CHAPTER 16 : Forearm Elbow joint and the Back of the hand

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Anterior Compartment
2.2 The contents include:  
  • Superficial muscles: pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris
  • Intermediate muscle: flexor digitorum superficialis
  • Deep muscles: flexor pollicis longus, flexor digitorum profundus, pronator quadratus
  • Ulnar and radial arteries
  • Median
  • Ulnar nerve
Superficial muscles  
Pronator teres, Flexor carpi radialis, Palmaris longus, Flexor carpi ulnaris
Intermediate muscles  
flexor digitorum superficialis(1)

 

 
Deep muscles  

flexor pollicis longus, flexor digitorum profundus, pronator quadratus

The deep muscles have varied attachments.

Flexor digitorum profundus from medial side of olecranon, upper ulna and the interrosseous membrane to distal phalanx.
Flexor pollicis from anterior surface of radius below oblique line to base of distal phalanx of pollex
Pronator quadratus [PQ] from the distal ulnar to lower quarter of radius

note the flexor digitorum superficials tendons [F.D.S] reflected and the flexor digitorum profundus tendons [F.D.P]

 
 

Note:
For power grip, flexors are more powerful than extensors
The superficial and intermediate muscles have a common origin with three muscles having additional points of origin

  Which are these additional points of origin?
............Which of the muscles have these additional origins?

Pronator teres