Muscles Of The Shoulder And Arm Flashcards Preview

Anatomy Lab > Muscles Of The Shoulder And Arm > Flashcards

Flashcards in Muscles Of The Shoulder And Arm Deck (23):
1

Origin, insertion, and action of Trapezius

Origin: Posterior occipital bone, C7-T12
Insertion: Clavicle, acromion process, and spine of scapula
Action: Extends and abducts head, rotates and adducts scapula

2

Origin, insertion, and action of Deltoid

Origin: Clavicle, acromion process, spine of scapula
Insertion: Deltoid tuberosity of humerus
Action: Abducts arm; flexes, extends, medially, and laterally rotates arm

3

Origin, insertion, and action of Pectoralis major

Origin: Clavicle, sternum, cartilages of ribs 1-7
Insertion: Crest of greater tubercle of humerus
Action: Flexes, adducts, and medially rotates arm

4

Origin, insertion, and action of Latissimus dorsi

Origin: T7-S5, crest of ilium, ribs 10-12
Insertion: Intertubercular groove of humerus
Action: Extends, adducts, and medially rotates arm; draws shoulder inferiorly

5

Origin, insertion, and action of Biceps brachii

Origin:
1. Long head: superior margin of glenoid fossa
2. Short head: coracoid process of scapula
Insertion: Radial tuberosity
Action: Flexes arm, flexes forearm, supinates hand

6

Origin, insertion, and action of Triceps brachii

Origin: Infraglenoid tuberosity of scapula, lateral and posterior surface of humerus
Insertion: Olecranon process, tuberosity of ulna
Action: Extends and adducts arm, extends forearm

7

Name an action of the Pectoralis minor

Depresses glenoid cavity, raises ribs 3-5

8

Name an action of the Supraspinatus

Abducts arm, helps stabilize shoulder joint

9

Name an action of the Infraspinatus

Laterally rotates arm, stabilizes shoulder joint

10

Name an action of the Subscapularis

Medially rotates arm, stabilizes shoulder joint

11

Name an action of the Teres minor

Laterally rotates and adducts arm, stabilizes shoulder joint

12

Name an action of the Teres major

Extends, adducts, and medially rotates arm

13

Name an action of the Coracobrachialis

Flexes and adducts arm

14

Name an action of the Brachialis

Flexes forearm

15

Name an action of the Brachioradialis

Flexes forearm

16

Name the superficial muscles of the shoulder (5)

1. Trapezius
2. Deltoid
3. Pectoralis major
4. Pectoralis minor
5. Latissimus dorsi

17

Name the deep muscles of the shoulder (5)

1. Supraspinatus
2. Infraspinatus
3. Subscapularis
4. Teres minor
5. Teres major

18

Define an intrinsic muscle

A muscle contained within the region it moves

19

Define and extrinsic muscle

A muscle located outside of the region it moves

20

Define aponeurosis

A broad flat tendon

21

What is the purpose of a retinaculum?

Anchors tendons

22

Define fascia

Outer muscle wrapping

23

Name the muscles of the rotator cuff (4)

1. Supraspinatus
2. Infraspinatus
3. Teres minor
4. Subscapularis