Antebrachial Muscles

Question 1

Anterior Antebrachial Compartment Muscles

Answer 1

Superficial: Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, flexor digitorum superficialis
Deep: flexor digitorum profundus, flexor pollicis longus, pronator quadratus

Question 2

Superficial Anterior Antebrachial Group

Answer 2

Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris, flexor digitorum superficialis

Question 3

Deep Anterior Antebrachial Group

Answer 3

Flexor digitorum profundus, flexor pollicis longus, pronator quadratus

Question 4

CLOIFIn

Answer 4

Compartment (Anterior/Posterior)
Location (Deep/Superficial)
Origin
Insertion
Function
Innervation

Question 5

Pronator Teres CLOIFIn

Answer 5

C: Anterior
L: Superficial
O: Medial epicondyle of humerus
I: Crosses over to the middle lateral part of the radius
F: Pronation
In: Median nerve (C6 and C7)

Question 6

Flexor Carpi Radialis CLOIFIn

Answer 6

C: Anterior
L: Superficial
O: Medial epicondyle of humerus
I: Anterior surface of the base of 2nd metacarpal bone
F: Flexes wrist and radial deviation
In: Median nerve C6,7

Question 7

Palmaris Longus CLOIFIn

Answer 7

C: Anterior
L: Superficial
O: Medial epicondyle of humerus
I: Flexor retinaculum and palmar aponeurosis
F: Flexes wrist and anchors palmar skin and fascia
In: Median nerve C7,8
(only 25% of people have this)

Question 8

Flexor Carpi Ulnaris CLOIFIn

Answer 8

C: Anterior
L: Superficial
O: Medial epicondyle of humerus
I: Pisciform, hamate
F: Flexes wrist and ulnar deviation
In: Ulnar nerve C7,8,T1

Question 9

Flexor Digitorum Superficialis CLOIFIn

Answer 9

C: Anterior
L: Superficial, but deep to the other superficial muscies. It is the barrier between the superficial and deep muscles.
O: Medial epicondyle of humerus
I: Anterior PIP (proximal interphalangeal) joints of digits
F: Flexes the 4 fingers and wrist
In: Median nerve C8, T1

Question 10

Flexor digitorum profundus CLOIFIn

Answer 10

C: Anterior
L: Deep
O: Proximal part of ulna
I: Distal phalanges of fingers (crosses DIP joint)
F: Flexes wrist, Metacarpal joints (MCP), and both IPs
In: Median and ulnar nerves (C8 and T1)

Question 11

Flexor Pollicis Longus CLOIFIn

Answer 11

C: Anterior
L: Deep
O: Interosseous border of radius
I: Anterior surface of distal phalanx of thumb
F: Flexes thumb - brings it across the palm
In: Median nerve C7,8

Question 12

Pronator Quadratus CLOIFIn

Answer 12

C: Anterior
L: Deep
O: Anterior surface of radius and ulna
I: Other lateral border (radius/ulna)
F: Pronates hand
In: Median nerve C7,8

Question 13

Posterior Lateral Muscles

Answer 13

Brachioradialis, extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, extensor carpi ulnaris, supinator, anconeus

Question 14

Brachioradialis CLOIFIn

Answer 14

C: Posterior
L: Lateral
O: Above lateral epicondyle of humerus
I: Radial styloid process
F: Flexes elbow (even though it's a posterior muscle), stabilizes elbow joint during rapid elbow movements
In: Radial nerve C5,6

Question 15

Extensor Carpi Radialis Longus CLOIFIn

Answer 15

C: Posterior
L: Lateral
O: Lateral epicondyle
I: dorsal portion of pointer finger metacarpal
F: extends rist and radial deviation
In: Radial nerve C6,7

Question 16

Extensor Carpi Radialis Brevis CLOIFIn

Answer 16

C: Posterior
L: Lateral
O: Lateral epicondyle
I: dorsal portion of middle finger metacarpal
F: Extends wrist and radial deviation
In: Radial nerve C7,8

Question 17

Extensor Digitorum Muscle CLOIFIn

Answer 17

C: Posterior
L: Lateral
O: Lateral epicondyle
I: Posterior distal phalanges of all 4 digits
F: wrist and finger extension
In: Radial nerve C7,8

Question 18

Extensor Digiti Minimi CLOIFIn

Answer 18

C: Posterior
L: Lateral
O: Lateral epicondyle
I: Distal phalange of pinky finger
F: Extends pinky finger, all joints
In: Radial nerve C7,8

Question 19

Extensor Carpi Ulnaris CLOIFIn

Answer 19

C: Posterior
L: Lateral
O: Posterior side of lateral epicondyle
I: Medial surface of pinky finger metacarpal
F: Extends wrist and ulnar deviation
In: Radial nerve C7,8

Question 20

Supinator CLOIFIn

Answer 20

C: Posterior
L: Lateral
O: Lateral epicondyle
I: Wraps around head of radius
F: Supination, but biceps brachii is a better supinator
In: Radial nerve C6,7

Question 21

Anconeus CLOIFIn

Answer 21

C: Posterior
L: Lateral
O: Dorsal surface of lateral epicondyle
I: Lateral surface of olecranon
F: Partially extends elbow (assists triceps brachii)
In: Radial nerve C7,7

Question 22

Posterior Radial Muscles

Answer 22

Absuctor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis

Question 23

Abductor Pollicis Longus CLOIFIn

Answer 23

C: Posterior
L: Radial
O: Dorsal surface of proximal end of radius
I: Metacarpal of thumb
F: Abducts thumb - brings it away from the palm in front of it, and extension.
In: Radial nerve C7,8

Question 24

Extensor Pollicis Longus CLOIFIn

Answer 24

C: Posterior
L: Radial
O: Middle of dorsal surface of radius
I: Distal phalange of thumb
F: Extends the thumb
In: Radial nerve C7,8

Question 25

Extensor Pollicis Brevis CLOIFIn

Answer 25

C: Posterior
L: Radial
O: Middle of dorsal surface of radius
I: Only crosses the MCP joint
F: Extends the thumb metacarpal and proximal phalanx 
In: Radial nerve C7,8

Question 26

Extensor Indicis CLOIFIn

Answer 26

C: Posterior
L: Radial
O: Dorsal surface of distal end of ulna
I: Distal phalange of pointer finger
F: Extends pointer finger and wrist
In: Radial nerve C7,8