Shoulder - origin, insertions and actions

Question 1

what are the 4 actions that are in the “horizontal” category

Answer 1

horizontal internal rotation

horizontal external rotation

horizontal abduction

horizontal adduction

Question 2

what are the 6 actions that are in the “normal” category

Answer 2

flexion

extension

internal rotation

external rotation

adduction

abduction

Question 3

what are the 4 actions that are in the “scapulothoracic” category

Answer 3

elevation

depression

protraction

retraction

Question 4

what action group is rotator cuff - subscapularis in?

Answer 4

horizontal group and normal group

Question 5

what action group is rotator cuff - supraspinatus in?

Answer 5

normal group

Question 6

what action group is rotator cuff - infraspinatus and teres major in?

Answer 6

normal group and horizontal group

Question 7

what action group is deltoid in? - 3 different fibres

Answer 7

anterior - normal and horizontal group

posterior - normal group

lateral - normal group

Question 8

what action group is biceps brachii in?

Answer 8

normal group

Question 9

what action group is triceps brachii in?

Answer 9

normal group

Question 10

what action group is pectorals major in?

Answer 10

normal group and horizontal group

Question 11

what action group is pectorals minor in?

Answer 11

scapulothoracic group

Question 12

what action group is coracobrachialis in?

Answer 12

normal group and horizontal group

Question 13

what action group is teres major in?

Answer 13

normal group

Question 14

what is the origin of rotator cuff - subscapularis?

Answer 14

subcapular fossa

Question 15

what is the insertion of rotator cuff - subscapularis?

Answer 15

lesser tubercle of humerus

Question 16

what is the action of rotator cuff - subscapularis?

Answer 16

internal rotation and horizontal internal rotation

Question 17

what is the origin of rotator cuff - supraspinatus?

Answer 17

supraspinatus fossa

Question 18

what is the insertion of rotator cuff - supraspinatus?

Answer 18

greater trochanter of humerus

Question 19

what is the action of rotator cuff - supraspinatus?

Answer 19

assisted deltoid in abduction of humerus

Question 20

what is the origin of rotator cuff - infraspinatus and teres major?

Answer 20

infraspinatus - infraspinatus fossa

teres - lateral border of scapula

Question 21

what is the insertion of rotator cuff - infraspinatus and teres major?

Answer 21

infra - greater tubercle of humerus

teres - greater tuberosity of humerus

Question 22

what is the action of rotator cuff - infraspinatus and teres major?

Answer 22

external and horizontal external rotation of humerus

Question 23

what is the origin of the deltoid?

(anterior, lateral and posterior fibres)

Answer 23

anterior fibres - lateral 3rd clavicle
lateral fibres - acromion
posterior fibres - spine of scapular

Question 24

what is the insertion of the deltoid?

Answer 24

deltoid tuberosity

Question 25

what is the action of the deltoid? (anterior, lateral and posterior fibres)

Answer 25

anterior fibres - flexion and internal rotation lateral fibres - abduction of humerus posterior fibres - extension and lateral rotation of humerus

Question 26

what is the origin of biceps brachii?

Answer 26

short head - coracoid process long head - supraglenoid tubercle

Question 27

what is the insertion of biceps brachii?

Answer 27

radial tuberosity and long head bicipital aponeurosis

Question 28

what is the action of biceps brachii?

Answer 28

supination, elbow flexion, shoulder flexion

Question 29

what is the origin of triceps brachii? long head, lateral head, medial head

Answer 29

long head - infraglenoid tuberosity lateral head - posterior side of humerus medial head - posterior side of humerus

Question 30

what is the insertion of biceps brachii?

Answer 30

all olecranon process

Question 31

what is the action of biceps brachii?

Answer 31

elbow extension and shoulder extension