Shoulder/Arm

Question 1

Origin & Insertion of the Deltoid

Answer 1

Origin:
-Lateral 1/3 of the clavicle
- Acromion
- Spine of scapula
Insertion:
Deltoid tuberosity

Question 2

Actions of the deltoid

Answer 2

all fibers:
- abduct the shoulders
Anterior Fibers:
- Flex the shoulder
- Medially rotate the shoulder
- Horizontally adduct the shoulder
Posterior Fibers:
- Extend the shoulder
- Laterally rotate the shoulder
- Horizontally abduct the shoulder

Question 3

Nerve of the deltoid

Answer 3

Axillary C5,6

Question 4

Origin & Insertion of the Trapezius

Answer 4

Origin:
-bump of knowledge (EOP)
-Medial portion of superior nuchal line of the occiput
- ligamentum nuchae
- SP C7- T12
Insertion:
- Lateral 1/3 of the clavicle
- Acromion
- Spine of the Scapula

Question 5

Actions of the Trapezius

Answer 5

Upper Fibers
Unilaterally:
- laterally flex head/neck to the same side
- Rotate head/neck to the opposite side
- Elevates the Scapula
- upwardly rotate the scapula
Bilaterally:
Extend the head/neck

Middle Fibers
Adduct the scapula
Stabilize the scapula

Lower Fibers
Depress the scapula
Upwardly rotate the scapula

Question 6

Nerve of the Trapezius

Answer 6

Spinal portion of cranial nerve XI
ventral ramus C2,3,4

Question 7

Origin & Insertion of Latissimus Dorsi

Answer 7

Origin:
-Inferior angle of the scapula
-SP of last 6 thoracic vertebrae
-Last 3 or 4 ribs
-Thoracolumbar fascia
- Posterior iliac crest
Insertion:
intertubercular groove of the humerus

Question 8

Action of Latissimus Dorsi

Answer 8

Extend the shoulder
Adduct the shoulder
Medially rotate the shoulder

Question 9

Nerve of Latissimus Dorsi

Answer 9

Thoracodorsal C6,7,8

Question 10

Origin & Insertion of Teres Major

Answer 10

Origin:
- Inferior angle of the scapula
- lower 1/3 of lateral border of the scapula
Insertion:
Crest of the lesser tubercle of the humerus

Question 11

Action of Teres Major

Answer 11

Extend the shoulder
Adduct the shoulder
Medially rotate the shoulder

Question 12

Nerve of Teres Major

Answer 12

Lower subscapular C5,6,7

Question 13

Origin & Insertion of Supraspinatus

Answer 13

Origin:
- Supraspinatus fossa of the scapula
Insertion:
Greater tubercle of the humerus

Question 14

Action of Supraspinatus

Answer 14

Abduct the shoulder
Stabilize the head of the humerus

Question 15

Nerve of Supraspinatus

Answer 15

Suprascapular C4,5,6

Question 16

Origin & Insertion of the Infraspinatus

Answer 16

Origin:
Infraspinatus fossa of the scapula
Insertion:
Greater tubercle of the humerus

Question 17

Action of Infraspinatus

Answer 17

Laterally rotate the shoulder
Adduct the shoulder
Stabilize the head of the humerus in glenoid cavity

Question 18

Nerve of Infraspinatus

Answer 18

Suprascapular C4,5,6

Question 19

Origin & Insertion of Teres Minor

Answer 19

Origin:
- Upper 2/3 of lateral border of scapula
Insertion:
Greater tubercle of the humerus

Question 20

Action of Teres Minor

Answer 20

Laterally rotate the shoulder
Adduct the shoulder
Stabilize the head of the humerus in glenoid cavity

Question 21

Nerve of Teres Minor

Answer 21

Axillary C5,6

Question 22

Origin & Insertion of Subscapularis

Answer 22

Origin:
- Subscapular fossa of the scapula
Insertion:
Lesser tubercle of the humerus

Question 23

Action of Subscapularis

Answer 23

Medially rotate the shoulder
Stabilize the head of the humerus in the glenoid cavity

Question 24

Nerve of Subscapularis

Answer 24

Upper and Lower subscapular C5,6,7

Question 25

Origin & Insertion of Rhomboid Major

Answer 25

Origin: - SP T2-T5 Insertion: - Medial border of the scapula - between the spine of the scapula and inferior angle

Question 26

Action of Rhomboid Major

Answer 26

Adduct the scapula Elevate the scapula Downwardly rotate the scapula

Question 27

Nerve of Rhomboid Major

Answer 27

Dorsal Scapular C4,5

Question 28

Origin & Insertion of Rhomboid Minor

Answer 28

Origin : - SP C7 & T1 Insertion: - Upper portion of medial border of the scapula across from the spine of the scapula

Question 29

Action of Rhomboid Minor

Answer 29

Adduct the scapula Elevate the scapula Downwardly rotate the scapula

Question 30

Nerve of Rhomboid Minor

Answer 30

Dorsal Scapular C4,5

Question 31

Origin & Insertion of Levator Scapula

Answer 31

Origin: TVP 1st-4th cervical vertebrae Insertion: - Medial border of the scapula - between superior angle and superior portion of the spine of scapula

Question 32

Action of Levator Scapula

Answer 32

Unilaterally: - Elevate the scapula - downwardly rotate the scapula - laterally flex the head and neck - rotate the head/neck same side Bilaterally: Extend the head/neck

Question 33

Nerve of Levator Scapula

Answer 33

Cervical 3,4 Dorsal scapular C4,5

Question 34

Origin & Insertion of Serratus Anterior

Answer 34

Origin: External surface of upper 8 or 9 ribs Insertions: Anterior surface of medial border of the scapula

Question 35

Actions of Serratus Anterior

Answer 35

With origin fix: -Abduct the scapula - Upwardly rotate the scapula - Depress the scapula - hold the medial border of the scapula against the rib cage With the scapula fixed: Elevates the thorax during forced inhalation

Question 36

Nerve of Serratus Anterior

Answer 36

Long thoracic C5-8

Question 37

Origin & Insertion of Pectoralis Major

Answer 37

Origin: - Medial half of clavicle - Sternum - Cartilage 1st-6 ribs Insertions: Crest of greater tubercle of humerus

Question 38

Actions of Pectoralis Major

Answer 38

All fibers: -Adduct the shoulder - Medially rotate the shoulder - Assist to elevate the thorax during forced inhalation Upper fibers: -Flex the shoulder - Horizontally adduct the shoulder Lower fibers: Extend the shoulders

Question 39

Nerves of Pec Major

Answer 39

Upper fibers: Lateral pectoral C5-7 Lower fibers: Lateral and medial pectoral C6-8, T1

Question 40

Origin & Insertion of Pec Minor

Answer 40

Origin: 3,4,5th ribs Insertions: Medial surface of coracoid process of the scapula

Question 41

Actions of Pec Minor

Answer 41

Depress the scapula Abduct the scapula Downwardly rotate the scapula •with the scapula fixed Assist to elevate the thorax during forced inhalation

Question 42

Nerves of Pec Minor

Answer 42

Medial pectoral Fibers from a communicating branch of the lateral pectoral C6-8 , T1