Unit 1

Question 1

pectoralis major o-i

Answer 1

origin: clavicle, sternum, and upper 6 costal cartilages
insertion: slightly lateral to bicipital groove

Question 2

actions of the pec major

Answer 2

adducts the arm

medially rotates the arm

Question 3

pectoralis minor o-i

Answer 3

origin: ribs 3,4,and 5
insertion: coracoid process of scapula

Question 4

action of pec minor

Answer 4

downwardly rotates the shoulder girdle

Question 5

serratus anterior o-I:

Answer 5

origin: ribs 1-8
insertion: medial border of the scapula

Question 6

action of the serratus anterior

Answer 6

scapular protraction

Question 7

levator scapulae o-I:

Answer 7

origin: transverse process of C1-4
insertion: medial border of scapula

Question 8

where does the latissimus dorsi attatch on the humerus

Answer 8

on the bicipital groove

Question 9

actions of the lat dorsi

Answer 9

extend shoulder
adduct shoulder
medially rotates the arm

Question 10

deltoid o-I:

Answer 10

origin: clavicle, acromion, and scapula
insertion: deltoid tuberosity

Question 11

supraspinatus o-I:

Answer 11

origin: supraspinous fossa of scapula
insertion: greater tuberosity

Question 12

actions of the supraspinatus

Answer 12

abducts arm but mainly a stabilizer

Question 13

infraspinatus o-I:

Answer 13

origin: infraspinous fossa
insertion: greater tuberosity

Question 14

actions of the infraspinatus

Answer 14

externally rotates arm

Question 15

teres minor o-I:

Answer 15

origin: lateral border of scapula
insertion: greater tubercle

Question 16

actions of the teres minor

Answer 16

external rotation of arm

Question 17

teres major o-I:

Answer 17

origin: inferior angle
insertion: medial to the bicipital groove

Question 18

actions of teres major

Answer 18

internal rotation of arm

Question 19

subscapularis o-I:

Answer 19

origin: subscapular fossa
insertion: lesser tubercle

Question 20

actions of subscapularis

Answer 20

internal rotation