Anterior compartment of forearm (Intermediate layer)

Question 1

What is the muscle in the intermediate layer?

Answer 1

Flexor digitorum superficialis (FDS)

Question 2

What is the proximal attachment of the flexor digitorum superficialis on the humero-ulnar head?

Answer 2

Medial epicondyle (common flexor origin and coranoid process)

Question 3

What is the proximal attachment of the flexor digitorum superficialis on the radial head?

Answer 3

Superficial half of anterior border

Question 4

Where is the distal attachment of the flexor digitorum superficialis?

Answer 4

Shafts of middle phalanges of medial four digits

Question 5

What is the innervation of the flexor digitorum superficialis?

Answer 5

Median nerve (C7, C8, T1)

Question 6

What is the main action of the flexor digitorum superficialis?

Answer 6

Flexes middle phalanges at proximal interphalangeal joints of middle four digits; acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints