Forearm- Flexor and Extensor Compartments

Enumerate the superficial muscles of flexor compartment of forearm.

• Pronator teres
• Flexor carpi radialis
• Palmaris longus
• Flexor digitorum superficialis
• Flexor carpi ulnaris

Enumerate the Deep muscles of flexor compartment of forearm.

• Flexor pollicis longus
• Flexor digitorum profundus
• Pronator quadratus

Name the muscles of flexor compartment of forearm supplied by median nerve.

6 ½  muscles of flexor compartment of forearm  are innervated by median nerve.

• Pronator teres
• flexor carpi radialis
• Palmaris longus
• Flexor digitorum superficialis
• Flexor pollicis longus
• Flexor digitorum profundus ( lateral ½ )
• Pronator quadrates 

Name the muscles of forearm supplied by ulnar nerve.

 1 ½ muscles innervated by ulnar nerve 

• Flexor carpi ulnaris
• Flexor digitorum profundus (medial ½ )

Enumerate the structures passing superficial to the flexor retinaculum (From lateral to medial side).

• Palmar cutaneous branch of median nerve
• Tendon of Palmaris longus
• Palmar cutaneous branch of ulnar nerve
• Ulnar artery
• Ulnar nerve

 Enumerate the structures passing deep to flexor retinaculum (through the carpal tunnel).

• Flexor digitorum superficialis tendons
• Flexor digitorum profundus tendons
   (Long flexor tendons share the same synovial sheath, referred to as the ulnar bursa)
• Flexor pollicis longus tendon which has its own synovial sheath, named the radial bursa
• Median nerve.

Write in a tabulated form the origin, insertion, action and nerve supply of superficial muscles of flexor compartment of forearm.

 Superficial Muscles of Flexor Compartment of Forearm

Write in a tabulated form the origin, insertion, action and nerve supply of deep muscles of flexor compartment of forearm.

 Deep Muscles of Flexor Compartment of Forearm

Enumerate the structures passing deep to extensor retinaculum.

The space deep to extensor rinaculum is divided into six compartments by fibrous septa extending from the deep surface of extensor retinaculum to the dorsal aspect of the lower ends of  radius and ulna. The structures passing through these 6 compartments from lateral to medial are:

1. Abductor pollicis longus and extensor pollicis brevis
2. Extensor carpi radialis longus and brevis
3. Extensor pollicis longus
4. Extensor digitorum , extensor indicis, posterior interrosseous nerve and anterior interrosseous artery.
5. Extensor digiti minimi
6. Extensor carpi ulnaris

Write in a tabulated form the origin, insertion, action and nerve supply of superficial muscles of extensor compartment of forearm.

Superficial Muscles of Extensor Compartment of Forearm

Write in a tabulated form the origin, insertion, action and nerve supply of deep muscles of extensor compartment of forearm.

A. Deep Muscles of Extensor Compartment of Forearm