Muscles of the Arm

Question 1

Part of body that extends from shoulder to the elbow

Answer 1

Arm

Question 2

The two groups of muscles that cause movement at the elbow joint

Answer 2

Anterior Flexors

Posterior Extensors

Question 3

Name the three anterior arm muscles

Answer 3

Biceps Brachii (long and short head)
Brachialis
Brachioradialis

Question 4

Anterior muscle of the arm that has two bellys, long and short, and two different origins with a common insertion

Answer 4

Biceps Brachii

Question 5

Which muscle of the biceps brachii is lateral?

Answer 5

Long head

Question 6

What are the actions of the biceps brachii?

Answer 6

Flexes forearm

Primary supinator against resistance like tightening a screw

Question 7

Biceps brachii that is medial and has a tendon attached to the corocoid process of the scapula that is often fused with the corachobrachialis

Answer 7

Short head

Question 8

Muscle of biceps brachii that has a rounded chord like tendon that crosses the shoulder joint within the capsule of the shoulder

Held in place by the transverse humeral ligament

Answer 8

Long head of the bicep

Question 9

The distal tendon of the biceps attaches to what structure?

What does it become after it continues after that point?

Answer 9

The radial tuberosity

It continues on to become the bicipital aponeurosis

Question 10

A fibrous sheet or expanded tendon that serves as a muscle attachment along the medial aspect of the proximal part of the forearm

Answer 10

Bicipital aponeurosis

Question 11

An area on the anterior surface of the elbow joint that is protected by the bicipital aponeurosis (veins lie superior to it for veinipuncture)

Answer 11

Cubital fossa

Question 12

Where the long head of the bicep originates

Answer 12

Scapula at supraglenoid tubercle

Question 13

When this tendon is torn, it results in a muscle bulge on the anterior of the arm known as the popeye deformity

Answer 13

Long head of the bicep

Question 14

Nerve that innervates both of the muscles of the biceps brachii

Answer 14

musculocutaneous nerve from the

Question 15

Biceps brachii are involved in which two types of movement?

Answer 15

Flexion and supination

Question 16

The long head of the bicep has the ability to do what to the shoulder because it crosses the shoulder joint?

Answer 16

Flex the shoulder

Question 17

Flattened muscle which lies deep to the biceps brachii

Answer 17

Brachialis

Question 18

Where is the origin of the brachialis?

Answer 18

Insertion of the Deltoid (Deltoid tuberosity)

Question 19

The brachialis is primarily responsible for what movement, particularly during slow movements?

Does it for both supinated and pronated positions unlike the biceps brachii.

Answer 19

Maintaining flexion of the forearm

Question 20

Muscle that ALWAYS contracts during flexion of the elbow joint

Answer 20

Brachialis

Question 21

What is the origin of the brachialis?

Answer 21

Coracoid process of the ulna

Question 22

What nerve innervates the brachialis?

Answer 22

Musculocutaneous nerve

Question 23

Arm muscle which may be considered part of the posterior forearm muscles that flexes the forearm, especially during quick movement

Answer 23

Brachioradialis

Question 24

Does the brachioradialis cross the wrist joint? Can it cause wrist movement?

Answer 24

No and No

Question 25

This muscle is active in rapid movements (flexion) of the forearm

Answer 25

Brachioradialis

Question 26

The brachioradialis inserts where?

Answer 26

The styloid process of the radius

Question 27

What is the origin of the brachioradialis?

Answer 27

Lateral supercondyle ridge.

Question 28

What innervates the brachioradialis?

Answer 28

The radial nerve

Question 29

The muscle that the musculocutaneous nerve goes through

Answer 29

Coracobrachialis

Question 30

Nerve that hooks around the posterior aspect of the humerus towards the forearm

Answer 30

Radial nerve

Question 31

The two posterior muscles of the arm

Answer 31

``` Triceps brachii (long, lateral, medial head) Anconeus ```

Question 32

Which muscle of the triceps brachii crosses the shoulder joint?

Answer 32

Long head

Question 33

Part of triceps brachii that lies deep to the long head and lateral heads that is often hard to see without pushing aside the lateral head

Answer 33

Medial head

Question 34

Lateral and medial heads of the tricep are separated by what structure?

Answer 34

The radial groove

Question 35

What nerve runs in the radial groove?

Answer 35

The radial nerve

Question 36

Group of muscles that is the main extensor of the elbow joint, and can aid in arm adduction

Answer 36

Triceps Brachii

Question 37

The long head of the triceps brachii originates where? The medial head of the triceps originates where? The lateral head of the triceps originates where?

Answer 37

Infraglenoid tubercle Posterior side of the humerus above radial groove Below radial groove

Question 38

Where do all the triceps brachii muscles insert?

Answer 38

Olecranon process of the ulna

Question 39

What nerve innervates the triceps brachii?

Answer 39

Radial nerve

Question 40

All extensors innervated by which nerve?

Answer 40

Radial nerve

Question 41

The long head crosses the shoulder joint allowing it to aid in what movement?

Answer 41

Adduction

Question 42

What muscle make up the triangular space? What structure does it contain?

Answer 42

Teres minor, teres major, long head of the triceps brachii Circumflex scapular artery

Question 43

What muscle make up the quadrangular space?

Answer 43

Teres minor, teres major, long head and lateral head of the triceps brachii

Question 44

What nerve runs through the quadrangular space?

Answer 44

Axillary nerve

Question 45

What muscles make up the triangular interval?

Answer 45

Teres major, long and lateral heads of triceps brachii

Question 46

What nerve lies deep in the triangular interval?

Answer 46

Radial nerve

Question 47

Small triangular muscle on the posterior side of the elbow covered by a thick layer of deep fascia

Answer 47

Anconeus

Question 48

What movement does the anconeus help with?

Answer 48

Extension of the forearm

Question 49

Where does the anconeus originate?

Answer 49

Lateral condyle of the humerus

Question 50

Where does the anconeus insert?

Answer 50

The olecranon process of the ulna

Question 51

What innervates the anconeus?

Answer 51

The radial nerve