1What is the origin of brachioradialis?
lateral supracondylar ridge of the humerus and lateral intermuscular septum
2What is the insertion of brachioradialis?
styloid process of the radius
3What is the action of brachioradialis?
elbow flexion and rotates forearm to the mid-prone position
4What is the innervation of brachioradialis?
radial nerve (C5-8)
5What is the origin of extensor carpi radialis longus (ECRL)?
lateral supracondylar ridge of the humerus (distal to brachioradialis)
6What is the insertion of extensor carpi radialis longus (ECRL)?
2nd metacarpal (dorsal surface of base)
7What is the action of extensor carpi radialis longus (ECRL)?
extension and radial deviation (abduction) at the radiocarpal/midcarpal joints
8What is the innervation of extensor carpi radialis longus (ECRL)?
radial nerve (C5-8)
9What is the origin of extensor carpi radialis brevis (ECRB)?
lateral epicondyle (common extensor origin, CEO)
10What is the insertion of extensor carpi radialis brevis (ECRB)?
3rd metacarpal (dorsal surface of base)
11What is the action of extensor carpi radialis brevis (ECRB)?
extension and radial deviation at the radiocarpal/midcarpal joints
12What is the innervation of extensor carpi radialis brevis (ECRB)?
radial nerve-deep branch (C6-8)
13What is the origin of extensor digitorum (ED)?
lateral epicondyle (common extensor origin, CEO)
14What is the insertion of extensor digitorum (ED)?
middle and distal phalanges of the digits 2-5
15What is the action of extensor digitorum (ED)?
extension at MCP and IP joints of digits 2-5 and assists wrist extension
16What is the innervation of extensor digitorum (ED)?
radial nerve -posterior interosseous nerve (PIN) (C6-8)
17What is the origin of extensor digiti minimi (EDM)?
lateral epicondyle (common extensor origin, CEO)
18What is the insertion of extensor digiti minimi (EDM)?
blends with tendon of extensor digitorum on 5th digit
19What is the action of extensor digiti minimi (EDM)?
extension at MCP and IP joints of digit 5 and assists wrist extension
20What is the innervation of extensor digiti minimi (EDM)?
radial nerve -posterior interosseous nerve (PIN) (C6-8)
21What is the origin of extensor carpi ulnaris (ECU)?
lateral epicondyle (common extensor origin, CEO) and posterior border of the ulna
22What is the insertion of extensor carpi ulnaris (ECU)?
base of 5th metacarpal (ulnar surface)
23What is the action of extensor carpi ulnaris (ECU)?
extension and ulnar deviation (adduction) of the wrist and assists wrist extension
24What is the innervation of extensor carpi ulnaris (ECU)?
radial nerve-posterior interosseous nerve (C6-8)
25What is the origin of the supinator?
superficial head: lateral epicondyle of humerus; deep head: supinator crest of the ulna
26What is the insertion of the supinator?
antero-lateral surface of the radius (superior 1/3 of the radius)
27What is the action of the supinator?
supination of the forearm and may assist in elbow flexion
28What is the innervation of the supinator?
radial nerve-deep branch (C6-8)
29What is the origin of abductor pollicis longus (AbPL)?
posterior surface of middle of radius and ulna and interosseous membrane
30What is the insertion of abductor pollicis longus (AbPL)?
base of 1st metacarpal (lateraladial side)
31What is the action of abductor pollicis longus (AbPL)?
abducts and extends 1st digit at carpometacarpal (CMC) joint and may assist in radial deviation at radiocarpal joint
32What is the innervation of abductor pollicis longus (AbPL)?
radial nerve-posterior interosseous nerve (C6-8)
33What is the origin of extensor pollicis brevis (EPB)?
posterior surface of the middle of the radius and interosseous membrane (distal to AbPL)
34What is the insertion of extensor pollicis brevis (EPB)?
base of proximal phalanx of 1st digit (lateraladial side)
35What is the action of extensor pollicis brevis (EPB)?
extends 1st digit at MCP joint
36What is the innervation of extensor pollicis brevis (EPB)?
radial nerve -posterior interosseous nerve (C6-8)
37What is the origin of extensor pollicis longus (EPL)?
middle 1/3 of the posterior surface of the ulna and interosseous membrane (distal to AbPL)
38What is the insertion of extensor pollicis longus (EPL)?
base of distal phalanx of the 1st digit (lateraladial side)
39What is the action of extensor pollicis longus (EPL)?
extends 1st digit at IP joint and assists extension at the MCP joint of 1st digit
40What is the innervation of extensor pollicis longus (EPL)?
radial nerve -posterior interosseous nerve (C6-8)
41What is the origin of extensor indicis (EI)?
distal posterior surface of ulna and interosseous membrane
42What is the insertion of extensor indicis (EI)?
blends with tendon of extensor digitorum on 2nd digit
43What is the action of extensor indicis (EI)?
extends 2nd digit at the MCP and IP joints
44What is the innervation of extensor indicis (EI)?
radial nerve-posterior interosseous nerve (C6-8)
45What is the lateral border of the cubital fossa?
brachioradialis
46What is the medial border of the cubital fossa?
pronator teres
47What is the superior border of the cubital fossa?
imaginary line between lateral and medial epicondyles
48What are the contents of the cubital fossa?
median nerve, brachial artery, radial artery, ulnar artery, and radial nerve
49What is the roof of the cubital fossa?
bicipital aponeurosis, skin, and superficial fascia
50What is the floor of the cubital fossa?
brachialis and supinator