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Elbow: Anatomy. Bony Anatomy Radius Ulna Humerus – 2 condyles ◦ Lateral – capitulum  Articulates with the radius ◦ Medial – trochlea  Articulates with.

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Presentation on theme: "Elbow: Anatomy. Bony Anatomy Radius Ulna Humerus – 2 condyles ◦ Lateral – capitulum  Articulates with the radius ◦ Medial – trochlea  Articulates with."— Presentation transcript:

1 Elbow: Anatomy

2 Bony Anatomy Radius Ulna Humerus – 2 condyles ◦ Lateral – capitulum  Articulates with the radius ◦ Medial – trochlea  Articulates with humerous

3 Ligaments ◦ Ulnar collateral  Medial epicondyle to ulnar trochlear notch  Strong anterior band, weaker transverse & middle  Gives medial support ◦ Radial collateral  Lateral epicondyle to side of annular ligament  Does not attach to radius  Gives lateral support ◦ Annular  Holds radius to ulna and humerus  Allows rotation of radius (supination and flexion)  Gives lateral support

4 Muscles Flexion ◦ Biceps brachii, brachial, brachioradialis Extension ◦ Triceps brachii Pronation ◦ Pronator quadratus, pronator teres Supination ◦ Biceps brachii, supinator muscle

5 Muscles Biceps brachii ◦ Insertion  Tuberosity of the radius ◦ Movement  Flexes elbow, supinates forearm Brachialis ◦ Insertion  Coronoid process of ulna ◦ Movement  Flexes elbow Brachioradialis ◦ Insertion  Styloid process of the raidus ◦ Movement  Flexes elbow Triceps brachii ◦ Insertion  Olecranon process of ulna ◦ Movement  Extension

6 Muscles Supinator ◦ Insertion  Proximal end of the lateral surface of the shaft of the radius ◦ Movement  Supinates the elbow Pronator teres ◦ Insertion  Middle of the lateral surface of the shaft of the radius ◦ Movement  Pronates elbow Anconeus ◦ Insertion  Lateral surface of the olecranon process of the ulna ◦ Movement  Extends elbow

7 Joints Humeroradial ◦ Articulation of lateral distal humerus and proximal radius Radioulnar ◦ Articulation between radial notich of the proximal lateral aspect of ulna, the radial head and capitulum of distal humerus  Important in supination andpronation Humeroulnar ◦ Articulation between distal humerus medially and proximal ulna

8 Nerves ◦ Median  Passes deep in the cubital fossa medial to the biceps and brachialis ◦ Radial  Lateral to biceps and brachialis ◦ Ulnar  Courses posteriorly in groove between the medial epicondyle and olecranon process ◦ Musclocutaneous  Passes through cubital fossa, supplies the anterior forearm and thenar muscles

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13 Elbow Anatomy MISC ◦ Medial & lat. Condyles with the olecranon process form a straight line when arm is straight  Forms a triangle when arm is bent ◦ Posterolateral triangle – radial head, lat. Condyle, olecronon process  Good place for aspiration

14 Elbow Anatomy Carrying angle ◦ 5-15 degrees female 5-10 degrees male  This angle will increase in athletes that have participated in throwing sports for a long time, or the angle could increase if there is a fx ROM ◦ Flexion – 145 degrees ◦ Extension – 0 / -5 degrees ◦ Pronation & supination – 90 degrees

15 Flexion and Extension Pronation and Supination


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