Chapter 4 Quiz

Question 1

Flexor Digitorum Profundus Origin

Answer 1

anterior and medial surfaces of the proximal ulna

Question 2

Flexor Digitorum Profundus Insertion

Answer 2

4 tendons into the anterior surface of the base of the distal phalanges

Question 3

Flexor Digitorum Profundus Peripheral N.

Answer 3

1st & 2nd = Median n.

3rd & 4th = Ulnar n.

Question 4

Flexor Digitorum Profundus N. Root

Answer 4

C8, T1

Question 5

Flexor Digitorum Profundus Function

Answer 5

• flexion of DIP joints (except thumb)
• assists in flexion of PIP and MCP joints
• assists in wrist flexion

Question 6

Flexor Digitorum Superficialis Origin

Answer 6

Humeral Head: common flexor tendon (medial epicondyle of the humerus); UCL
Ulnar Head: medial side of coronoid
Radial Head: oblique line of radius

Question 7

Flexor Digitorum Superficialis Insertion

Answer 7

4 tendons into sides of middle phalanges of digits 2-5

Question 8

Flexor Digitorum Superficialis Peripheral N.

Answer 8

Median

Question 9

Flexor Digitorum Superficialis N. Root

Answer 9

C7, 8, T1

Question 10

Flexor Digitorum Superficialis Function

Answer 10

• flex the PIP of digits 2-5

- assists in flexion of wrist and MCP joints

Question 11

Extensor Digitorum Origin

Answer 11

common extensor tendon (lateral epicondyle)

Question 12

Extensor Digitorum Insertion

Answer 12

4 tendons penetrating expansion hoot of digits 2-5

• divides over proximal phalanx into a medial band and two lateral bands
• lateral bands reunite over middle phalanx and insert on distal phalanx

Question 13

Exensor Digiti Minimi Origin

Answer 13

common extensor tendon (lateral epicondyle)

Question 14

Extensor Digiti Minimi Insertion

Answer 14

extensor expansion of little finger with the extensor digitorum tendon

Question 15

Extensor Indicis Origin

Answer 15

posterior surface of the ulna, distal to the extensor pollicis longus origin

Question 16

Extensor Indicis Insertion

Answer 16

extensor expansion of the index finger with the extensor digitorum profundus tendon

Question 17

ED, EI, EDM Peripheral N.

Answer 17

Radial

Question 18

ED, EI, EDM Nerve Roots

Answer 18

C6, 7, 8

Question 19

Extensor Digitorum Function

Answer 19

• extend MCP joints
• extend IP joints with interossei and lumbricals
• assists in abduction of index, ring, and little finger
• assists in wrist extension and radial deviation

Question 20

Extensor Indicis Function

Answer 20

• extend MCP joint of index finger

- extends IP joints w/ lumbricals and interossei

Question 21

Extensor Digiti Minimi Function

Answer 21

• extend MCP joint of little finger
• extends IP joints of the little finger
• assists in abduction of the little finger