Wrist Extensor Muscles

Question 0

Distal attachment Extensor Carpi Radialis Longus

Answer 0

Radial side of dorsal aspect of base of 2nd metacarpal

Question 1

Proximal attachment Extensor Carpi Radialis Longus

Answer 1

Anterior part of lower third of supracondylar ridge of humerus and adjacent intermuscular septum
Occasionally attached to lateral epicondyle of humerus via common extensor tendon

Question 2

Nerve supply ECRL

Answer 2

Radial Nerve C6, C7

Question 3

Proximal attachment Extensor Carpi Radialis Brevis

Answer 3

Lateral epicondyle of humerus via common extensor tendon

Lateral (radial) collateral ligament of elbow joint

Question 4

Distal attachment Extensor Carpi Radialis Brevis

Answer 4

Radial side of base of 3rd metacarpal

Question 5

Nerve supply ECRB

Answer 5

Posterior Interosseous branch of Radial Nerve C6, C7, C8

Question 6

Proximal attachment Extensor Carpi Ulnaris

Answer 6

Lateral epicondyle of humerus via common extensor tendon

Posterior border of ulna

Question 7

Distal attachment Extensor Carpi Ulnaris

Answer 7

Tubercle on medial side of base of 5th metacarpal

Question 8

Nerve supply ECU, ED, EDM, EI, EPL, EPB, AbPL

Answer 8

Posterior Interosseous branch of Radial Nerve C7, C8

Question 9

Proximal attachment Extensor Digitorum

Answer 9

Lateral epicondyle of humerus via common extensor tendon, adjacent antebrachial fascia and intermuscular septa between it and adjacent muscles

Question 10

Distal attachment Extensor Digitorum

Answer 10

Dorsal digital expansion- dorsal aspect of base of middle phalanx and dorsal aspect of base of distal phalanx

Question 11

Proximal attachment Extensor Digiti Minimi

Answer 11

Lateral epicondyle of humerus via common extensor tendon, the antebrachial fascia and adjacent intermuscular septa

Question 12

Distal attachment Extensor Digiti Minimi

Answer 12

Dorsal digital expansion of little finger

Question 13

Proximal attachment Extensor Indicis

Answer 13

Lower part of posterior surface of ulna, just below EPL and adjacent part of interosseous membrane

Question 14

Distal attachment Extensor Indicis

Answer 14

Dorsal digital expansion on proximal phalanx of index finger

Question 15

Proximal attachment Extensor Pollicis Longus

Answer 15

Lateral part of Middle third of posterior surface of ulna and adjacent interosseous membrane

Question 16

Distal attachment Extensor Pollicis Longus

Answer 16

Dorsal surface of base of distal phalanx of the thumb

Question 17

Proximal attachment Extensor Pollicis Brevis

Answer 17

Middle part of posterior surface of radius, distal to Abductor Pollicis Longus and from adjacent interosseous membrane

Question 18

Distal attachment Extensor Pollicis Brevis

Answer 18

Dorsal surface of base of proximal phalanx of thumb

Question 19

Proximal attachment Abductor Pollicis Longus

Answer 19

Upper part of posterior surface of ulna, below Anconeus

Middle third of posterior surface of radius, below Supinator and intervening interosseous membrane

Question 20

Distal attachment Abductor Pollicis Longus

Answer 20

Radial side of base of 1st metacarpal, with a slip passing to trapezium