Pectoral Girdle and Arm Muscles

Question 1

what do the shoulder muscles connect?

Answer 1

scapula, clavicle, body wall to the humerus

Question 2

what is the function of the shoulder muscles?

Answer 2

move the shoulder joints

Question 3

what is the origin of the deltoid muscle?

Answer 3

Scapula, clavicle

Question 4

what is the insertion of the deltoid muscle?

Answer 4

Humerus

Question 5

what innervates the deltoid muscle?

Answer 5

axillary nerve

Question 6

what is the function of the deltoid on the arm?

Answer 6

Anterior fibres- flex
Middle fibers- abduct
Posterior fibres- extend

Question 7

what are the shoulder muscles?

Answer 7

deltoid
pectoralis major
latissimus dorsi
teres major

Question 8

what is the origin of the pectoralis major?

Answer 8

Clavicle
sternum
costal cartilages

Question 9

where does the pectoralis major insert?

Answer 9

Humerus

Question 10

what is the function of the pectoralis major?

Answer 10

Flexion, adduction and medial rotation of arm

Question 11

what is the origin of the latissimus dorsi?

Answer 11

spinous processes of the vertebrae, iliac crest, inferior ribs

Question 12

where does the latissimus dorsi insert?

Answer 12

Humerus

Question 13

what is the function of the latissimus dorsi?

Answer 13

Extend, adduct, medially rotate the arm

Question 14

what is the origin of teres major?

Answer 14

inferior angle of the scapula

Question 15

where is the insertion of the teres major?

Answer 15

humerus

Question 16

what is the function of teres major?

Answer 16

Extend, adduct, medially rotate arm

Question 17

what are the shoulder muscles anterior to posterior?

Answer 17

Pectoralis major
Long tendons of biceps
Letissimus dorsi
Teres major

Question 18

what are the pectoral girdle muscles?

Answer 18

Trapezius
Levator scapulae
Rhomboids

Question 19

what is the origin of the trapezius?

Answer 19

occipital bone

Question 20

where does the trapezius insert?

Answer 20

clavicle
- scapula (spine and acromion)

Question 21

what is the function of the trapezius on the scapula?

Answer 21

Superior fibres- elevate
Horizontal fibers- retract
Inferior fibers- depress
Rotation

Question 22

where is the origin of the levator scapulae?

Answer 22

Transverse processes of cervical vertebrae

Question 23

where does the levator scapulae insert?

Answer 23

Superior angle of scapula

Question 24

what is the function of the levator scapulae?

Answer 24

elevate scapula

Question 25

what is the origin of the rhomboids?

Answer 25

Spinous processes of the vertebrae

Question 26

where does the rhomboids insert?

Answer 26

medial border of the scapula

Question 27

what is the function of the rhomboid?

Answer 27

retract scapula

Question 28

what do the rotator cuff muscles connect?

Answer 28

the scapular and clavicle to the humerus

Question 29

what is the general function of the rotator cuff muscles?

Answer 29

-to support glenohumeral joint -All rotate humerus, except for supraspinatus

Question 30

where do the rotator cuff muscles attach?

Answer 30

Attach to the greater tubercle, except for subscapularis (which attaches to the lesser tubercle)

Question 31

what is the function of the rotator cuff muscles?

Answer 31

-Supraspinatus initiates abduction -Infraspinatus and Teres minor laterally roates the humerus -subscapularis medially rotates the humerus

Question 32

what are the implications of rotator cuff impingement?

Answer 32

Inflammation (tendinitis, bursitis) Swelling and pain Impairs movement Possible rupture of tendons capsular weakness

Question 33

what is located in the anterior compartment of the arm?

Answer 33

-flexors -Muscles: Biceps brachii, Brachialis, Coracobrachialia -Nerve: MusculoCutaneous nerve

Question 34

what is located in the posterior compartment of the arm?

Answer 34

Extensors Muscles: triceps brachii Nerve: radial nerve

Question 35

where is the insertion site of triceps brachii?

Answer 35

Olecranon of ulna

Question 36

where is the origin of triceps brachii?

Answer 36

Long head: infra glenoid tubercle of scapula Medial head: humerus Lateral head: humerus

Question 37

what is the function of triceps brachii?

Answer 37

Extend arm and forearm

Question 38

what is the origin of biceps brachii?

Answer 38

Long head: supraglenoid tubercle of scapula Short head: coracoid process

Question 39

what is the insertion of biceps brachii?

Answer 39

Radial tuberosity

Question 40

what is the function of biceps brachii?

Answer 40

Flex arm and forearm Supinate forearm

Question 41

what is the origin of the coracobrachialis?

Answer 41

Coracoid process

Question 42

where does the coracobrachialis insert?

Answer 42

Humerus

Question 43

what is the function of coracobrachialia?

Answer 43

Flex arm Adduct arm

Question 44

what is the origin of brachialis?

Answer 44

Humerus

Question 45

what is the insertion site of brachialis?

Answer 45

Coronoiud process of Ulna

Question 46

what is the function of Brachialis?

Answer 46

Flex forearm

Question 47

what is the brachial artery?

Answer 47

-continuation of axillary artery -runs on medial forearm -divides into radial and ulnary arteries

Question 48

what are the brachial veins?

Answer 48

deep, and run with brachial artery

Question 49

what are the large superficial arm veins?

Answer 49

cephalic and basilic veins

Question 50

what crosses between the superficial and deep arm veins?

Answer 50

the median cubital vein crosses between them

Question 51

what innervates the anterior arm muscles?

Answer 51

Musculocutaneous nerve

Question 52

what innervates the posterior arm muscles?

Answer 52

radial nerve