Scapula, Deltoid, Pex & Axilla

Question 1

describe ribs 8-10

Answer 1

false ribs, vertebrochondral

Question 2

which ribs are atypical

Answer 2

1,2,11,12

Question 3

what innervates the breast?

what vascularizes it primarily?

Answer 3

ant. and lateral branches intercostal nerves 4-6

ant. intercostal, lateral thoracic, internal thoracic arteries

Question 4

what attaches the breast to dermis?

Answer 4

Cooper’s ligaments

Question 5

what is the venous drainage of the breast

Answer 5

lateral thoracic and medial mammary veins

Question 6

what makes up the borders of the clavipectoral triangle

Answer 6

deltoid, pec major, middle 1/3 clavicle

Question 7

what pierces the clavipectoral fascia?

what does it become?

Answer 7

cephalic vein, thoracoacromial a., lateral pectoral n.

suspensory ligament of axilla

Question 8

what innervates pec major?

Answer 8

lateral and medial pectoral nerves (C5-T1)

Question 9

what innervates pec minor?

what is its action?

Answer 9

medial pectoral n. (C8, T1)

pulls scapula inf. and ant. against post. thoracic wall

Question 10

subclavius action?

Answer 10

anchors and depress clavicle

Question 11

serratus ant action?

innervation?

Answer 11

protracts & rotates scapula, holds scapula against thorax

long thoracic nerve (C5,6,7)

Question 12

what muscle divides the axillary a. into 3 parts?

Answer 12

pec minor

Question 13

what comes off the 1st part of the axillary artery?

where is it located

Answer 13

sup. thoracic a.

medial/proximal

Question 14

what comes off the 2nd part of axillary a.

located?

Answer 14

thoracoacromial trunk
-pectroal, acromial, deltoid, (clavicular) branches

posterior

Question 15

what comes off the 3rd part of the axillary a.?

located?

Answer 15

subscapular a. (branches into thoracodorsal and circumflex scapular aa.)
ant. and post. circumflex humeral a.

distal/lateral

Question 16

what becomes the axillary vein?

Answer 16

basillic v.

Question 17

apex of axilla?

Answer 17

FCS
1st rib
clavicle
scapula

Question 18

roof of axilla

Answer 18

CAPS
chest wall
ant. and post. axillary fold
skin & superficial fascia

Question 19

ant. wall of axilla

Answer 19

PP

pec major and minor

Question 20

post. wall axilla

Answer 20

SLuTS
scapula
lats
teres major
subscapularis

Question 21

lateral wall axila

Answer 21

TiC
tendon of long head biceps
intertubercular suclus
coracobrachialis tendon

Question 22

where is the retromammary space located?

Answer 22

between the breast and pectoral fascia

Question 23

deltoid action

innervation

Answer 23

flex, medially rotates, abducts, extends, and laterally rotates humerus

axillary n. (C5, C6)

Question 24

what action can’t the deltoid do?

Answer 24

adduct

Question 25

teres major action? innervation

Answer 25

adducts and medially rotates humerus lower subscapular n. (C5, C6)

Question 26

supraspinatus action innervation

Answer 26

works w/deltoid in abduction of humerus to about 15 degrees, stabilize shoulder joint suprascapular n. (C4,5,6)

Question 27

what does impingement syndrome involve? what causes it?

Answer 27

supraspinatus tendon and/or subacromial bursa repetitive overhead actions, bone spurs, weird acromion

Question 28

subscapularis action innervation

Answer 28

medially rotates and ADDucts humerus, hold humeral head in place upper and lower subscapular nerves (C5, 6, 7)

Question 29

what is the largest and strongest rotator cuff muscle? what can injury in this muscle lead to?

Answer 29

subscapularis bicipital tendon instability and biceps tendonitis

Question 30

what holds the the long tendon of biceps brachii in the intertubercular groove?

Answer 30

transverse ligament

Question 31

infraspinatus action innervation

Answer 31

laterally rotate humerus, holds it in place suprascapular n. (C5, C6)

Question 32

teres minor action innervation

Answer 32

laterally rotate humerus, holds head in place axillary n. (C5, C6)

Question 33

what does the thyrocervical trunk branch into?

Answer 33

transverse cervical a. (superficial branch and deep branch aka dorsal scapular a.) suprascapular a. ascending cervical a. inferior thyroid a.

Question 34

part 2 of subclavian a.?

Answer 34

cost of deep dish supreme pizza? costocervical a. trunk -supreme intercostal a. -deep cervical a.

Question 35

quadrangular space? contents?

Answer 35

teres minor and major, long head and lateral head(surgical neck of humerus) of triceps axillary n. posterior circumflex humeral artery

Question 36

triangular space contents

Answer 36

teres major and minor, long head triceps -sup. to triangular interval circumflex scapular a.

Question 37

triangular interval contents

Answer 37

teres major, long head and lateral head triceps radial a. and deep brachial a.