Forearm

Question 1

Pronator teres

Answer 1

Attachments: 
- superior medial epicondyle (numeral head)
- coronoid process (ulnar head) 
- middle part of lateral surface of radius 
Actions:
- pronation of forearm
- weak flexion of forearm
Innervation:
- median nerve C6 & C7

Question 2

Flexor carpi radialis

Answer 2

Attachments: 
- medial epicondyle of humerus 
- base of 2nd metacarpal 
Actions:
- flexes hand at wrist 
- abducts hand at wrist 
Innervation:
- median nerve C6 & C7

Question 3

Palmaris longus

Answer 3

Attachments:
- medial epicondyle of humerus 
- flexor retinaculum and palmar aponeurosis 
Actions:
- flexes hand at wrist (weakly)
- tenses palmar aponeurosis 
- absent uni/bilaterally in 14% of people
Innervation:
- median nerve C7 & C8

Question 4

Flexor carpi ulnaris

Answer 4

Attachments: 
- humeral head: medial epicondyle 
- ulnar head: olecranon and posterior border
- pisiform, hamate, 5th metacarpal 
Actions:
- flexes hand at wrist
- adducts hand at wrist
Innervation:
- ulnar nerve C7 & C8

Question 5

Flexor digitorum superficialis

Answer 5

Attachments:
- humeroulnar head: medial epicondyle of humerus, coronoid process
- radial head: superior half of anterior border of radius
- shafts of middle phalanges 2-5
Actions: 
- flexes middle and proximal phalanges
Innervation:
- median nerve C7, C8, T1

Question 6

Flexor digitorum profundus

Answer 6

Attachments: 
- proximal 3/4 of anterior and medial aspect of ulnar, interosseous membrane 
- bases of distal phalanges of digits 2-5
Actions: 
- flexes distal phalanges of digits 2-5
Innervation:
- medial 1/2: ulnar nerve C8, T1
- lateral 1/2: median nerve C8, T1

Question 7

Flexor pollicis longus

Answer 7

Attachments: 
- anterior surface of radius and interosseous membrane
- base of 1st distal phalanx 
Actions:
- flexion of phalanges of digit 1
Innervation: 
- median nerve C8, T1

Question 8

Pronator quadratus

Answer 8

Attachments:
- distal 1/4 of anterior surface of ulnar
- distal 1/4 of anterior surface of radius
Actions:
- pronation of forearm
Innervation:
- median nerve C8, T1

Question 9

Brachioradialis

Answer 9

Attachments:
- proximal 2/3 of lateral supracondylar ridge
- lateral, distal radius, proximal to styloid process
Actions:
- flexion of forearm at elbow
Innervation:
- radial nerve C5, C6, C7

Question 10

Extensor digitorum

Answer 10

Attachments:
- lateral epicondyle of humerus 
- extensor expansion of digits 
Actions:
- extension of digits 2-5
Innervation:
- deep branch of radial nerve C7, C8

Question 11

Extensor carpi radialis longus

Answer 11

Attachments:
- lateral supracondylar ridge
- base of 2nd metacarpal
Actions:
- extension of hand at wrist
- abduction of hand at wrist 
Innervation:
- radial nerve C6, C7

Question 12

Extensor carpi radialis brevis

Answer 12

Attachments: 
- lateral epicondyle of humerus
- base of 3rd metacarpal
Actions:
- extension of hand at wrist
- abduction of hand at wrist
Innervation:
- deep branch of radial nerve C7, C8

Question 13

Extensor digiti minimi

Answer 13

Attachments:
- lateral epicondyle of humerus
- extensor expansion of digit 5
Actions: 
- extends digit 5
Innervation:
- deep branch of radial nerve C7, C8

Question 14

Extensor carpi ulnaris

Answer 14

Attachments:
- lateral epicondyle of humerus and posterior border of ulnar
- base of 5th metacarpal 
Actions:
- extends hand at wrist 
- adducts hand at wrist
Innervation:
- deep branch of radial nerve C7, C8

Question 15

Anconeus

Answer 15

Attachments:
- lateral epicondyle of humerus
- lateral surface of olecranon and superior, posterior surface of ulnar
Actions:
- assists in extension of the forearm at the elbow
Innervation:
- radial nerve C7, C8, T1

Question 16

Supinator

Answer 16

Attachments:
- lateral epicondyle of humerus, radial collateral ligament, annular ligament, supinator fossa, crest of ulnar
- lateral anterior and posterior surfaces of proximal 1/3 of radius
Actions:
- supination of forearm
Innervation:
- Deep branch of radial nerve C7, C8

Question 17

Abductor pollicis longus

Answer 17

Attachments:
- posterior surfaces of radius, ulnar and interosseous membrane
- base of 1st metacarpal
Actions:
- abducts 1st digit at carpometacapal joint
- extends 1st digit at carpometacarpal joint
Innervation:
- posterior interosseous nerve C7, C8

Question 18

Extensor pollicis brevis

Answer 18

Attachments: 
- posterior surface of radius and interosseous membrane 
- base of 1st proximal phalanx 
Actions:
- extension of 1st proximal phalanx
Innervation:
- posterior interosseous nerve C7, C8

Question 19

Extensor pollicis longus

Answer 19

Attachments:
- posterior surface of ulna and interosseous membrane 
- base of 1st distal phalanx 
Actions:
- extends distal phalanx of 1st digit
- extends 1st proximal phalanx and 1st metacarpal 
Innervation:
- posterior interosseous nerve C7, C8

Question 20

Extensor indicis

Answer 20

Attachments:
- posterior surface of ulna and interosseous membrane 
- extensor expansion of 2nd digit 
Actions:
- extends 2nd digit 
- assists expansion of hand at wrist
Innervation:
- posterior interosseous nerve C7, C8