Week 2 muscles Flashcards
Brachialis
O: Distal ½ of anterior surface of humerus
I: Tuberosity and coronoid process of the ulna
Inner: Musculocutaneous nerve, Radial nerve
Action: Flexion of elbow (in all positions)
Brachioradialis
O: Lateral suprachondylar ridge of the humerus
I: Lateral side of distal end of radius
Inner: Radial nerve
A: Flexion of elbow (when the forearm is in neutral supination/pronation position)
Pronator Teres
O: coronoid process of ulna, medial epicondyle of humerus
I: Middle part of lateral radius
Inner: Median nerve
A: Pronation of forearm
Pronator Quadratus
O: Distal quarter of anterior surface of ulna
I: Distal quarter of anterior surface of radius
Inner: Median nerve
A: Pronation of forearm
Supinator
O: lateral epicondyle of humerus, spinator crest of ulna
I: Lateral, posterior and anterior surfaces of proximal radius
Inner: Radial nerve
A: Supination of forearm
Flexor Carpi Radialis
O: Medial epicondyle of the humerus
I: Base of 2nd metacarpal
Inner: Median nerve
A:
- Wrist flexion
- Wrist abduction
Palmaris Longus
O: Medial epicondyle of the humerus
I: -palmar aponeurosis
-flexor retinaculum
Inner: Median nerve
A: Wrist flexion
Flexor Digitorum Superficialis
O:
- medial epicondyle of the humerus
- medial side of coronoid process of the ulna
- anterior radius
I: Sides of middle phalanges of digits 2-5
Inner: Median nerve
A: Wrist flexion,
MCP and PIP flexion 2-5
Flexor Carpi Ulnaris
O:
- medial epicondyle
- posterior border of ulna
- olecranon
I:
- pisiform
- base of metacarpal 5
- hook of hamate
Inner: Ulnar nerve
A: Wrist flexion, Wrist adduction
Flexor Pollicis Longus
O: -anterior surface of radius
I: Base of distal phalange of digit 1, palmar surface
Inner: Median nerve
A: MCP and IP flexion of digit 1
Flexor Digitorum Profundus
O: Anterior and medial surface of proximal ulna
I: Base of distal phalanges of digits 2-5, anterior surface
Inner:
Median nerve (lateral part of muscle to digits 2 & 3)
Ulnar nerve (medial part of muscle to digits 4 & 5)
A: Wrist flexion, DIP flexion of digits 2-5
Extensor Carpi Radialis Longus
O: Lateral supracondylar ridge of humerus
I: Base of metacarpal 2, dorsal surface
Inner: Radial nerve
A: Wrist extension, Wrist abduction
Extensor Carpi Radialis Brevis
O: Lateral epicondyle of humerus
I: Base of metacarpal 3, dorsal surface
Inner: Radial nerve
A: Wrist extension, Wrist abduction
Extensor Digitorum
O: Lateral epicondyle of humerus
I: Base of middle and distal phalanges of digits 2-5 via extensor expansion, dorsal surface.
Inner: Radial nerve
A: Wrist extension.
-MCP, PIP, DIP extension of digits 2-5
Extensor Carpi Ulnaris
O: Lateral epicondyle of humerus
I: Base of metacarpal 5, dorsal surface
Inner: Radial nerve
A: Wrist extension, Wrist adduction
Extensor Digiti Minimi
O: Lateral epicondyle of humerus
I: Base of middle and distal phalange of digit 5 via the extensor expansion and extensor digitorum tendon
Inner: Radial nerve
A: MCP, PIP, DIP extension of digit 5
Abductor Pollicis Longus
O: Posterior surface of radius and ulna
I: Base of metacarpal 1
Inn: Radial nerve
A: Abduction and extension of digit 1 at CMC joints
Extensor Pollicis Brevis
O: Posterior surface of radius
I: Base of proximal phalange of digit 1, dorsal surface
Inner: Radial nerve
A: Extension of digit 1 at CMC and MCP joints
Extensor Pollicis Longus
O: Posterior surface of ulna
I: Base of distal phalange of digit 1
Inner: Radial nerve
A: Extension of digit 1 at CMC, MCP and IP joints
Extensor Indicis
O: Posterior and distal surface of ulna
I: Base of middle and distal phalange of digit 2 via the extensor expansion and extensor digitorum tendon
Inner: Radial nerve
A: Extension of digit 2 at MCP, PIP and DIP joints
Subclavian artery
Axillary artery
Brachial artery
Ulnar artery
Radial artery
Musculocutaneous Nerve
