Muscles of the Back

Question 0

Trapezius Insertion

Answer 0

Lateral 1/3 of clavicle
acromion
spine of scapula

Question 1

Trapezius Origin

Answer 1

External occipital protuberance
superior nuchal line
Ligamentum nuchae
Spinous processes of C7 and thoracic verebrae

Question 2

Trapezius Innvervation

Answer 2

CN 11, Accessory nerve

Question 3

Trapezius Action

Answer 3

Superior fibers = elevate and laterally rotate scapula
Middle fibers = retract scapula
Inferior fibers = depress and laterally rotate scapula

Question 4

Latissimus Dorsi Origin

Answer 4

Spinous processes of lower thoracic and lumbar vertebrae
iliac crest
Sacrum

Question 5

Latissimus Dorsi Insertion

Answer 5

Intertubercular groove of humerus

Question 6

Latissimus Dorsi Innervation

Answer 6

Thoracodorsal nerve

Question 7

Latissimus Dorsi Action

Answer 7

Extends, adducts and medially rotates humerus

Question 8

Levator scapulae Origin

Answer 8

Transverse processes of upper cervical vertebrae

Question 9

Levator scapulae Insertion

Answer 9

Superior angle of scapula

Question 10

Levator scapulae Innervation

Answer 10

Dorsal scapular nerve

Question 11

Levator scapulae Action

Answer 11

Elevates scapula

Question 12

Rhomboid Major and Minor Origin

Answer 12

Spinous processes of lower C and Upper T vertebrae

Question 13

Rhomboid Major and Minor Insertion

Answer 13

Medial border of scapula
R. Minor superior to spin
R. Major inferior to spine

Question 14

Rhomboid Major and Minor Innervation

Answer 14

Dorsal scapular nerve

Question 15

Rhomboid Major and Minor Action

Answer 15

Retracts and medially rotates scapula

Question 16

Splenius capitis and cervicis Origin

Answer 16

Ligamentum nuchae

spinous process of C7 through Upper T vertebrae

Question 17

Splenius capitis and cervicis Insertion

Answer 17

Capitis: mastoid process and superior nuchal line

Cervicis: Transverse processes of upper cervical vertebrae

Question 18

Splenius capitis and cervicis Innervation

Answer 18

Dorsal Rami of Spinal Nerves

Question 19

Splenius capitis and cervicis Action

Answer 19

Bilaterally = extend head and neck
Unilaterally = rotate head to one side

Question 20

Erector Spinae Origin

Answer 20

Sacrum
Iliac crest
ribsd
spinous and transverse processes of vertebrae

Question 21

Erector Spinae Insertion

Answer 21

Spinous and transverse processes of vertebrae
Ribs
Skull

Question 22

Erector Spinae Innervation

Answer 22

Dorsal Rami of spinal nerves

Question 23

Erector Spinae Action

Answer 23

Bilaterally = extend head and trunk
Unilaterally = bend trunk laterally
**controls flexion

Question 24

Semispinalis capitis Origin

Answer 24

Transverse processes of lower C and upper T vertebrae

Question 25

Semispinalis capitis insertion

Answer 25

Occipital bone near nuchal lines

Question 26

Semispinalis capitis innervation

Answer 26

Dorsal rami of spinal nerves

Question 27

Semispinalis capitis Action

Answer 27

Bilaterally = extend head
Unilaterally = rotates head to one side