Shoulder & Arm

Question 1

Pectoralis minor (attachments, actions, innervation)

Answer 1

From ribs to corocoid process
Depresses, protracts, medially rotates scapula
Innervated by medial pectoral nerve

Question 2

Serratus anterior (attachments, actions, innervation)

Answer 2

From ribs to vertebral border of scapula
Protracts, depresses, laterally rotates scapula
Innervated by long thoracic nerve

Question 3

Levator scapule (actions, location, innervation)

Answer 3

Elevates scapula
Found deep to trapezius
Innervated by cervical plexus (C3,4)

Question 4

Rhomboids (actions, location, innervation)

Answer 4

Elevate, retract, and medially rotate scapula
Found deep to trapezius.
Innervated by dorsal scapular nerve

Question 5

Trapezius (actions and innervation)

Answer 5

Superior elevates / laterally rotates scapula
Middle retracts
Inferior depresses / laterally rotates scapula
Innervated by CN XI

Question 6

Which tendon of biceps travels through glenoid cavity, and where does it attach?

Answer 6

Long head attaches to supraglenoid tubercle

Question 7

Pectoralis major (actions and innervation)

Answer 7

Flexion, adduction, and medial rotation of glenohumeral joint (hugging muscle)
Innervated by musculocutaneous nerve

Question 8

Coracobrachialis (actions and innervation)

Answer 8

Flexion and adduction of GH joint

Innervated (and pierced) by musculocutaneous nerve

Question 9

Biceps (attachments and innervation)

Answer 9

Long head (lateral) attaches to supraglenoid tubercle.
Short (medial) head attaches to coronoid process
Attaches distally to radial tuberosity and bicipital aponeurosis
Innervated by musculocutaneous nerve

Question 10

Deltoid innervation

Answer 10

Innervated by axillary nerve

Question 11

Latissimus dorsi (actions, attachments, and innervation)

Answer 11

Extension, adduction, and medial rotation of GH joint
Attaches to anterior side of humerus
Innervated by thoracodorsal (midsubscapular) nerve.

Question 12

Teres major (actions and innervation)

Answer 12

Extension, adduction, and medial rotation of GH joint

Innervated by lower subscapular nerve

Question 13

Triceps (actions, attachments, and innervation)

Answer 13

Extension and adduction
Long head attaches to infraglenoid tubercle.
Lateral and medial heads attach to posterior surface of humerus.
Medial head is deep in cleft b/w lateral and long heads.
Distal tendon inserts into olecranon
Innervated by radial nerve, which passes b/w medial and lateral heads.

Question 14

Supraspinatous (actions and innervation)

Answer 14

Abduction

Innervated by supra scapular nerve

Question 15

Infraspinatous (actions and innervation)

Answer 15

Lateral rotation

Innervated by suprascapular nerve

Question 16

Teres minor (actions and innervation)

Answer 16

Lateral rotation

Innervated by axillary nerve

Question 17

Subscapularis (actions and innervation)

Answer 17

Medial rotation

Innervated by upper / lower subscapular nerves.

Question 18

Anconeus (actions and innervation)

Answer 18

Extends elbow

Innervated by radial nerve

Question 19

Brachialis (actions, attachments, and innervation)

Answer 19

Flexes elbow
Long head runs through intertubercular groove and attaches to supraglenoid tubercle.
Short head attaches to coracoid process and inserts distally to ulnar tuerosity
Innervated by musculocutaneous nerve.

Question 20

Brachioradialis (actions and innervation)

Answer 20

Flexes the elbow, but considered a posterior muscle.
Both pronates and supinates (handshake muscle)
Innervated by the radial nerve.

Question 21

Which direction do fibers in interosseus membrane run?

Answer 21

Fibers pass obliquely upward from ulna to radius and trasmit force from radius at wrist to ulna at elbow.

Question 22

Deep brachial artery runs with which nerve, and where?

Answer 22

Radial nerve

Run down shaft of humerus

Question 23

Which artery / nerve run in scapular notch?

Answer 23

Suprascapular artery / nerve

Question 24

Which artery runs with axillary nerve, and where?

Answer 24

Posterior circumflex

Both wrap around surgical neck of humerus

Question 25

Long thoracic nerve runs with which artery?

Answer 25

Lateral thoracic artery

Question 26

Brachial artery runs with which nerve?

Answer 26

Median nerve

Question 27

Which nerve runs with circumflex scapular artery?

Answer 27

Lower sub scapular nerve

Question 28

Which muscles protract the scapula?

Answer 28

Pectoralis minor | Serratus anterior

Question 29

Which muscles retract the scapula?

Answer 29

Trapezius (middle) | Rhomboids

Question 30

Which muscles elevate the scapula?

Answer 30

Trapezius (upper) Levator scapulae Rhomboids

Question 31

Which muscles depress the scapula?

Answer 31

Serratus anterior Pectoralis minor Trapezius (lower)

Question 32

Which muscles medially rotate the scapula?

Answer 32

Pectoralis minor | Rhomboids

Question 33

Which muscles laterally rotate the scapula?

Answer 33

Trapezius (all portions) | Serratus anterior

Question 34

Which muscles flex the shoulder?

Answer 34

Deltoid Short head of biceps Coracobrachialis Pectoralis major

Question 35

Which muscles extend the shoulder?

Answer 35

Deltoid Latissimus dorsi Teres major Triceps brachii

Question 36

Which muscle adduct the shoulder?

Answer 36

``` Pectoralis major Latisimus dorsi Teres major Coracobrachialis Deltoid (anterior and posterior) Triceps ```

Question 37

Which muscles abduct the shoulder

Answer 37

Deltoid (middle) | Supraspinatus

Question 38

Which muscles medially rotate the arm?

Answer 38

``` Subscapularis Pectoralis major Teres major Latissimus dorsi Deltoid (anterior) ```

Question 39

Which muscles laterally rotate the arm?

Answer 39

Teres minor Infraspinatus Deltoid (posterior)

Question 40

Cervical plexus (C3,4) innervates which muscle in the back?

Answer 40

Levator scapulae

Question 41

Dorsal scapular nerve innerates which muscles?

Answer 41

Levator scapulae | Rhomboids

Question 42

Suprascapular nerve innervates which muscles?

Answer 42

Supraspinatus | Infraspinatus

Question 43

Long thoracic nerve innervates which muscles?

Answer 43

Serratus anterior

Question 44

Upper subscapular nerve innervates which muscles?

Answer 44

Subscapularis

Question 45

Thoracodorsal (middle sub scapular) nerve innervates which muscles?

Answer 45

Latissimus dorsi

Question 46

Lower subscapular nerve innervates which muscles?

Answer 46

Subscapularis | Teres major

Question 47

Axillary nerve innervates which muscles?

Answer 47

Deltoid | Teres minor

Question 48

Musculocutaneous nerve innervates which muscles?

Answer 48

Coracobrachialis Biceps Brachialis

Question 49

Radial nerve innervates which muscles?

Answer 49

Brachioradialis Triceps Anconeus