Shoulder muscles

Question 1

Muscles: Shoulder (Anterior View)

Identify 1 - 3

Answer 1

1. Pectoralis major muscle
2. Trapezius muscle
3. Deltoid muscle

Question 2

Muscles: Shoulder (Anterior View)

Identify 4 - 6

Answer 2

4. Cephalic vein
5. Biceps brachii muscle
6. Latissimus dorsi muscle

Question 3

Muscles: Shoulder (Anterior View)

Identify 2. O & I

Answer 3

Deltoid muscle
O - Medial clavicle and upper sternum
I - Intertubercular groove of humerus

Question 4

Muscles: Shoulder (Anterior View)

Identify 1. Actions

Answer 4

Pectoralis major muscle

-> Arm adduction, assists rotation

Question 5

Muscles: Shoulder (Anterior View)

Identify 1. Nerve supply

Answer 5

Pectoralis major muscle

-> Medial and lateral pectoral nerves (C5-T1)

Question 6

Muscles: Shoulder (Anterior View)

Identify 2. o & i

Answer 6

2. Trapezius muscle

O - Occipital bone, ligamentum nuchae, spinous processes C7-T12
I - Lateral clavicle, medial acromion, scapular spine

Question 7

Muscles: Shoulder (Anterior View)

Identify 2. ACTIONS

Answer 7

2. Trapezius muscle

- > Primarily scapular rotation

Question 8

Muscles: Shoulder (Anterior View)

Identify 2. INNERVATION

Answer 8

2. Trapezius muscle

- > Spinal accessory nerve (cranial nerve XI)

Question 9

Muscles: Shoulder (Anterior View)

Identify 3.O & I

Answer 9

3. Deltoid muscle
   -> O - Clavicle, acromion, scapular spine
   I - Deltoid tuberosity, humerus

Question 10

Muscles: Shoulder (Anterior View)

Identify 3. ACTIONS

Answer 10

3. Deltoid muscle

- > Primarily abduction, flexion, extension

Question 11

Muscles: Shoulder (Anterior View)

Identify 3. INNERVATION

Answer 11

3. Deltoid muscle

- > Axillary nerve (C5-6)

Question 12

Muscles: Shoulder (Anterior View)

Identify 6. O & I

Answer 12

6. Latissimus dorsi muscle
   O - T6-L5 spinous processes
   I - Intertubercular groove of humerus

Question 13

Muscles: Shoulder (Anterior View)

Identify 6. ACTIONS

Answer 13

6. Latissimus dorsi muscle

- Shoulder extension, adduction, and internal rotation

Question 14

Muscles: Shoulder (Anterior View)

Identify 6. INNERVATION

Answer 14

6. Latissimus dorsi muscle

- Thoracodorsal nerve

Question 15

Muscles: Shoulder (Anterior View)

Identify 3. O & I

Answer 15

Levator scapulae muscle
O - Transverse process of C1-4
I - Superior medial scapula

Question 16

Muscles: Shoulder and Upper Arm (Posterior View)

Answer 16

1. Deltoid muscle
2. Trapezius muscle
3. Levator scapulae muscle
4. Teres major muscle
5. Triceps brachii muscle

Question 17

Muscles: Shoulder and Upper Arm (Posterior View)

Identify 3. Actions

Answer 17

Levator scapulae muscle

-> Scapular elevation and rotation

Question 18

Muscles: Shoulder and Upper Arm (Posterior View)

Identify 3. Innervation

Answer 18

Levator scapulae muscle

-> Third and fourth cervical nerves, dorsal scapular nerve (C5)

Question 19

Muscles: Shoulder and Upper Arm (Posterior View)

Identify 4. O & I

Answer 19

Teres major muscle
O - Inferior angle of the scapula
I - Medial intertubercular groove of humerus

Question 20

Muscles: Shoulder and Upper Arm (Posterior View)

Identify 4. ACTIONS

Answer 20

Teres major muscle

-> Helps extend, adduct, and medially rotate the arm

Question 21

Muscles: Shoulder and Upper Arm (Posterior View)

Identify 4. INNERVATION

Answer 21

Teres major muscle

-> Lower subscapular nerve (C5-C6, C6-C7)

Question 22

What are the 4 muscles of rotator cuff?

Answer 22

1. Subscapularis muscle
2. Supraspinatus muscle
3. Infraspinatus muscle
4. Teres minor muscle

Question 23

Muscles: Rotator Cuff

Identity 1. O & I

Answer 23

1. Subscapularis muscle
   O - Subscapular fossa and lateral border of scapula
   I - Lesser tuberosity of humerus

Question 24

Muscles: Rotator Cuff

Identity 1. ACTIONS

Answer 24

1. Subscapularis muscle

- Shoulder internal rotation and adduction

Question 25

Muscles: Rotator Cuff Identity 1. INNERVATION

Answer 25

1. Subscapularis muscle | - Subscapular nerves (C5-6)

Question 26

Muscles: Rotator Cuff Identity 2. O & I

Answer 26

2. Supraspinatus muscle O - Supraspinous fossa of scapula I - Greater tuberosity of humerus

Question 27

Muscles: Rotator Cuff Identity 2. ACTIONS

Answer 27

2. Supraspinatus muscle | - Shoulder abduction, external rotation

Question 28

Muscles: Rotator Cuff Identity 2. INNERVATION

Answer 28

2. Supraspinatus muscle | - Suprascapular nerve (C5-6)

Question 29

Muscles: Rotator Cuff Identity 3. O & I

Answer 29

3. Infraspinatus muscle O - Infraspinous fossa of scapula I - Greater tuberosity of humerus

Question 30

Muscles: Rotator Cuff Identity 3. ACTIONS

Answer 30

3. Infraspinatus muscle | - Shoulder external rotation

Question 31

Muscles: Rotator Cuff Identity 3. INNERVATION

Answer 31

3. Infraspinatus muscle | - Suprascapular nerve (C5-6)

Question 32

Muscles: Rotator Cuff Identity 4. O & I

Answer 32

4. Teres minor muscle O - Lateral border of the scapula I - Greater tuberosity of humerus

Question 33

Muscles: Rotator Cuff Identity 4. ACTIONS

Answer 33

4. Teres minor muscle | - Shoulder external rotation and assists with adduction

Question 34

Muscles: Rotator Cuff Identity 4. ACTIONS

Answer 34

4. Teres minor muscle | - Axillary nerve (C5-6)