Muscles And Nerves Of The Arm And Forearm

Front 1

What movement(s) is the deltoid muscle responsible for?

Back 1

Anteversion, retroversion, rotation, abduction and adduction.

Front 2

Where does the deltoid muscle originate from?

Back 2

From the lateral third of the clavicle, the acromion and the scapular spine.

Front 3

What nerve(s) innervates the deltoid muscle?

Back 3

Axillary nerve (C5, C6)

Front 4

Where is the insertion of the deltoid muscle?

Back 4

Deltoid tuberosity of the humerus

Front 5

Where does the short head of the biceps brachii originate from?

Back 5

Coracoid process of the scapula

Front 6

Where does the long head of the biceps brachii originate from?

Back 6

Supraglenoid tubercle of the scapula

Front 7

What nerve(s) innervates the biceps brachii?

Back 7

Musculocutaneous nerve (C5, C6)

Front 8

Where is the insertion of the biceps brachii?

Back 8

Radial tuberosity

Front 9

What movement(s) is the biceps brachii responsible for? What other important function does it have?

Back 9

Flexion and supination of the elbow joint

Flexion, abduction and medial rotation of the humerus

It stabilizes the humeral head during deltoid contraction

Front 10

Where does the brachialis originate from?

Back 10

Distal half of the anterior surface of the humerus

Front 11

What movement(s) is the brachialis responsible for?

Back 11

Flexion at the elbow joint

Front 12

What nerve(s) innervates the brachialis?

Back 12

Musculocutaneous nerve (C5, C6) and radial nerve (C7)

Front 13

Where is the insertion of the brachialis?

Back 13

Ulnar tuberosity

Front 14

Where does the flexor carpi ulnaris originate from and where does it insert in to?

Back 14

Origin: Medial epicondyle of humerus and olecranon

Insertion: Pisiform hook of the hamate, base of fifth metacarpal

Front 15

Where does the flexor digitorum superficialis originate from and where does it insert in to?

Back 15

Origin: Medial epicondyle of humerus, coronoid process of the ulna and distal to the radial tuberosity

Insertion: The sides of the middle phalanges of the second through fifth digits

Front 16

Where does the palmaris longus originate from and where does it insert in to?

Back 16

Origin: Medial epicondyle of humerus

Insertion: Palmar aponeurosis

Front 17

Where does the flexor carpi radialis originate from and where does it insert in to?

Back 17

Origin: Medial epicondyle of humerus

Insertion: Base of the second metacarpal (and sometimes of the third metacarpal)

Front 18

Where does the pronator terres originate from and where does it insert in to?

Back 18

Origin: Medial epicondyle of humerus and coronoid process of the ulna

Insertion: Lateral surface of the radius

Front 19

What nerve innervates the pronator teres?

Back 19

Median nerve (C6, C7)

Front 20

What nerve innervates the flexor digitorum superficialis?

Back 20

Median nerve (C8, T1)

Front 21

What nerve innervates the flexor carpi radialis?

Back 21

Median nerve (C6, C7)

Front 22

What nerve innervates the flexor carpi ulnaris?

Back 22

Ulnar nerve (C7 - T1)

Front 23

What nerve innervates the palmaris longus?

Back 23

Median nerve (C7, C8)

Front 24

What movement(s) is the pronator teres responsible for?

Back 24

Pronation of forearm joints and (weak) flexion of elbow joint

Front 25

What movement(s) is the flexor digitorum superficialis responsible for?

Back 25

Flexion of second through fifth digits of hand and (weak) flexion of elbow joint

Front 26

What movement(s) is the flexor carpi radialis responsible for?

Back 26

Flexion and abduction (radial deviation) of the hand

Front 27

What movement(s) is the flexor carpi ulnaris responsible for?

Back 27

Flexion and adduction (ulnar deviation) of the hand

Front 28

What movement(s) is the palmaris longus responsible for?

Back 28

Palmar flexion and it tightens the palmar aponeurosis for gripping

Front 29

Where does the flexor digitorum profundus originate from and where does it insert in to?

Back 29

Origin: Proximal two-thirds of the flexor surface of the ulna and the adjacent interosseous membrane

Insertion: Palmar surface of the distal phalanges of the 2nd-5th digits

Front 30

Where does the flexor pollicis longus originate from and where does it insert in to?

Back 30

Origin: Distal one-fourth of the anterior surface of the ulna

Insertion: Palmar surface of the distal phalanx of the thumb

Front 31

What movement(s) is the digitorum profundus responsible for?

Back 31

Flexion of the wrist joints and the metacarpal phalangeal joints + proximal and distal interphalangeal joints of the 2nd-5th digits

Front 32

What movement(s) is the pollicis longus responsible for?

Back 32

Flexion and radial abduction of the hand

Opposition and flexion of the thumb

Front 33

What nerve(s) innervates the flexor digitorum profundus?

Back 33

Radial part (second + third digits): Median nerve (C8, C11)

Ulnar part (fourth + fifth digits): Ulnar nerve (C7-T1)

Front 34

Where does the pronator quadratus originate from and where does it insert to?

Back 34

Origin: Distal one-fourth of the anterior surface of the ulna

Insertion: Distal one-fourth of the anterior surface of the radius

Front 35

What movement(s) is the pronator quadratus responsible for? What other important function(s) does it have?

Back 35

Pronates the hand

It also stabilizes the distal radioulnar joint

Front 36

What nerve innervates the pronator quadratus?

Back 36

Median nerve (C7, C8)

Front 37

The upper trunk of the brachial plexus is made up of nerves that originate from where?

Back 37

C5, C6

Front 38

The middle trunk of the brachial plexus is made up of nerves that originate from where?

Back 38

C7

Front 39

The lower trunk of the brachial plexus is made up of nerves that originate from where?

Back 39

C8, T1