Bones and bony landmarks in forearm: Radius and ulna Flashcards
Where is the radial head, and describe its shape?
2, it is a concave, disc-shaped articulating surface
Is the thickness of the radial head equal throughout the structure, and what joint does is the radial head a part of?
Radial head is thicker on medial side, as the medial side articulates with the radial notch of ulna to form the proximal radioulnar joint
Describe the shape, and location of the radial notch of ulna, and what joint is it a part of?
Narrow depression on lateral side of coronoid process that articulates with medial side of radial head to form proximal radioulnar joint
Where is the radial neck, and what 2 bony landmarks does it lie in between?
3, Radial neck is between radial head and radial/bicipital tuberosity
Where is the bicipital/radial tuberosity, and what muscle attaches to it?
1, biceps brachii muscle attaches onto radial/bicipital tuberosity
Where is the radial styloid process, and describe its location in the radius?
5, it is the projection on the lateral side of the distal region of the radius (thumb side of hand)
Where is the ulnar notch, and describe its shape and the joint that it is a part of?
Ulnar notch is on the medial side of the distal region of the radius
Concave surface
Articulates with ulnar head to form distal radioulnar joint
Where is the dorsal tubercle, and is it in the proximal or distal region of that bone?
8, dorsal tubercle is in the distal region of the radius
Where is the olecranon process, and what muscle attaches to its superior surface?
9, Olecranon process is a large, proximal projection of ulna and is the site of attachment of triceps brachii muscle
When the olecranon process is palpated, how is it described?
Tip of the elbow
Where is the coronoid process, and what structure does it form with the olecranon process?
6, Coronoid process is a projection on anterior surface of ulna
Coronoid process and olecranon process from trochlear notch
Where is the ulnar tuberosity, and what bony landmark is it immediately distal to?
7, ulnar tuberosity is immediately distal to coronoid process
What muscle attaches to the ulnar tuberosity?
Brachialis muscle
Where is the ulnar styloid process, and what region of the ulna is it located in?
4, ulnar styloid process is in the distal region of the ulna
What 2 bony surfaces articulate to form the distal radioulnar joint?
Ulnar notch of radius
Ulnar head
