. Articulates with ulna during extension. Hollow, larger than coronoid.
Olecranon fossa
Most proximal part of ulna, massive, blunt process. Triceps muscle attached here. Proximal and posterior
Olecranon process
Lower medial arm bone
Ulna
Superior arm bone
Humerus
Articulates ulna with the Trochlea of the humerus, open mouth, curve of crescent
Trochlear notch
Beak-like projection at the base of the ulna’s trochlear notch, bottom lip of curve. Slips into coronoid fossa of humerus when flexing elbow
Coronoid process
Smooth articular surface of the ulna for the radius. Lateral
Radial notch
Distal, lateral round articulation point of ulna for distal radius
Radial articulation
Sharp lateral end of ulnar shaft, supports the interosseous membrane which stretches between ulna and radius
Interosseous crest
Sharp projection on medial, distal end of ulna. Sharp pointy part of bone
Styloid process
Lateral lower arm bone
Radius
Rounded proximal end of radius, articulates superiorly with capitulum and medially with radial notch
Radial head
Slender area between radius’s head and radial tuberosity
Neck
Blunt, rugged attachment on radius for biceps muscle. Located anteriorly and medially
Radial tuberosity
Sharp, medial edge of radial shaft. Attachment point for the interosseous membrane, medial, extremely sharp
Interosseous crest
Concave, articular surface on medial, distal end of radius. Articulates with the convex part of ulna
Ulnar notch
Projection on posterior, distal surface of radius
Dorsal tubercle
Distal, inferior point of articulation on radius for two bones of the wrist (scaphoid and lunate)
Distal radial articular surface
Distal, lateral sharp projection of radius
Styloid process
