MSK 3.2 - Superficial Muscles of the Back Flashcards Preview

ESA 2 > MSK 3.2 - Superficial Muscles of the Back > Flashcards

Flashcards in MSK 3.2 - Superficial Muscles of the Back Deck (26):
1

Where does the trapezius originate? (3)

- Ligamentum Nuchae (Superior)
- Spinous processes C7-T5 (middle)
- Spinous processes T6-T12 (Inferior)

2

Where does the trapezius insert? (4)

- Superior fibres = Posterior border of lateral third of clavicle

- Middle fibres = Medial margin of acromion and superior border of posterior part of the scapula spine

- Inferior fibres = Tubercule at apex triangle at medial spine of scapula

3

Which nerves innervate the trapezius? What type nerve are these?

- Accessory nerve (motor)


(also has proprioceptor fibres from C3 and C4)

4

What are the actions of the trapezius? (3)

- Rotation and elevation of scapula when arm is abducted

- Retraction of scapula

- Pulls scapula inferiorly

5

What is the most common cause of damage to the accessory nerve? What happens as a result of this?

- Damage is latrogenic (due to a medical procedure)

- Loss of trapezius function

6

Where does the Latissimus Dorsi originate? (4)

- Spinous processes from T6-T12

- Iliac crest

- Thoracolumbar fascia

- Inferior three ribs

7

Where does the Latissimus Dorsi insert?

Intertubecular groove of the humerus

8

Which nerve innervates the Latissimus Dorsi?

Thoracodorsal nerve

9

What are the actions of the Latissimus Dorsi? (3)

- Extension
- Adduction
- Medial rotation

Of upper limb

10

Describe the shape and size of the Levator Scapulae

- Small
- Strap like

11

Describe the shape of the trapezius

- Broad
- Flat
- Triangular

12

What is the origin of levator scapulae?

Transverse processes of C1-C4 vertebrae

13

Where does levator scapulae insert?

The medial border of the scapula

14

What is the innervation of levator scapulae?

Dorsal scapular nerve

15

What is the arterial supply of levator scapulae?

Dorsal scapular artery

16

What are the actions of levator scapulae?

Elevation of the scapula

17

What is the origin of rhomboid major?

Spinous processes of T2-T5 vertebrae

18

Where does rhomboid major insert?

Medial border of the scapula (between the spine and inferior angle)

19

What is the innervation of rhomboid major?

Dorsal scapular nerve

20

What is the arterial supply of rhomboid major?

Dorsal scapular artery

21

What are the actions of rhomboid major?

Retraction and rotation of the scapula

22

What is the origin of rhomboid minor?

The spinous processes of C7-T1 vertebrae

23

Where does rhomboid minor insert?

Medial border of the scapula, at the level of the spine

24

What is the innervation of rhomboid minor?

Dorsal scapula nerve

25

What is the arterial supply of rhomboid minor?

Deep branch of the transverse cervical artery

26

What are the actions of rhomboid minor?

Retraction and rotation of the scapula

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