Appendicular Muscles - Upper Extremity Flashcards
Name Origin, Insertion, and Action
Anterior Deltoid
O: Lateral 1/3 of Clavicle I: Deltoid Tuberosity (Humerus) A: Shoulder Abduction, Flexion, Medial Rotation, Horizontal Adduction
Middle Detoid
O: Acromion Process (Scapula) I: Deltoid Tuberosity (Humerus) A: Shoulder Abduction
Posterior Deltoid
O: Spine of Scapula I: Deltoid Tuberosity (Humerus) A: Shoulder Abduction, Extension, Hyperextension, External Rotation, Horizontal abduction
Brachialis
O: Distal half of Humerus, anterior surface I: Coronoid Process (Ulna) and Ulnar Tuberosity A: Elbow Flexion
Brachioradialis
O: Lateral Supracondylar ridge (Humerus) I: Styloid Process of Radius A: Elbow Flexion
Biceps brachii
Long Head O: Supraglenoid Tubercle (Scapula) Short Head O: Coracoid Process (Scapula) I: Radial Tuberosity (Radius) A: Elbow Flexion, forearm Supination
Triceps brachii
Long Head O: Infraglenoid Tubercle (Scapula) Lateral Head O: Inferior to Greater Tubercle (Posterior Humerus) Medial Head O: Posterior surface (Humerus) I: Olecranon Process (Ulna) A: Elbox Extension
Supinator
O: Lateral Epicondyle (Humerus) and adjacent Ulna I: Anterior surface of proximal Radius A: forearm Supination
Pronator Teres
O: Medical Epicondyle (Humerus) & Coronoid Process of Ulna I: Lateral aspect of Radius at midpoint A: forearm Pronation, assist - Elbox Flexion
Pronator Quadrates
O: Distal 4th of Ulna I: Distal 4th of Radius A: forearm Pronation
Flexor Carpi Ulnaris
O: Medial Epicondyle (Humerus) I: Pisiform, base of 5th Metacarpal A: Wrist Flexion, Ulnar Deviation (
Flexor Carpi Radialis
O: Medial Epicondyle (Humerus) I: Base of 2nd & 3rd Metacarpals A: Wrist Flexion, Radial Deviation (
Palmaris Longus
O: Medial Epicondyle (Humerus) I: Palmar Fascia A: assist Wrist Flexion
Extensor Carpi Radialis Longus
O: Supracondylar ridge (Humerus) I: Base of 2nd metacarpal A: Wrist Extension, Radial Deviation
Extensor Carpi Radialis Brevis
O: Lateral Epicondyle (Humerus) I: Base of 3rd metacarpal A: Wrist Extension
Extensor Carpi Ulnaris
O: Lateral epicondyle (Humerus) I: Base of 5th metacarpal A: Wrist Extension, Ulnar Deviation
Lumbricales
O: Tendon of Flexor Digitorum Profundus I: Tendon of Extensor Digitorum A: Flex MCP joint while Extending DIP & PIP joints
Flexor Digitorum Superficialis
O: Common Flexor tendon, Coronoid Process (ulna), & Radius I: Side of Middle phalanx of fingers 2-5 A: Flexes MCP and PIP joints
Flexor Digitorum Profundus
O: Upper 3/4 of Ulna I: Distal phalanx of fingers 2-5 A: Flexes all 3 joints of fingers (MCP, PIP, DIP)
Extensor Digitorum
O: Lateral Epicondyle (Humerus) I: Base of distal phalanx of 2nd - 5th fingers A: Extends all 3 joints of fingers (MCP, PIP, DIP)
Extensor Digiti Minimi
O: Lateral Epicondyle (Humerus) I: Base of distal phalanx of 5th finger A: Extends all 3 joints (MCP, PIP, DIP) of 5th finger
Extensor Indicis
O: Distal Ulna I: Base of distal Phalanx of 2nd finger A: Extends all 3 joints of 2nd finger (MCP, PIP, DIP)
Flexor Pollicis Longus
O: Anterior surface of Radius I: Distal Phalanx of Thumb A: Flexes all joints of the thumb (CMC, MCP, IP)
Abductor Pollicis Longus
O: Posterior Radius, Interosseous membrane, middle Ulna I: Base of 1st metacarpal A: Abducts Thumb (CMC joint)
