Back and Shoulder Superficial

Question 1

Bones of Pectoral Girdle

Answer 1

Clavicle and Scapula

- incomplete boney ring

Question 2

Pectoral girdle purpose

Answer 2

attachment + support upper limb

Question 3

Horseshoe of the pectoral girdle

Answer 3

spine of the scapula
acromian
clavicle

(seen from superior view)

Question 4

Important muscles attached to pectoral girdle

Answer 4

Trapezius (insertion)

• lat. 1/3 of clavicle
• acromion
• spine of the scapula

Deltiod (Origin)

• lat. 1/3 of clavicle
• acromion
• spine of the scapula

** SAME

Question 5

Scapula Landmarks

Answer 5

Anterior:
Coracoid process
Subscapular Fossa
Suprascupular notch

Posterior:
Acromion
Spine of the scapula
Supraspinous fossa
infraspinous fossa

Lateral View:
Glenoid cavity of the scapula
supraglenoid tubercle
infraglenoid tubercle
spinoglenoid notch

Question 6

Ligament that travels through suprascapular notch

Answer 6

suprascapular ligament

Question 7

Humerus landmarks

Answer 7

Anterior:
Greater tubercle
Lesser tubercle
Intertubercular Groove
Deltiod tuberosity

Question 8

Surround the head of the humerus

Answer 8

anatomical neck of the humerus

Question 9

Surrounds the head of the humerus and the greater/lesser tubercles

Answer 9

surgical neck of the humerus (commonly broken)

Question 10

Posterior Axioappendicular (Thoracoappendicular) Muscles

Answer 10

Superficial (extrinsic shoulder):

• Trapezius
• Latissimus Dorsi

Deep (extrinsic shoulder):
Levator scapula
rhomboid minor + major

Question 11

Trapezius origin + insertion

Answer 11

Origin:
base of skull
Nuchal ligament
spinous process (C7-T12)

Insertion:
Lat. 1/3 of clavicle
acromion
spine of the scapula

Question 12

Trapezius action

Answer 12

elevation, retraction and depression of the scapula

• work together: upward rotation of the scapula (glenoid fossa)

Question 13

Trapezius Innervation

Answer 13

spinal accessory nerve

Question 14

Latissimus Dorsi origin

Answer 14

Spinous process of lower thoracic vert.
Thoracolumbar fascia
Iliac crest (+ lumbar vert)

Question 15

Latissimus Dorsi insertion

Answer 15

floor of the inter tubercular groove of the humerus

Question 16

Latissimus Dorsi action

Answer 16

Extension of humerus at shoulder joint
adduction of humerus
medial rotation of humerus

Question 17

Latissimus Dorsi innervation

Answer 17

thoracodorsal nerve

Question 18

Levator scapulae origin

Answer 18

Transverse processes c 1-4

Question 19

Levator scapulae insertion

Answer 19

Medial border of scapula at level ABOVE the spine

Question 20

Levator scapulae action

Answer 20

elevation of scapula

rotation of scapula - glenoid fossa down

Question 21

Levator scapulae innervation

Answer 21

dorsal scapular nerve

nerve also innervates rhomboids

Question 22

Rhomboid Minor origin

Answer 22

Spinous processes C7-T1

Question 23

Rhomboid Minor insertion

Answer 23

medial border of scapula AT level of spine

Question 24

Rhomboid Action

Answer 24

Retraction of scapula

Rotation of scapula - glenoid fossa down

Question 25

Rhomboid innervation

Answer 25

dorsal scapular nerve

Question 26

Rhomboid Major origin

Answer 26

Spinous Processes T2-T5

Question 27

Rhomboid Major insertion

Answer 27

Medial border of scapula at level BELOW the spine

Question 28

Scapulohumeral muscles meaning

Answer 28

attaches scapula to humerus

Question 29

Scapulohumeral muscles (intrinsic shoulder)

Answer 29

``` deltoid supraspinatus* infraspinatus* teres minor* teres major subscapularis* ``` *Rotator cuff

Question 30

Intrinsic meaning

Answer 30

contained wholly within the organ or body part on which it acts

Question 31

Rotator Cuff Muscles

Answer 31

SITS supraspinatus infraspinatus teres minor subscapularis

Question 32

Suprapinatus origin

Answer 32

supraspinous fossa of scapula

Question 33

Suprapinatus insertion

Answer 33

greater tubercle of humerus: superior facet*

Question 34

Suprapinatus action

Answer 34

abduction of humerus | stabilize shoulder

Question 35

Suprapinatus innervation

Answer 35

suprascapular nerve

Question 36

Infraspinatus origin

Answer 36

infraspinous fossa of scapula

Question 37

Infraspinatus insertion

Answer 37

greater tubercle of humerus: middle facet*

Question 38

Infraspinatus action

Answer 38

lateral rotation of the humerus | stabalize shoulder

Question 39

Infraspinatus innervation

Answer 39

suprascapular nerve

Question 40

Teres minor origin

Answer 40

lateral border of scapula

Question 41

Teres minor insertion

Answer 41

greater tubercle of humerus: Inferior facet

Question 42

Teres minor

Answer 42

lateral rot. of humerus stabilize shoulder (same as infraspinatus, muscles often blended together)

Question 43

Teres minor innervation

Answer 43

axillary nerve

Question 44

Subscapularis origin

Answer 44

subscapular fossa | anterior side of scapula

Question 45

Subscapularis insertion

Answer 45

lesser tubercle of humerus

Question 46

Subscapularis action

Answer 46

medial rotation of humerus | stabilize shoulder

Question 47

Subscapularis innervation

Answer 47

upper and lower subscapular nerves

Question 48

Deltoids origin is the same as the insertion of what muscle?

Answer 48

Trapezius

Question 49

Deltoid origin

Answer 49

lateral 1/3 of the clavicle acromion spine of the scapula

Question 50

Deltoid insertion

Answer 50

deltoid tuberosity of the humerus | approximately half way down on the lateral side

Question 51

Deltoid action

Answer 51

Anterior deltoid: flexion of humerus medial rot of humerus Middle deltoid: abduction of humerus Posterior Deltoid: Extension of the humerus Lateral rotation of the humerus

Question 52

Deltoid innervation

Answer 52

Axillary nerve

Question 53

Teres Major origin

Answer 53

Inferior angle of the scapula

Question 54

Teres Major insertion

Answer 54

lesser tubercle of the humerus

Question 55

Teres Major action

Answer 55

Adduction of the humerus Medial Rotation of the humerus (same as latisamus dorsi)