Extensor Indicis

Question 1

Extensor Indicis (ORIGIN)

Answer 1

Posterior surface of the distal third of the ulna and interosseous membrane

Question 2

Extensor Indicis (INSERTION)

Answer 2

Extensor expansion of the second digit (index finger)

Question 3

Extensor Indicis (INNERVATION)

Answer 3

Radial nerve (posterior interosseous nerve, C7, C8)

Question 4

Extensor Indicis (BLOOD SUPPLY)

Answer 4

Posterior interosseous artery

Question 5

Extensor Indicis (ACTION)

Answer 5

Extends the index finger; assists in extending the hand at the wrist