MSK 3.2 - Superficial Muscles of the Back Flashcards

1
Q

Where does the trapezius originate? (3)

A
  • Ligamentum Nuchae (Superior)
  • Spinous processes C7-T5 (middle)
  • Spinous processes T6-T12 (Inferior)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where does the trapezius insert? (4)

A
  • 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
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

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

A
  • Accessory nerve (motor)

also has proprioceptor fibres from C3 and C4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are the actions of the trapezius? (3)

A
  • Rotation and elevation of scapula when arm is abducted
  • Retraction of scapula
  • Pulls scapula inferiorly
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

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

A
  • Damage is latrogenic (due to a medical procedure)

- Loss of trapezius function

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Where does the Latissimus Dorsi originate? (4)

A
  • Spinous processes from T6-T12
  • Iliac crest
  • Thoracolumbar fascia
  • Inferior three ribs
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Where does the Latissimus Dorsi insert?

A

Intertubecular groove of the humerus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which nerve innervates the Latissimus Dorsi?

A

Thoracodorsal nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

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

A
  • Extension
  • Adduction
  • Medial rotation

Of upper limb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the shape and size of the Levator Scapulae

A
  • Small

- Strap like

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the shape of the trapezius

A
  • Broad
  • Flat
  • Triangular
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the origin of levator scapulae?

A

Transverse processes of C1-C4 vertebrae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where does levator scapulae insert?

A

The medial border of the scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the innervation of levator scapulae?

A

Dorsal scapular nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the arterial supply of levator scapulae?

A

Dorsal scapular artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the actions of levator scapulae?

A

Elevation of the scapula

17
Q

What is the origin of rhomboid major?

A

Spinous processes of T2-T5 vertebrae

18
Q

Where does rhomboid major insert?

A

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

19
Q

What is the innervation of rhomboid major?

A

Dorsal scapular nerve

20
Q

What is the arterial supply of rhomboid major?

A

Dorsal scapular artery

21
Q

What are the actions of rhomboid major?

A

Retraction and rotation of the scapula

22
Q

What is the origin of rhomboid minor?

A

The spinous processes of C7-T1 vertebrae

23
Q

Where does rhomboid minor insert?

A

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

24
Q

What is the innervation of rhomboid minor?

A

Dorsal scapula nerve

25
Q

What is the arterial supply of rhomboid minor?

A

Deep branch of the transverse cervical artery

26
Q

What are the actions of rhomboid minor?

A

Retraction and rotation of the scapula