Muscles of the Arm Flashcards Preview

Anatomy > Muscles of the Arm > Flashcards

Flashcards in Muscles of the Arm Deck (22):
1

How many muscles are in the arm?

3 anteriorly
1 posteriorly

2

Which 3 muscles are in the anterior compartment?

Biceps brachii
Brachialis
Coracobrachialis

3

Which nerve innervates the muscles of the anterior forearm?

Musculocutaneous

4

What is special about the Biceps brachii?

It has 2 heads, the long head and short head

5

Where does the long head of the Biceps brachii attach?

Supraglenoid tubercle of the Scapula

6

Where does the short head of the Biceps brachii attach?

Corocoid process of the Scapula

7

Where does the tendon of the Biceps brachii attach?

To the radial tuberosity

8

What is the action of the Biceps brachii?

Supination of the forearm
Flexion at the elbow
Flexion at the shoulder

9

Which spinal cord segment can be tested by tapping on the Biceps Brachii tendon at the radial tuberosity?

C6

10

Which tendon of the Biceps brachii is most likely to rupture?

The long head tendon

11

What is the sign for a Biceps brachii tendon rupture?

Popeye sign on flexing the elbow

12

Where is the coracobrachialis in relation to the Biceps brachii?

Deep

13

What is the main action of the Coracobrachialis?

Flexion at the shoulder

14

What are the attachment points for the Coracobrachilalis?

Coracoid process of the Scapula
Medial side of shaft of the humerus

15

Where is the Brachialis in relation to the Biceps brachii?

Deep

16

What is the main action of the Brachialis?

Main flexor at the elbow

17

What are the attachment points of the Brachialis?

Medial and lateral surface of the humerus
Tuberosity of the Ulna

18

What is the only muscle in the posterior compartment of the arm?

The Triceps brachii

19

What is special about the Triceps brachii muscle?

It has 3 heads; Long, lateral and medial

20

What is the main action of the Triceps brachii?

Extension at the elbow

21

What innervates the Triceps brachii?

The radial nerve

22

Which spinal cord segment can be tested by tapping on the Triceps brachii tendon?

C7