Muscles: Upper Limb Flashcards
Extensor Capri Radialis Longus:
-Action
Wrist extension and abduction
Extensor Carpi Radialis Brevis:
-Origin, Insertion & Action
Origin: Lateral epicondyle of the humerus
Insertion: Dorsum of the third metacarpal bone
Action: Wrist extension and adduction
Extensor Carpi Ulnaris:
-Origin, Insertion and Action
Origin: Lateral epicondyle of the humerus
Insertion: Medial side of the base of the 5th metacarpal
Action: Wrist extension and adduction
Extensor Digitorum:
-Origin, Insertion and Action
Origin: Lateral epicondyle of the humerus
Insertion: Extensor expansion of digits 2-5
Action: Extension of the digits
Extensor Digiti Minimi:
-Origin, Insertion and Action
Origin: Lateral epicondyle of the humerus
Insertion: Joins the extensor digitorum tendon to the 5th digit and inserts into the extensor expansion
Action: Extension of digit 5
Extensor Retinaculum:
-Action
Wrist extension and restrains tendons
Extensor Pollicis Longus
-Action
Extension of the digits of the hand
Extensor Pollicis Brevis
-Action
Extension of the digits of the hand
Extensor Indicis
-Action
Extension of the digits of the hand
Adductor Pollicis Longus
-Action
Adduction of digit 1 (Thumb)
Flexor Carpi Radialis
-Action
Flexes and abducts the wrist
Flexor Carpi Ulnaris
Flexes and abducts the wrist
Palmaris Longus
Weak wrist flexor
Flexor Digitorum Superficialis:
-Origin, Insertion and Action
Origin:
Humeroulnar Head: Common flexor tendon
Radial Head: Middle 1/3 of the radius
Insertion: Bases of the distal phalanges of digits 2-5
Action: Flexes wrist, MCP and PIP joints
Flexor Digitorum Profundus:
-Insertion, Origin and Action
Origin: Posterior border of the ulna, proximal 2/3’s of the medial border of the ulna and the interosseous border
Insertion: Bases of the distal phalanges of digits 2-5
Action: Flexes distal DIP and MCP joints, and the wrist
Flexor Pollicis Longus:
-Action
Flexes the digits of the hand
Flexor Retinaculum:
-Action
Restrains tendons
Pronator Quadratus:
-Action
Pronation of the arm
Pronator Teres:
-Action
Pronation of the arm
Supinator:
-Action
Supination of the arm
Biceps Brachii
-Origin, Insertion and Action
Origin:
Short Head: Tip of the caracoled process of the scapula
Long Head: Supraglenoid tubercle of the scapula
Insertion: Radial tuberosity
Action:
- Elbow and shoulder flexion
- Shoulder supination*
Triceps Brachii:
-Origin, Insertion and Action
Origin:
Long Head: Infraglenoid tubercle of the scapula
Lateral Head: Posterolateral humerus and lateral inter-muscular septum
Medial Head: Posteromedial surface of the inferior 1/2 of the humerus
Insertion: Olecranon Process
Action: Elbow Extension
Brachioradialis:
-Origin, Insertion and Action
Origin: Upper 2/3’s of the lateral supracondylar ridge of the humerus
Insertion: Lateral side of the base of the styloid process of the radius
Action: Elbow Flexion
Coracobrachialis
-Origin, Insertion and Action
Origin: Coracoid process of the scapula
Insertion: Medial side of the humerus at the mid-shaft
Action: Adduction and flexion of the shoulder
Brachialis:
-Action
Elbow flexion
Anconeus:
Origin: Posterior sid elf the lateral epicondyle of the humerus
Insertion: Olecranon of the ulna
Action: Elbow extension
Deltoid:
-Origin, Insertion and Action:
Origin: Lateral 1/3 of the clavicle, acromion and the lower lip of the crest of the spine of the scapula
Insertion: Deltoid tuberosity
Action:
- Abduction
- Flexion
- Extension
- Medial and lateral rotation of the shoulder
