Muscular System Pt. 6 - Muscles of The Anterior Forearm

Question 1

What are the anterior compartment of forearm muscles mainly known for?

Answer 1

Flexors of Wrist

Question 2

How many groups are there in the anterior compartment? How many muscles do they each have

Answer 2

Three groups: Superficial, Intermediate, and Deep
Superficial: 4 Muscles
Intermediate: 1 Muscle
Deep: 3 Muscles

Superficial group all have common flexor origin (Medial epicondyle of humerus)

Question 3

What are the muscles that make up the superficial anterior forearm muscles

Answer 3

Pronator Teres, Flexor carpi radialis, Palmaris longus, Flexor carpi ulnaris

Question 4

Origin of Superficial Anterior Forearm Muscles

Answer 4

Medial epicondyle of the humerus

Question 5

Insertions of Pronator Teres

Answer 5

Lateral side of radius

Question 6

Insertion of Flexor Carpi Radialis

Answer 6

Metacarpals

Question 7

Insertion of palmaris longus

Answer 7

Palmar aponeurosis

Big connective tissue deep to the skin all on the palm

Question 8

Insertion of flexor carpi ulnaris

Answer 8

Pisiform; metacarpals

More towards the ulnar side

Question 9

Which superficial anterior forearm muscles display elbow flexion?

Answer 9

Pronator Teres, Flexor Carpi Radialis, Palmaris longus, and Flexor Carpi ulnaris

All 4 of them

Question 10

Which superficial anterior forearm muscles display wrist flexion?

Answer 10

All except for Pronator Teres

Question 11

What action is unique to Pronator Teres?

Answer 11

Pronates forearm

No wrist flexion

Question 12

What muscles make up the Intermediate anterior forearm muscles?

Answer 12

Flexor Digitorium Superficialis or FDS

Flexing the digits on the outside

Question 13

Origin of Flexor Digitorium Superficialis (FDS)

Answer 13

Medial Epicondyle of humerus (CFO), Ulna and Radius

Question 14

Insertions of Flexor Digitorium Superficialis (FDS)

Answer 14

Middle phalanges from digits 2-5

Question 15

Actions of FDS

Answer 15

Flexion of elbow, wrist and fingers

DOES NOT GO THROUGH DISTAL PHALANX (only the other two)

Question 16

Which muscles make up the Deep anterior forearm muscles

Answer 16

Flexor Digitorum Profundus (FDP), Flexor Pollicis Longus (FPL), Pronator quadratus (PQ)

Unlike the superficial, does not have a CFO

Question 17

Origin of FDP

Answer 17

Ulna and interosseous membrane

Question 18

Insertion of FDP

Answer 18

Distal phalanges

DIGITS 2-5 ONLY; also goes through the split in the tendons that hold FDS

Question 19

Actions of FDP

Answer 19

Flexion of wrist and fingers

Distal phalanges of 2-5 only because it goes through the tendon of FDS to insert on the distal

Question 20

Origin of FPL

Answer 20

Radius and Interosseus membrane

Question 21

Insertion of FPL

Answer 21

Distal phalanx of thumb

Question 22

Actions of FPL

Answer 22

Flexion of wrist and thumb

Question 23

Origin of Pronator Quadratus (PQ)

Answer 23

Ulna

When contracting, it pulls toward ulna => pronation

Question 24

Insertion of PQ

Answer 24

Radius

Question 25

Actions of PQ

Answer 25

Forearm pronation