Muscles That Move The Humerus

Front 1

Humeral abduction

Back 1

1. Deltoid

2. Supraspinatus

Front 2

Name 6 movements that the humerus does

Back 2

1. Medial rotation

2. Lateral rotation

3. Abduction

4. Adduction

5. Flexion

6. Extension

Front 3

What movement does the following muscles do:

- Latissimus dorsi

- Teres major

- Pectoralis major

- Deltoid (posterior fibres)

Back 3

Extension

Front 4

What movement does the middle deltoid and supraspinatus do?

Back 4

Humeral abduction

Front 5

Name the 3 origins of the deltoid muscle

Back 5

1. scapula- lateral spine

2. acromion process- lateral border

3. clavicle- superior 1/3

Front 6

Name the 3 insertions of the muscles at the intertubercular grove

Back 6

1. Lateral lip- pectoralis major

2. Floor- latissimus dorsi

3. Medial lip- teres major

Front 7

which muscles laterally rotate the humerus

Back 7

1. Deltoid (posterior fibres)

2. Infraspinatus

3. Teres minor

Front 8

Name the actions of the deltoid muscle

Back 8

1. Anterior fibres- flex and medially rotate

2. Middle fibres- abduct the humerus

3. Posterior- extend and laterally rotate

Front 9

Muscles that medially rotate the humerus?

Back 9

1. Deltoid (anterior fibres)

2. Subscapularis

3. Latissimus dorsi

4. Teres major

5. Pectoralis major

Front 10

Adduction of humerus

Back 10

1. Teres major (Towards)

2. Latissimus dorsi (Line)

3. Pectoralis major

4. Coracobrachialis

Front 11

Which muscle is a synergist of humerus adduction

Back 11

Coracorachialis

Front 12

What are the two movements that the humerus and shoulder girdle have in common?

Back 12

1. Lateral rotation

2. Medial rotation

Front 13

Muscles that flex the humerus

Back 13

1. Deltoid (anterior fibres)

2. Pectoralis major

3. Biceps brachii

4. Coracobrachialis

Front 14

Muscles that extend the humerus

Back 14

1. Deltoid (posterior fibres)

2. Latissimus dorsi

3. Pectoralis major

4. Teres major

Front 15

Deltoid is _____ and therefore is very powerful

Back 15

Multipennate

Front 16

Which muscle lies between the scapula and thoracic cage?

Back 16

subscapularis

Front 17

Supraspinatus lies in the ________fossa,

deep/superficial to the trapezius?

Back 17

supraspinous fossa

deep to the trapezius

Front 18

Teres major is thick/thin and flat, forming the ______wall of the axilla

Back 18

thick and flat

posterior

Front 19

teres minor is thick/thin and ______, difficult to separate from the _______ muscle

Back 19

thin and cylindrical

hard to separate from infraspinatus

Front 20

Coracobrachialis is a ______muscle in the _____

Back 20

Small muscle in the arm

Front 21

Where does the deltoid muscle insert?

Back 21

Deltoid tuberosity of the humerus

Front 22

Which muscle's origin is at the inferior angle of the scapula?

Back 22

teres major

Front 23

Where does latissimus dorsi insert?

Back 23

floor of intertubercular groove/sulcus

Front 24

Where is the origin(s) of latissimus dorsi?

Back 24

1. T7 - L5 spinous processes

2. Iliac and sacral crests

3. Lower 4 ribs (outer surface)

4. Scapula - Inferior angle

Front 25

What are the origins of the pectoralis major?

Back 25

1. Clavicular- medial 1/2

2. Sternocostal- lateral border of sternum from ribs 1-6

Front 26

Insertion of the coracobrachialis?

Back 26

Medial surface, middle 1/3 of the humerus