Thorax

Question 1

What are the 2 heads of Pectoralis Major and their origins?

Answer 1

Clavicular head:

Question 2

Where is the bifurcation of the trachea located

Answer 2

at the level of the sternal angle (of Louis)

Question 3

The trachea splits into?

Answer 3

right main bronchus and left main bronchus

Question 4

What separates the openings to the right main bronchus and left main bronchus

Answer 4

carina

Question 5

Why are aspirated objects more likely to lodge in the right bronchopulmonary tree?

Answer 5

The right main bronchus is wider and in a more vertical line with the trachea than the left

Question 6

What are the parts of the bronchial tree

Answer 6

PIC

Question 7

Intrasegmental vs Inter

Question 8

At mid inspiration, the inferior borders of the lungs and pleura cross what ribs at the midclavicular line, midaxillary line, and scapular line

Answer 8

PIC

Question 9

What is cupula in thorax?

Answer 9

pleural cupula is the portion of the parietal pleura which rises into the neck, over the summit of the lung above medial border of clavicle

Question 10

What are the 2 heads of Pectoralis Major and their origins?

Answer 10

Clavicular head: medial half of clavicle

Sternocostal head: anterior surface of sternum, superior 6 costal cartilages, and aponeurosis of external oblique

Question 11

Function and innervation of Latissimus Dorsi

Answer 11

Extend, medially rotate and adduct arm
Thoracodorsal Nerve

Question 12

Trapezius

Answer 12

Elevate, depress, and retract shoulder
Spinal Accessory (Cranial Nerve XI)

Question 13

When dissecting the axilla for breast cancer, which nerve look out for

Answer 13

Thoracodorsal nerve

Question 14

If you lose the thoracodorsal nerve, what can’t you do?

Answer 14

Wipe your ass

Question 15

Function and innervation of rhomboids

Answer 15

Elevate shoulder
Branches of brachial plexus

Question 16

Levator Scapulae

Answer 16

Elevate shoulder
Branches of brachial plexus

Question 17

Name the deep muscles of the back
Their function
Innervation

Answer 17

Splenius.capitis and cervicis
Erector spinae (Sacrospinalis) made of:
Spinalis
Longissimus
Ileocostalis
Semispinalis

Extend, bend to either side, and rotate the spinal column but DO NOT FLEX

Dorsal branches of spinal nerves

Question 18

Dermatome of middle finger

Answer 18

C7

Question 19

Dermatome of thumb

Answer 19

C6

Question 20

Dermatome of little finger

Answer 20

C8

Question 21

Dermatome of nipple

Answer 21

T4

Question 22

Dermatome of umbilicus

Answer 22

T10

Question 23

Dermatome of pubic symphisis

Answer 23

L1

Question 24

What are the superficial veins of the arm?

Answer 24

Cephalic, median cubital, and basilic

Question 25

Supraspinatous function/innervation

Answer 25

initiate abduction of arm/suprascapular nerve

Question 26

Infraspinatous

Answer 26

laterally rotate arm/suprascapular nerve

Question 27

Teres minor

Answer 27

laterally rotate arm/axillary nerve

Question 28

Subscapularis

Answer 28

medially rotate arm/brachial plexus

Question 29

Deltoid

Answer 29

abduct arm to 90 degrees, medially and laterally rotate arm, extend and flex arm/axillary nerve

Question 30

Teres major

Answer 30

medially rotate, adduct, and extend arm/brachial plexus

Question 31

what muscles make up the rotator cuff

Answer 31

supraspinatous, infraspinatous, teres minor, and subscapularis

Question 32

What muscles insert on greater tubercle of humerus?

Answer 32

Supraspinatous, Infraspinatous, Teres minor

Question 33

What muscle inserts on lesser tubercle of humerus?

Answer 33

Subscapularis

Question 34

What are the functions of the rotator cuff muscles?

Answer 34

abduct, medially and laterally rotate arm and prevent dislocation

Question 35

A patient presents with a winged scapula and can not abduct arm over 90 degrees

Answer 35

patient has damage to the long thoracic nerve and therefore the serratus anterior is paralyzed

Question 36

Serratus anterior function

Answer 36

protract scapula and abduct (raise) arm from horizontal for vertical

Question 37

d