[Muscles] Anterior forearm deep

Question 1

Flexor digitorum profundus

Answer 1

O: Medial anterior surface of ulna, interosseous membrane
Ins: Distal phalanges of palmar surface medial 4 digits 
Inn: Medial portion - ulnar nerve 
Lateral portion - median nerve 
Bs: anterior interosseuous artery 
Action: Flexor of DIP jts 
flexion of MCP jts
flexes hand at wrist jt

Question 2

[intermediate]

Flexor digitorum superficialis

Answer 2

O: Humeroulnar head: medial epicondyle of humerus
Ins: middle phalanges of medial 4 digits
Inn: Median nerve
Bs: Ulnar artery
Action: flexor of PIP jts
flexor of forearm at elbow jt, hand at wrist jt, and MCP jts

Question 3

Pronator quadratus

Answer 3

O: Distal anterior surface of ulna 
Ins: Distal anterior surface of radius
Inn: median nerve 
Bs: Anterior interosseous artery
Action: Pronation

Question 4

Flexor pollicis longus

Answer 4

O: anterior surface of radius and interosseous membrane
Ins: Palmar surface base of distal phalanx of thumb
Inn: Median nerve
Bs: Anterior interosseous artery
Action: flexor of IP jt of thumb
Flexion MCP joint of thumb
Flexion of hand at wrist jt