Abductor Pollicis Longus

Question 1

Abductor Pollicis Longus (ORIGIN)

Answer 1

Posterior surfaces of the ulna, radius, and interosseous membrane

Question 2

Abductor Pollicis Longus (INSERTION)

Answer 2

Base of the first metacarpal

Question 3

Abductor Pollicis Longus (INNERVATION)

Answer 3

Radial nerve (posterior interosseous nerve, C7, C8)

Question 4

Abductor Pollicis Longus (BLOOD SUPPLY)

Answer 4

Posterior interosseous artery

Question 5

Abductor Pollicis Longus (ACTION)

Answer 5

Abducts and extends the thumb at the carpometacarpal joint