Mostly Shoulder Muscle O I A N

Question 1

Anterior Deltoid

Answer 1

O: Lateral 1/3 of clavicle
I: Deltoid Tuberosity
A: Flexion, Medial Rotation, Horizontal Adduction
N: Axillary

Question 2

Middle Deltoid

Answer 2

O: Acromion
I: Deltoid Tuberosity
A: Abduction
N: Axillary

Question 3

Posterior Deltoid

Answer 3

O: Scapular Spine
I: Deltoid Tuberosity
A: Extension, Lateral Rotation, Horizontal Abduction
N: Axillary

Question 4

Trapezius, O I N

Answer 4

O: External Occipital Protuberance, Medial portion of Superior Nuchal Line of Occiput, Ligamentum Nuchae, Spinous Processes of C7-T-12
I: Lateral 1/3 of clavicle, acromion, and scapular spine

Question 5

Trapezius: Upper, A

Answer 5

Bilaterally: Extend head and neck
Unilaterally: Laterally flex head and neck to same side
Rotate head and neck to opposite side
Elevate scapula
Upwardly rotate scapula

Question 6

Trapezius: Middle, A

Answer 6

Adduct scapula

Stabilize scapula

Question 7

Trapezius: Lower, A

Answer 7

Depress scapula

Upwardly rotate scapula

Question 8

Latissimus Dorsi

Answer 8

O: Spinous process of T6-T12, last 3-4 ribs, thoracolumbar aponeurosis, posterior iliac crest
I: Lesser Tubercle
A: Extension, Adduction, Medial Rotation
N: Thoracodorsal

Question 9

Teres Major - “Lat’s little helper”

Answer 9

O: Inferior angle and lower half of lateral scapular border
I: Lesser Tubercle
A: Extension, Adduction, Medial Rotation
N: Lower subscapular

Question 10

Supraspinatus

Answer 10

O: Supraspinous fossa of scapula
I: Greater tubercle
A: Abduction, stabilization
N: Suprascapular

Question 11

Infraspinatus

Answer 11

O: Infraspinous fossa
I: Greater tubercle
A: Lateral rotation, Adduction, Extension, Horizontal Abduction, stabilization of humeral head
N: Suprascapular

Question 12

Teres Minor

Answer 12

O: Lateral border of Scapula
I: Greater tubercle
A: Lateral rotation, Adduction, Extension, Horizontal Abduction, stabilization
N: Axillary

Question 13

Subscapularis

Answer 13

O: Subscapular fossa
I: Lesser tubercle
A: Medial Rotation, stabilization
N: Upper and Lower Subscapular

Question 14

Rhomboid Major

Answer 14

O: Spinous processes of T2-T5
I: Medial border of scapula
A: Adduct scapula, Elevate scapula, Downward rotate scapula
N: Dorsal scapular

Question 15

Rhomboid Minor

Answer 15

O: Spinous processes of C7-T1
I: Medial border of scapula
A: Adduct, elevate, downward rotate scapula
N: Dorsal scapular

Question 16

Levator Scapula

Answer 16

O: Transverse processes of C1-C4
I: Medial border and Superior angle of scapula
A: Unilaterally: Elevate Scapula, downwardly rotate scapula, Laterally flex head/neck, Rotate head/neck to same side
Bilaterally: Extend head and neck
N: Dorsal scapular and cervical nerves

Question 17

Serratus Anterior

Answer 17

O: Ribs 1-8 or 9
I: Anterior surface of medial border of scapula
A: With origin fixed - Abduct scapula, depress scapula, hold medial border of scapula against rib cage
With scapula fixed - May act in forced inhalation
N: Long Thoracic

Question 18

Pectoralis Major

Answer 18

O: Medial half of clavicle, sternum , and cartilage of 1-6 ribs
I: Greater tubercle
N: Medial and Lateral Pectoral

Question 19

Pec Major: All fibers, A

Answer 19

A: Adduction, medial rotation, assist in forced inhalation (if arm is fixed)

Question 20

Pec Major: Upper Fibers, A

Answer 20

A: Flexion, Horizontal adduction

Question 21

Pec Major: Lower Fibers, A

Answer 21

A: Extension

Question 22

Pectoralis Minor

Answer 22

O: 3-5 ribs
I: Coracoid process
A: Depress scapula, Abduct scapula, Tilt scapula anterior
N: Medial Pectoral

Question 23

Subclavius

Answer 23

O: First rib
I: Inferior, Lateral aspect of clavicle
A: Draw clavicle inferior and anterior, Elevate first rib, Stabilize sternoclavicular joint
N: Subclavian

Question 24

Biceps Brachii

Answer 24

O: Short head - Coracoid process
Long head: Supraglenoid tubercle
I: Radial tuberosity and aponeurosis of biceps brachii
A: Elbow flexion, Supination, Shoulder flexion
N: Musculocutaneous

Question 25

Triceps Brachii

Answer 25

O: Longhead - Infraglenoid tubercle
Lateral Head - Posterior surface of proximal humerus
Medial head - Posterior surface of distal humerus
I: Olecranon process
A: Elbow extension
Long head - Shoulder extension, shoulder Adduction
N: Radial

Question 26

Coracobrachialis

Answer 26

O: Coracoid process
I: Medial surface of mid-humeral shaft
A: Shoulder Flexion, Adduction
N: Musculocutaneous

Question 27

Short N Sweet: Scapular Elevation

Answer 27

• Upper Trap

- Levator Scap

Question 28

Short N Sweet: Scapular Depression

Answer 28

• Lat Dorsi
• Pec Major
• Pec Minor
• Lower Trap

Question 29

Short N Sweet: Scapular Protraction

Answer 29

• Serratus Anterior

- Pec Minor

Question 30

Short N Sweet: Scapular Retraction

Answer 30

• Middle Trap

- Rhomboids

Question 31

Short N Sweet: Scapular Upward Rotation

Answer 31

• Upper Trap
• Lower Trap
• Serratus Ant

Question 32

Short N Sweet: Scapular Downward Rotation

Answer 32

• Rhomboids
• Levator Scap
• Pec Minor

Question 33

Short N Sweet: Shoulder Flexion

Answer 33

• Ant Delt
• Coracobrachialis
• Pec Major
• Biceps brachii

Question 34

Short N Sweet: Shoulder Extension

Answer 34

• Lat Dorsi
• Post Delt
• Teres Major
• Triceps Brachii, long head

Question 35

Short N Sweet: Shoulder Abduction

Answer 35

• Middle Delt

- Supraspinatus

Question 36

Short N Sweet: Shoulder Adduction

Answer 36

• Pec Major
• Lat Dorsi
• Teres Major

Question 37

Short N Sweet: Shoulder Horizontal Abduction

Answer 37

• Post Delt
• Infraspinatus
• Teres Minor

Question 38

Short N Sweet: Shoulder Horizontal Adduction

Answer 38

• Anterior Delt

- Pec Major

Question 39

Short N Sweet: Shoulder Lateral Rotation

Answer 39

• Teres Minor
• Infraspinatus
• Posterior Delt

Question 40

Short N Sweet: Shoulder Medial Rotation

Answer 40

• Subscap
• Teres Major
• Pec Major
• Lat Dorsi
• Ant Delt