Forearm

Question 1

Pronator Teres

Answer 1

O:
Medial epicondyle of humerus
Coronoid process of ulna

I:
Middle of lateral surface of radius

A:
Pronates forearm
Flexes forearm

N: 
Median n (C6, C7)

Question 2

Flexor Carpi Radialis

Answer 2

O:
Medial epicondyle of humerus

I:
Base of the 2nd metacarpal

A:
Flexes hand and abducts it

N: 
Median n (C6, C7)

Question 3

Palmaris Longus

Answer 3

O:
Medial epicondyle of humerus

I:
Distal 1/2 of flexor retinaculum
Palmar aponeurosis

A:
Flexes hand
Tightens palmar aponeurosis

N:
Median n (C7, C8)

Question 4

Flexor Carpi Ulnaris

Answer 4

O:
Humeral head–> Medial epicondyle of humerus
Ulnar head–> Olecranon and posterior border

I:
Pisiform
Hook of hamate
5th metacarpal

A:
Flexes hand
Adducts it

N: 
Ulnar n (C7, C8)

Question 5

Flexor Digitorum Superficialis

Answer 5

O:
Humeroulnar head–> medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulnar
Radial head–> superior 1/2 of anterior border of radius

I:
Bodies of middle phalanges of medial 4 digits

A:
Flexes middle phalanges of medial 4 digits
Stronger action flexes proximal phalanges and hand

N: 
Median n (C7, C8, T1)

Question 6

Flexor Digitorum Profundus

Answer 6

O:
Proximal 3/4 of medial and anterior surfaces of ulna and interosseus membrane

I:
Bases of distal phalanges of medial 4 digits

A:
Flexes distal phalanges of medial 4 digits

N:
Medial part–> ulnar n (C8, T1)
Lateral part–> median n (C8, T1)

Question 7

Flexor Pollicis Longus

Answer 7

O:
Anterior surface of radius
Adjacent interosseous membrane

I:
Base of distal phalanx of thumb

A:
Flexes phalanges of 1st digit

N:
Anterior interosseous nerve (C8, T1)

Question 8

Pronator Quadratus

Answer 8

O:
Distal 1/4 of anterior surface of ulna

I:
Distal 1/4 of anterior surface of radius

A:
Pronates forearm prime mover
Deep fibers bind radius and ulna together assisting interosseous membrane

N:
Anterior interosseous n (C8,T1)

Question 9

Brachioradialis

Answer 9

O:
Proximal 2/3 of lateral supraepicondylar ridge of humerus

I:
Lateral surface of distal end of radius, proximal to styloid process

A:
Flexes forearm

N: 
Radial n (C5,6,7)

Question 10

Extensor Carpi Radialis Longus

Answer 10

O:
Lateral supracondylar ridge of humerus

I:
Base of 2nd metacarpal bone

A:
Extend and abduct hand at wrist

N: 
Radial n (C6, C7)

Question 11

Extensor Carpi Radialis Brevis

Answer 11

O:
Lateral eipcondyle of humerus

I:
Base of 3rd metacarpal bone

A:
Extend and abduct hand at wrist joint

N:
Deep branch of radial n (C7, C8)

Question 12

Extensor Digitorum

Answer 12

O:
Lateral epicondyle of humerus

I:
Extensor expansion of medial 4 digits

A:
Extends medial 4 digits at MCP, PIP, DIP
Extends hand at wrist

N:
Posterior interosseous n (C7,C8)

Question 13

Extensor Digiti Minimi

Answer 13

O:
Lateral epicondyle of humerus

I:
Extensor expansion of 5th digit

A:
Extends digit 5 at MCP, PIP and DIP

N:
Posterior interosseous n (C7, C8)

Question 14

Extensor Carpi Ulnaris

Answer 14

O:
Lateral epicondyle and posterior border of ulna

I:
Base of 5th metacarpal

A:
Extends wrist and ulnar deviation

N:
Posterior interosseous n (C7, C8)

Question 15

Anconeus

Answer 15

O:
Lateral epicondyle of humerus

I:
Lateral surface of olecranon
Superior part of posterior surface of ulna

A:
Assists triceps in extending elbow
Stabilizes elbow
Abducts ulna during pronation

N: 
Radial n (C7, C8, T1)

Question 16

Supinator

Answer 16

O: 
Lateral epicondyle of humerus 
Radial collateral and annular ligaments 
Supinator fossa 
Crest of ulna 

I:
Lateral, posterior and anterior surfaces of proximal 1/3 of radius

A:
Supinates forearm

N:
Deep branch of radial n (C7, C8)

Question 17

Abductor Pollicis Longus

Answer 17

O:
Posterior surfaces of ulna and radius
Interosseous membrane

I:
Base of 1st metacarpal

A:
Abducts thumb and extends it at CMC joint

N:
Posterior interosseous n (C7, C8)

Question 18

Extensor Pollicis Brevis

Answer 18

O:
Posterior surface of radius and interosseous membrane

I:
Base of proximal phalanx of thumb via extensor expansion

A:
Extends thumb–> proximal phalanx at MCP joint

N: 
Posterior interosseous (C7, C8)

Question 19

Extensor Pollicis Longus

Answer 19

O:
Posterior surface and middle of ulna
Interosseous membrane

I:
Base of distal phalanx of thumb via extensor expansion

A:
Extends distal phalanx of thumb at IP joint and MCP joint

N:
Posterior Interosseous n C7, C8

Question 20

Extensor Indicies

Answer 20

O:
Posterior surface of ulna
Interosseous membrane

I:
Extensor expansion of 2nd digit

A:
Extends index finger independently
Assists in wrist extension

N:
Posterior interosseous n (C7, C8)