muscles

Question 1

intrinsic muscles

Answer 1

Deltoid
Coracobrachialis
Teres major
Rotator cuff group [SITS]
subscapularis
supraspinatus
infraspinatus
teres minor

Question 2

extrinsic muscles

Answer 2

latissimus dorsi
pectoralis major

Question 3

anterior muscles

Answer 3

Pectoralis major
Coracobrachialis
Subscapularis

Question 4

superior muscles

Answer 4

Deltoid
Supraspinatus

Question 5

posterior muscles

Answer 5

Latissimus dorsi
Teres major
Infraspinatus
Teres minor

Question 6

deltoid origin

Answer 6

comes off lateral border of clavicle

Question 7

pectorals major origin and insertion

Answer 7

originates on clavicular head [upper fibers] and sternal head [lower fibers]
inserts on lateral lip of bicipital groove

Question 8

deltoid muscle anterior fiber motion

Answer 8

abduction
flexion
horizontal adduction
diagonal adduction
internal rotation

Question 9

deltoid muscle middle fiber motion

Answer 9

abduction

Question 10

deltoid muscle posterior fiber motion

Answer 10

abduction
extension
horizontal abduction
diagonal abduction
external rotation

Question 11

coracobrachialis muscle motion

Answer 11

flexion
adduction
horizontal adduction
diagonal adduction

Question 12

pectoralis major muscle upper fiber motion

Answer 12

internal rotation
horizontal adduction
diagonal adduction
flexion
abduction (once arm is abducted 90 degrees, upper fibers assist in further abduction)
adduction (with arm below 90 degrees of abduction)

Question 13

pectoralis major muscle lower fiber motion

Answer 13

internal rotation
horizontal adduction
diagonal adduction
extension from flexed position
adduction

Question 14

pectoralis major muscle upper vs lower fiber motion

Answer 14

both: internal rotation, horizontal and diagonal adduction
upper: flexion, abduction, modified adduction
lower: extension from flexed, full adduction

Question 15

anteromedial attachment on humerus

Answer 15

Latissimus Dorsi
Teres Major
Subscapularis
Pectoralis Major

Question 16

attach posteriorly on greater tubercle

Answer 16

infraspinatus, teres minor

Question 17

latissimus dorsi muscle motion

Answer 17

adduction
extension
internal rotation
horizontal abduction

Question 18

teres major muscle motion

Answer 18

Extension, particularly from the flexed position to the posteriorly extended position
internal rotation
Adduction, particularly from the abducted position down to the side & toward midline of body

Question 19

SITS muscles

Answer 19

Supraspinatus
Infraspinatus
Teres Minor
Subscapularis

Question 20

Supraspinatus insertion

Answer 20

attach to greater tubercle from above (Abduct)

Question 21

Infraspinatus insertion

Answer 21

attach to greater tubercle posteriorly (Ext. Rot.)

Question 22

Teres Minor insertion

Answer 22

attach to greater tubercle posteriorly (Ext. Rot.)

Question 23

Subscapularis insertion

Answer 23

attach to lesser tubercle anterior (Int. Rot.)

Question 24

Subscapularis Muscle motion

Answer 24

internal rotation
adduction
extension

Question 25

Supraspinatus Muscle motion

Answer 25

abduction

Question 26

Infraspinatus Muscle motion

Answer 26

external rotation
horizontal abduction
extension

Question 27

Teres Minor Muscle motion

Answer 27

external rotation
horizontal abduction
extension
diagonal abduciton