A.O.I.N.s of Superficial Back, Scapular Region, & Posterior Arm

Question 1

What does the term “Origin” mean?

Answer 1

The immobile region of muscle attachment

Question 2

What does the term “Insertion” mean?

Answer 2

The mobile region of muscle attachment

Question 3

What is the point of origin for the Trapezius?

Answer 3

1. Superior nuchal line
2. External occipital protuberance
3. Ligamentum Nuchae
4. Spines of the thoracic vertebrae

Question 4

What is the point of insertion for the trapezius?

Answer 4

1. Clavicle
2. Acromion Process
3. Spine of the Scapula

Question 5

What is the action of the Trapezius?

Answer 5

1. Stabilizes the scapula
2. Elevates the scapula (the upper part of the trapezius stabilizes it)
3. Adducts and depresses the scapula (the middle and lower parts of the trapezius)

Question 6

What nerve(s) innervate the trapezius?

Answer 6

Motor Innervation - C.N. 11/Spinal Accessory Nerve

Sensory Innervation: C.N. 3 & 4

Question 7

What is the point of origin for the rhomboid major?

Answer 7

Spines of the upper thoracic vertebrae

Question 8

What is the point of insertion for the rhomboid major?

Answer 8

Medial/Vertebral border of the scapula

Question 9

What is the action of the rhomboid major?

Answer 9

1. Elevates the scapula
2. Adducts the scapula
3. Stabilize the scapula

Question 10

What nerve(s) inserts the rhomboid major?

Answer 10

Dorsal Scapular Nerve/C5

Question 11

What is the point of origin for the rhomboid minor?

Answer 11

Spines of the lower cervical vertebrae and the first thoracic vertebrae

Question 12

What is the point of insertion for the rhomboid minor?

Answer 12

Medial/Vertebral border of the scapula

Question 13

What is the action of the rhomboid minor?

Answer 13

1. Elevates the scapula
2. Adducts the scapula
3. Stabilizes the scapula

Question 14

What nerve(s) innervate the rhomboid minor?

Answer 14

Dorsal Scapular Nerve/C5

Question 15

Origin of the Levator Scapula?

Answer 15

The transverse processes of the upper cervical vertebrae

Question 16

Insertion of the Levator Scapula?

Answer 16

Superior angle of the scapula

Question 17

What is the action of the Levator Scapula?

Answer 17

1. Elevate the scapula
2. Adducts the scapula
3. Stabilizes the scapula

Question 18

What nerve(s) innervate the Levator Scapula?

Answer 18

Dorsal Scapular Nerve/C5

Question 19

What is the origin of the latissimus dorsi?

Answer 19

1. Spines of the lower thoracic and lumbar vertebrae
2. Thoracodorsal Fascia
3. Crest of the ilium
4. Lower ribs

Question 20

What is the point of insertion for the latissimus dorsi?

Answer 20

Intertubercular groove/lesser tubercule of the humerus

Question 21

What is the action of the latissimus dorsi?

Answer 21

1. Extends, adducts, & medially rotates the humerus
2. Forced expiration

Question 22

What nerve(s) innervates the latissimus dorsi?

Answer 22

Thoracodorsal nerve/C6, C7, C8

Question 23

Origin of Pectoralis Major?

Answer 23

1. Clavicle
2. Sternum & upper ribs
3. External & oblique muscles

Question 24

Insertion of pectoralis major?

Answer 24

Greater tuberosity of the humerus

Question 25

Action of pectoralis major?

Answer 25

1. Adducts & medially rotates the humerus 2. Forded inspiration Clavicular Portion: Flexes the humerus at the shoulder joint Sternocostal Portion: Extends the humerus at the shoulder joint

Question 26

Nerve innervation of the Pectoralis Minor?

Answer 26

Medial and Lateral pectoral nerves/ C8-T1 & C5-C7

Question 27

Origin of pectoralis minor?

Answer 27

Ribs 3-5

Question 28

Insertion of pectoralis minor?

Answer 28

Coracoid process of the scapula

Question 29

Actions of the pectoralis minor?

Answer 29

1. Abducts the scapula 2. Forced inspiration

Question 30

Nerve supply of pectoralis minor?

Answer 30

Medial Pectoral nerve

Question 31

Origin of subclavius?

Answer 31

First rib

Question 32

Insertion of subclavius?

Answer 32

Subclavian groove of the clavicle

Question 33

Actions of the subclavius?

Answer 33

1. Pulls the clavicle medially 2. Protects clavicle and subclavian blood vessels

Question 34

Nerve supply to subclavius?

Answer 34

Subclavian nerve/C5-C6

Question 35

Origin of serratus anterior?

Answer 35

Upper 8 or 9 ribs

Question 36

Insertion of serratus anterior?

Answer 36

Medial/vertebral border of the scapula

Question 37

Actions of serratus anterior?

Answer 37

1. Abducts the scapula 2. Stabilizes the scapula

Question 38

Nerve supply of serratus anterior?

Answer 38

Long thoracic/C5, C6, C7

Question 39

Origin of the deltoid muscle?

Answer 39

1. Clavicle 2. Acromion process 3. Spine of the scapula

Question 40

Insertion of deltoid?

Answer 40

Deltoid tuberosity of the humerus

Question 41

Actions of the deltoid?

Answer 41

Anterior Portion: Flexes and medially rotates the humerus Middle portion: Abducts the humerus Posterior Portion: Extends & Laterally rotates the humerus

Question 42

Nerve supply of deltoid?

Answer 42

Axillary Nerve/C5, C6

Question 43

Origin of supraspinatous?

Answer 43

Supraspinatous fossa of the scapula

Question 44

Insertion of supraspinatous?

Answer 44

Greater tuberosity of the humerus

Question 45

Actions of supraspinatous?

Answer 45

1. Abducts the humerus 2. Laterally rotates the humerus 3. Stabilizes the shoulder joint

Question 46

Nerve supply to supraspinatous?

Answer 46

Suprascapular nerve/C5 & C6