Anatomy 2- Shoulder and pectoral griddle 2

Question 1

what position must the arm be so you can dislocate the shoulder joint

Answer 1

completely abduct

Question 2

what is the fascia of the pectoral region attached to

Answer 2

clavicle and sternum

Question 3

which of the following is most superior and medial, origin or insertion

Answer 3

origin

Question 4

what is the function of the pectoralis major

Answer 4

adduct and medially rotate humerus

Question 5

what is the innervation of the pectoralis major

Answer 5

lateral and medial pectoral nerves

Question 6

what is the function of the pectoralis minor

Answer 6

stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

Question 7

what is the innervation of the pectoralis minor

Answer 7

medial pectoral nerve

Question 8

what is the function of the subclavius

Answer 8

anchors and depresses clavicle

Question 9

what is the innervation of the subclavius

Answer 9

nerve to subclavius

Question 10

what is the function of the serratus anterior

Answer 10

protracts scapula and holds it against thoracic wall, rotates scapula,

its also called the “boxers muscle”

Question 11

what is the innervation of the serratus anterior

Answer 11

long thoracic nerve

Question 12

the paralysis of the serratus anterior casques what condition? and injury to which nerve causes this paralysis a9ln?

Answer 12

scapular winging

cut the long thoracic nerve

Question 13

what is the function of the trapezius

Answer 13

• rotate scapula for full abduction
• elevate the shoulder
• retract the shoulder
• draw scapula downward

Question 14

what is the innervation of the trapezius

Answer 14

accessory nerve

Question 15

what is the function of the latissimus dorsi

Answer 15

extend…adduct…medially rotate the humerus

Question 16

what is the innervation of the latissimus dorsi

Answer 16

thoracodorsal nerve

Question 17

what is the function of the rhomboid minor and major

Answer 17

• retract scapula
• rotate scapula to depress glenoid cavity
• fix scapula to thoracic wall

Question 18

what is the innervation of the rhomboid minor and major

Answer 18

dorsal scapular nerve

Question 19

what is the function of the levator scapulae

Answer 19

• elevates scapula

- tilts the glenoid cavity inferiorly by rotating scapula

Question 20

what is the innervation of the levator scapulae

Answer 20

dorsal scapular nerves and cervical nerves

Question 21

what is the function of the deltoid

Answer 21

• abduct the arm with supraspinatous

- medial and lateral rotation

Question 22

what is the innervation of the deltoid

Answer 22

axillary nerve

Question 23

what is the function of the subscapularis

Answer 23

medial rotate and adduct arm

Question 24

what is the innervation of the subscapularis

Answer 24

upper and lower subscapular nerves

Question 25

what is the function of the supraspinatus

Answer 25

• initiates abduction (deltoid takes over)

- lateral rotator of humerus

Question 26

what is the innervation of the supraspinatus

Answer 26

suprascapular nerve

Question 27

what is the function of the infraspinatus and teres minor

Answer 27

laterally rotate arm

Question 28

what is the innervation of the infraspinatus and teres minor

Answer 28

infraspinatus: suprascapular nerve

teres minor: axillary nerve

Question 29

what is the function of the teres major

Answer 29

adduct and medially rotate arm

Question 30

what is the innervation of the teres major

Answer 30

lower subscapular nerve