Ulna Flashcards
Olecranon (olecranon process)
most proximal part of the bone
Massive blunt process
Trochlear notch (semilunar notch)
articulates with the trochlear articular surface of the distal humerus
Coronoid process
anterior, beak shaped projection at the base of the semilunar notch
Vertical guiding ridge
separates the trochlear notch into medial and lateral portions
ulnar (brachial) tuberosity
immediately inferior to the coronoid process
Roughened depression
radial notch
small articular surface for the radius
shaft
long segment of bone between the brachial tuberosity and inflated distal end of the ulna
nutrient foramen
exits the bone in a distal direction and is found on the anteromedial ulnar shaft
interosseous crest
opposite the radius on the lateral surface of the ulnar shaft
pronator ridge
short, variably expressed ridge on the distal quarter of the shaft
located anteromedially
styloid proces
sharp, distal-most projection of the ulna
posteromedial concern of the bone
extensor carpi ulnas groove
adjacent to the styloid process, located proximolaterally to it
radial (circumferential) articulation
the distal, lateral, round articulation that conforms to the ulnar notch of the radius in the same way that the radial head conforms to the radial notch of the proximal ulna
Siding: Intact ulna
olecranon process is proximal and posterior, the radial notch is lateral and the interosseous crest is lateral
Siding: isolated proximal end
Ulnar (brachial) tuberosity is medially displaced
