OIAN 14

Question 1

Pronator teres

Answer 1

Origin:
- Humeral head: upper portion of medial epicondyle via the CFT (common flexor tendon)
- Ulnar head: coronoid process of ulna
Insertion:
- Pronator tuberosity of radius
Action:
- Pronates forearm 
- Weakly flexes the elbow
Nerve:
- Median
- C 6,7

Question 2

Flexor carpi radialis

Answer 2

Origin:
- Medial epicondyle via the CFT
Insertion:
- Base of 2nd and sometimes 3rd metacarpals on the palmar side of the hand
Action:
- Flexes the wrist 
- Radially deviates the wrist
- May assist to pronate the forearm
Nerve:
- Median
- C 6,7

Question 3

Palmaris longus

Answer 3

Origin:
- Medial epicondyle via the CFT
Insertion:
- Superficial portion of the palmar aponeurosis
Action:
- Assists to flex the wrist
Nerve:
- Median
- C 6,7

Question 4

Flexor carpi ulnaris

Answer 4

Origin:
- Humeral head: medial epicondyle via the CFT
- Ulnar head: upper portion of the posterior ulna
Insertion:
- Pisiform & hamate bones
- Base of the 5th metacarpal
Action:
- Flexes the wrist
- Ulnarly deviates the wrist
- Functionally stabilizes the wrist to permit powerful thumb motion
Nerve:
- Ulnar
- C8,T1

Question 5

Flexor digitorum superficialis

Answer 5

Origin:
- Humeral-ulnar head: medial epicondyle via the CFT
- Radial head: oblique line of radius
Insertion:
- Splits to both sides of the base of each middle phalanx of the 4 fingers
Action:
- Flexes the proximal and middle IP joints
- Flexes the wrist if fingers are extended
Nerve:
- Median
- C7,8, T1

Question 6

Flexor digitorum profundus

Answer 6

Origin:
- Anterior & medial surface of proximal ¾ ulna
Insertion:
- Distal phalanx of medial 4 digits (through the FDS tunnel)
Action:
- Flexes the distal IP joints and in so doing flexes the proximal and middle IP joints
- Aids to flex the wrist (even more if fingers are extended)
Nerve:
- Medial portion: ulnar
- C8, T1
- Lateral portion:
median
- C8, T1