Back Muscles

Question 0

Latissimus dorsi Origin

Answer 0

O: spinous processes of lower thoracic and lumbar vertebrae, iliac crest, sacrum

Question 1

Trapezius Origin

Answer 1

O: External occipital protuberance, superior nuchal line, ligamentum nuchae, spinous processes of c7 and thoracic vertebrae

Question 2

Levator scapulae Origin

Answer 2

O: Transverse processes of upper cervical vertebrae

Question 3

Rhomboid major and minor Origin

Answer 3

O: Spinous processes of lower cervical and upper thoracic vertebrae

Question 4

Splenius capitis and cervicis Origin

Answer 4

O: Ligamentum nuchae, spinous processes of C7 and upper thoracic vertebrae

Question 5

Erector Spinae Origin

Answer 5

O: Sacrum, iliac crest, ribs, spinous and transverse processes of vertebrae

Question 6

Semispinalis capitis Origin

Answer 6

O: Transverse processes of lower cervical and upper thoracic vertebrae

Question 7

Trapezius Insertion

Answer 7

I: lateral 1/3 of clavicle, acromion, spine of scapula

Question 8

Trapezius Innervation

Answer 8

I: Accessory nerve

Question 9

Trapezius Action

Answer 9

A: Superior fibers elevate and laterally rotate scapula; midline fibers retract scapula, inferior fibers depress and laterally rotate scapula

Question 10

Latissimus Dorsi Insertion

Answer 10

I: Intertubercular groove of humerus

Question 11

Latissimus Dorsi Innervation

Answer 11

I: Thoracodorsal nerve

Question 12

Latissimus Dorsi Action

Answer 12

A: Extends, adducts and medially rotates the humerus

Question 13

Levator Scapulae Insertion

Answer 13

I: Superior angle of scapula

Question 14

Levator Scapulae Innervation

Answer 14

I: Dorsal scapular nerve

Question 15

Levator Scapulae Action

Answer 15

A: Elevates scapula

Question 16

Rhomboid Major and Minor Insertion

Answer 16

I: Medial border of scapula

- Rhomboid minor superior to the spine
- Rhomboid major inferior to the spine

Question 17

Rhomboid Major and Minor Innervation

Answer 17

I: Dorsal scapular nerve

Question 18

Rhomboid Major and Minor Action

Answer 18

A: Retracts and medially rotates scapula

Question 19

Splenius Capitis and Cervicis Insertion

Answer 19

I: Capitis - mastoid process and superior nuchal line

Cervicis - transverse processes of upper cervical vertebrae

Question 20

Splenius Capitis and Cervicis Innervation

Answer 20

I: Dorsal rami of spinal nerves

Question 21

Splenius Capitis and Cervicis Action

Answer 21

A: Bilaterally - extend the head and neck

Unilaterally - rotate the head to one side.

Question 22

Erector Spinae Insertion

Answer 22

I: Spinous and transverse processes of vertebrae, ribs, skull

Question 23

Erector Spinae Innervation

Answer 23

I: Dorsal rami of spinal nerves

Question 24

Erecter spinae Action

Answer 24

A: Bilaterally - extend head and trunk
Unilaterally - bend trunk laterally
Important in controlling flexion

Question 25

Semispinalis capitis Insertion

Answer 25

I: Occipital bone near nuchal lines

Question 26

Semispinalis capitis Innervation

Answer 26

I: Dorsal rami of spinal nerves

Question 27

Ereector Spinae Action

Answer 27

A: Bilaterally - extend head

Unilaterally - rotate head to one side