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HHP 3300 Lecture 4
Elbow and Radioulnar
| Question | Answer |
|---|---|
| Hinge Joint | Olecranon process of ulna fits into olecranon fossa of humerus. |
| Gliding Joint | Capitulum (or capitellum or capitulum) of humerus articulates with head olecranon fossa. |
| Humeroulnar joint | These two joints are considered one hinge joint. |
| Radius is on which side? | lateral (thumb) side of your forearm |
| Ulna is on which side? | medial (pinky) side |
| Where does the hyperextension of the elbow come from? | Small olecranon process or large olecranon fossa. |
| Proximal radioulnar joint | Radial notch of the ulna= pivot joint |
| Distal radioulnar joint | Ulnar notchof radius= pivot joint |
| Elbow Ligaments | Radial collateral (lateral), Ulnar collateral (medial). Provides stabilization of the elbow |
| Annular ligament | Provides a sling for head to give the joint more stability. |
| Elbow movements | Flexion & Extension |
| Forearm movements | Supination & Pronation |
| Biceps Brachii Orgin Long Head | Supraglenoid tubercle above the superior lip of glenoid fossa |
| Biceps Brachii Orgin Short Head | Coracoid process of scapula |
| Biceps Brachii Insertion | Radial tuberosity |
| Biceps Brachii Action | Flexion of elbow; supination of forearm |
| Concentric contraction | A muscle shortens while producing force |
| Brachialis Orgin | Distal half of anterior surface of humerus |
| Brachilalis Insertion | Anterior surface of coronoid process of ulna |
| Brachilalis Action | Flexion of elbow |
| Anconeus Orgin | Posterior of lateral condyle of humerus. |
| Anconeus Insetion | Posterior surface of lateral aspects of olecranon process and proximal 1/4 of ulna. |
| Anconeus Action | Extension of elbow |
| Pronator Quadratus Orgin | Distal fourth of palmer surface of ulna |
| Pronator Quadratus Insertion | Distal fourth of palmar surface of radius |
| Pronator Quadratus Action | Pronation of forearm |
| Elbow Flexion | Bicep brachii, Brachialis, & Brachioradialis |
| Pronation | Brachioradialis |
| Supination | Bicep brachii & Brachioradialis |
| Brachioradialis Orgin | Supracondylar ridge of lateral epicondyle of humerus |
| Brachioradialis Insertion | Styloid process of radius |
| Brachioradialis Action | Flexion of elbow; pronation/ supination |
| The brachialis originates on the distal half of the _____ surface of the humerus. | Anterior Surface |
| The brachilalis inserts on the anterior surface of _____ process of ulna. | Coronoid Process |
| The brachioradialis inserts on the ____ process of the radius. | Styloid Process |
| The brachioradialis originates at the _____ ridge of lateral epicondyle. | lateral supracondylar |
| The bicep brachia inserts on the ____ tuberosity. | Radial Tuberosity |
| Originates on the distal half of the anterior surface of the humerus | Brachialis |
| Inserts on anterior surface of coronoid process of ulna | Brachialis |
| Inserts on the styloid process of the radius. | Brachioradialis |
| Originates at the supracondylar ridge of lateral epicondyle | Brachioradialis |
| Inserts on the radial tuberosity | Biceps brachii |
| Originates on the distal ¼ of the anterior side of the ulna | Pronator quadratus |
| Inserts on the middle 1/3 of the lateral surface of the radius | Pronator teres |
| Inserts on the distal ¼ of the anterior side of the radius | Pronator quadratus |
| Originates at the distal part of the medial condyloid ridge of the humerus and the medial side of the proximal ulna | Pronator teres |
| The pronator quadratus originates on the distal ¼ of the anterior side of the _____ | Ulna |
| The pronator teres inserts on the middle 1/3 of the lateral surface of the _____ | Radius |
| The pronator quadratus inserts on the distal ¼ of the anterior side of the _____ | Radius |
| The pronator teres originates at the distal part of the medial condyloid ridge of the humerus and the _____ side of the proximal ulna | Medial |
| Originates on the distal half of the anterior surface of the humerus | Brachialis |
| Inserts on anterior surface of coronoid process of ulna | Brachialis |
| Inserts on the styloid process of the radius. | Brachioradialis |
| Originates at the supracondylar ridge of lateral epicondyle | Brachioradialis |
| Inserts on the radial tuberosity | Biceps brachii |
| Originates on the distal ¼ of the anterior side of the ulna | Pronator quadratus |
| Inserts on the middle 1/3 of the lateral surface of the radius | Pronator teres |
| Inserts on the distal ¼ of the anterior side of the radius | Pronator quadratus |
| Originates at the distal part of the medial condyloid ridge of the humerus and the medial side of the proximal ulna | Pronator teres |
| The triceps brachii (long head) originates on the ________ tubercle below the inferior lip of the glenoid fossa of the scapula. | Infraglenoid |
| The triceps brachii inserts on the ______ process of the ulna. | Olecranon |
| The anconeus originates on the posterior of the lateral condyle of the _______. | Humerus |
| The supinator originates on the lateral epicondyle of the humerus and adjacent portion of the _______. | Ulna |
| Originates on the lateral epicondyle of the humerus and adjacent portion of the ulna. | Supinator |
| Inserts on the posterior surface of the lateral aspects of the olecranon process and proximal ¼ of ulna. | Anconeus |
| Originates on the posterior of lateral condyle of the humerus. | Anconeus |
| Inserts on the lateral surface of the proximal radius just below the head. | Supinator |
| Inserts on the olecranon process. | Triceps brachii |
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