Exam 4 Muscle Chart Flashcards
Anconeus
Action:
- Elbow extension
- Stabilization of ulna during pronation and supination
Origin:
- Posterior surface of the lateral epicondyle
Insertion:
- Lateral border of the olecranon process
Innervation:
- radial (C7, C8)
Biceps Brachii
Action:
- Elow Flexion
- Forearm supination
- Shoulder Flexion
Origin:
- Long Head: Supraglenoid tuberosity of scapula
- Short Head: Coranoid process of scapula
Insertion:
- radial tuberosity
Innervation:
- Musculocutaneous (C5, C6)
Brachialis
Action:
- Elbow flexion
Origin:
- Distal 1/2 of anterior humerus
Insertion:
- coronoid process of ulna
- ulnar tuberosity
Innervation:
- Musculocutaneous (C5,C6)
Brachioradialis
Action:
- Elbow flexion
- Forearm pronation
- May assist with forearm supination
Origin:
- lateral supracondylar ridge of humerus
Insertion:
- styloid process of radius
Innervation:
- Radial (C5, C6)
Extensor Capri Radialis Brevis
Action:
- Wrist extension
- Radial Deviation
Origin:
- Lateral epicondyle via the common extensor tendon
- radial collateral ligament
Insertion:
- base of the 3rd metacarpal
Innervation:
- Radial (C6, C7)
Extensor Carpi Radialis Longus
Action:
- Wrist extension
- Radial deviation
Origin:
- supracondylar ridge of humerus
Insertion:
- radial side of the 2nd metacarpal
Innervation:
- Radial (C6, C7)
Extensor Carpi Ulnaris
Action:
- Wrist extension
- Ulnar deviation
Origin:
- lateral epicondyle via the common extensor tendon
Insertion:
- ulnar side of the base of the 5th metacarpal
Innervation:
- Deep Radial (C6-C8)
Extensor Digitorum Communis
Action:
- Wrist extension
- MCP (metacarpophalangeal joint) extension
- PIP (proximal interphalangeal) extension
Origin:
- lateral epicondyle via the common extensor tendon
Insertion:
- into the dorsal surface of the base of the middle and distal phalanges of each of the 4 fingers
Innervation:
- Deep Radial (C6-C8)
Flexor Capri Radialis
Action:
- Forearm pronation
- Wrist flexion
- Radial deviation
- Elbow flexion
Origin:
- medial epicondyle via the common flexor tendon
Insertion:
- Palmar aspect of the bases of the 2nd and 3rd metacarpal bones
Innervation:
- Median (C6, C7)
Flexor Digitorum Profundus
Action:
- DIP (Distal Interphalangeal joint) flexion
- PIP (proximal interphalangeal) flexion
- Wrist flexion
Origin:
- Anteromedial proximal 3/4 of the ulna and associated interosseous membrane
Insertion:
- Bases of the distal phalanges of the 2nd-5th digits
Innervation:
- Lateral: Median
- Medial: Ulnar
- (C8, T1)
Flexor Capri Ulnaris
Action:
- Wrist flexion
- Ulnar deviation
- Elbow flexion
Origin:
- Humoral Head: Medial epicondyle via the common flexor tendon
- Ulnar Head: Medial border of the olecranon; proximal 2/3 of the posterior ulna
Insertion:
- Pisiform
- Hamate
- Palmar aspect of the base of the 5th metacarpal
Innervation:
- Ulnar (C8, T1)
Flexor Digitorum Superficialis
Action:
- PIP (proximal interphalangeal) flexion
- MCP (metacarpophalangeal joint) flexion
Wrist flexion
Origin:
- Humoral Head: Medial epicondyle via the common flexor tendon; ulnar collateral ligament
- Ulnar Head: Coronoid process
- Radial Head: Oblique line of radius
Insertion:
- Middle phalanges of the 2nd-5th digits
Innervation:
- Median (C7-T1)
Palmaris Longus
Action:
- Wrist flexion
Origin:
- Medial epicondyle via the common flexor tendon
Insertion:
- Flexor retinaculum
- Palmar aponeurosis
Innervation:
- Median (C6, C7)
Pronator Quadratus
Action:
- Forearm pronation
Origin:
- Anterior surface of the distal 1/4 of the ulna
Insertion:
- Lateral portion of the distal 1/4 of the radius
Innervation:
- Anterior interosseous (C8, T1)
Pronator Teres
Action:
- Forearm pronation
- Elbow flexion
Origin:
- Humoral Head: Proximal to the medial epicondyle of the humerus
- Ulnar Head: Coronoid process
Insertion:
- Medial 1/3 of the lateral radius
Innervation:
- Median (C6, C7)
Supinator
Action:
- Forearm supination
Origin:
- Lateral epicondyle
- Radial collateral ligament
- Annular ligament
- Supinator crest of ulna
Insertion:
- Proximal 1/3 of the radius
Innervation:
- Deep radial (C6-C8)
Triceps Brachii
Action:
- Elbow extension
- Shoulder extension
Origin:
- Long Head: Infraglenoid tuberosity of scapula
- Lateral Head: Lateral and posterior surface of the proximal 1/2 of humerus
- Medial Head: Distal 2/3 of medial and posterior humerus
Insertion:
- Olecranon process of ulna
Innervation:
- Radial (C7-C8)
