Pectoral Region

Question 1

What are the bony landmarks on the sternum?

Answer 1

Manubrium
- Clavicular notch
- Jugular notch

Body

Xiphoid process

Question 2

What are the bony landmarks of the clavicle

Answer 2

Acromial end
Sternal end
inferior surface
- conoid tubercle
- trapezoid line
Anterior border
posterior border

Question 3

what are the manubrium attachments

Answer 3

pectoralis major

Question 4

what does the clavicular notch (on manubrium) articulate with?

Answer 4

clavicle

Question 5

What muscle attaches to the body of the sternum

Answer 5

pectoralis major

Question 6

what does the acromial end of the clavicle articulate with?

Answer 6

acromion

Question 7

what is the function of the sternal end of the clavicle ?

Answer 7

articulates with sternum

Question 8

what muscle attaches to the superior surface of the clavicle ?

Answer 8

sternocleidomastoid muscle

Question 9

what muscle attaches to the inferior surface of the clavicle ?

Answer 9

subclavius muscle

Question 10

on the inferior surface of the clavicle, there are the conoid tubercle and the trapezoid line, what attaches onto these landmarks?

Answer 10

Conoid - conoid ligament
Trapezoid - trapezoid ligament

Question 11

what attaches on the anterior border of the clavicle

Answer 11

pectoralis major muscle and deltoid muscles

Question 12

what attaches on the posterior border of the clavicle ?

Answer 12

trapezius muscle

Question 13

where does the pectoralis major attach onto?

Answer 13

from:
clavicle
costal cartilages
sternum
aponeurosis of the external oblique

TO:
lateral lip of the intertubercular sulcus of humerus

Question 14

what are the actions of the pec major

Answer 14

humeral adduction
flexion
medial rotation

Question 15

What innervates the pec major?

Answer 15

lateral and medial pectoral nerves

Question 16

What are the two heads of the pectoralis major

Answer 16

sternocostal head (more medial to sternum)
&
Clavicular head more later and superior to clavicle

Question 17

what are the deep layer of pectoral region muscles

Answer 17

pectoralis minor
subclavius muscle

Question 18

what are the pec minor attachments

Answer 18

from:
outer surfaces of the ribs, 3-5

To:
coracoid process

Question 19

what are the pec minor actions

Answer 19

anterior tilt of scapula
assist with depression of the shoulder
forced inspiration

Question 20

What innervates the pec minor

Answer 20

medial and lateral pectoral nerves

Question 21

describe where the subclavius is?

Answer 21

inferior to to the clavicle
superior to the first rib
it is deep the pectoralis major muscle

Question 22

where does the subclavius muscle attach to

Answer 22

from:
1st rib and cartilage

To:
undersurface of the clavicle

Question 23

what are the subclavius actions

Answer 23

depresses clavicle
stabilize clavicle

Question 24

what innervates the subclavius

Answer 24

subclavian nerve

Question 25

what are the joints of the pectoral region

Answer 25

sternoclavicular acromioclavicular glenohumeral scapulothoracic

Question 26

what type of joint is sternoclavicular joint

Answer 26

saddle Joint

Question 27

Explain sternoclavicular joint Convex/concave structure

Answer 27

superior to inferior Clavicle - convex Manubrium - concave Anterior to posterior Clavicle - concave manubrium - convex

Question 28

what type of joint is the acromioclavicular joint

Answer 28

plane (gliding joint)

Question 29

what ligaments hold the AC joint together

Answer 29

from lateral to medial -acromioclavicular ligament -Coracoclavicular ligament - trapezoid lig - conoid lig

Question 30

glenohumeral joint, classification

Answer 30

ball and socket

Question 31

what is the function of the scapulothoracic joint

Answer 31

pseudo-joint necessary for full glenohumeral function

Question 32

what is the function of the coracoclavicular joint

Answer 32

stabilizes acromioclavicular joint limiting medial displacement, protraction, and elevation

Question 33

where does the trapezoid ligament attach to?

Answer 33

from coracoid process to trapezoid line of clavicle

Question 34

where does conoid attach to

Answer 34

from coracoid process to conoid tubercle of clavicle

Question 35

what is the function of acromioclavicular ligament

Answer 35

stabilize AC joint

Question 36

what are the attachments for the AC ligament

Answer 36

from superior aspect of acromial end to end of the clavicle adjacent acromion

Question 37

what is the function and attachments of the coracoacromial ligament

Answer 37

function: prevents the superior displacement of the humeral head by forming the coracoacromial arch attachments from lateral border of coracoid process to acromion adjacent to clavicular articulation

Question 38

what is the function and attachments for coracohumeral ligament

Answer 38

function: reinforces superoanterior aspects of joint capsule attachments from base of coracoid process to anterior aspect greater tubercle

Question 39

what is the function and attachments for costoclavicular lig.

Answer 39

function stabilize sternoclavicular joint, limiting elevation of the clavicle attachments from superior aspect of cartilage of first rib to undersurface of clavicle

Question 40

what is the function and attachments of the costoclavicular joint

Answer 40

function: stabilizes sternoclavicular joint and limit elevation of the clavicle attachments from superior aspect of cartilage of first rib to undersurface of clavicle

Question 41

what are the 3 ligaments of glenohumeral ligament

Answer 41

superior middle inferior

Question 42

what is the function of glenohumeral ligs

Answer 42

stabilize glenohumeral articulation

Question 43

what are the glenohumeral ligs attachments

Answer 43

from upper part of medial margin of glenoid cavity to less tubercle of anatomical neck

Question 44

the subclavian artery turns into what artery after it passes inferiorly to the clavicle

Answer 44

axillary artery

Question 45

what is the main branch off the axillary artery that supplies pec region

Answer 45

thoracoacromial artery

Question 46

what are the usual 4 branches of the thoracoacromial artery

Answer 46

pectoral branches acromial branch deltoid branch clavicular branch

Question 47

how do you name the arterial supply in the pec region because there is so much variation?

Answer 47

it's called the thoracoacromial artery until you follow it to its location and then name it.

Question 48

on a dermatome map, what parts of the skin are covered for the pectoral region

Answer 48

C5-T4