Intrinsic back muscles and suboccipital triangle (part 2)

Question 1

What is the insertion of Semispinalis capitis?

Answer 1

Occipital line between the superior and inferior nuchal lines

Question 2

What is the innervation of the Semispinalis capitis?

Answer 2

dorsal rami of spinal n

Question 3

What is the action of the Semispinalis capitis?

Answer 3

Bilateral: extends thoracic and cervical spine and head
Unilateral: bends head, cervical and thoracic spines to same side and rotates to opposite side

Question 4

What is the origin of Semispinalis cervices?

Answer 4

transverse process of T1-T6

Question 5

What is the insertion of Semispinalis cervicis?

Answer 5

spinous process of C2 to C5

Question 6

What is the innervation of Semispinalis cervicis?

Answer 6

dorsal rami of spinal nerve

Question 7

What is the action of semispinalis cervicis?

Answer 7

Bilateral: extends thoracic and cervical spine and head
Unilateral: bends head, cervical and thoracic spines to same side, rotates to opposite side

Question 8

What is the origin of Multifidus?

Answer 8

transverse and spinous process of C2 to sacrum

Question 9

What is the insertion of Multifidus

Answer 9

spinous and transverse process of C2 to sacrum

Question 10

What is the innervation of Multifidus

Answer 10

dorsal rami of spinal nerves

Question 11

What is the action of Multifidus?

Answer 11

Bilateral: extends spine
Unilateral: flexes spine to same side, rotates to opposite side

Question 12

What is the origin of the Semispinalis capitis?

Answer 12

transverse and articular processes of C4-T7

Question 13

What is the origin of Rotator breves?

Answer 13

Between transverse and spinous processes of adjacent vertebrae of T1-T12

Question 14

What is the insertion of the Rotator Brevis?

Answer 14

Between transverse and spinous processes of adjacent vertebra of T1-T12

Question 15

What is the innervation of Rotator Brevis?

Answer 15

Dorsal rami of spinal nerve

Question 16

What is the action of Rotator Breves

Answer 16

Bilateral: extends thoracic spine
Unilateral: rotates spine to opposite side

Question 17

What is the origin of Rotator longus?

Answer 17

between transverse and spinous processes of T1-T12, skipping one vertebra

Question 18

What is the insertion of Rotator longus?

Answer 18

between transverse and spinous processes of T1-T12, skipping one vertebra

Question 19

What is the innervation of Rotator longus?

Answer 19

Dorsal rami of spinal nerve

Question 20

What is the action of Rotator longus?

Answer 20

Bilateral: extends thoracic spine
Unilateral: rotates spine to opposite side

Question 21

What is the origin of the Oblique capitis superior?

Answer 21

transverse process of C1

Question 22

What is the insertion of Oblique capitis superior?

Answer 22

Occipital bone (inferior nuchal line, middle third, above rectus capitis posterior major)

Question 23

What is the innervation of the Oblique capitis superior?

Answer 23

C1 dorsal rami of suboccipital nerve

Question 24

What is the action of the Oblique capitis superior?

Answer 24

Bilateral: extends head
Unilateral: tilts head to the same side, rotates head to opposite side

Question 25

What is the origin of Oblique capitis inferior?

Answer 25

spinous process of C2

Question 26

What is the insertion of Oblique capitis inferior?

Answer 26

transverse process of C1

Question 27

What is the innervation of Oblique capitis inferior?

Answer 27

C1 dorsal rami of suboccipital nerve

Question 28

What is the action of Oblique capitis inferior?

Answer 28

Bilateral: extends head Unilateral: rotates head to same side

Question 29

What is the origin of Rectus capitis posterior major?

Answer 29

spinous process of C2

Question 30

What is the insertion of Rectus capitis posterior major?

Answer 30

occipital bone (superior nuchal line, middle third)

Question 31

What is the innervation of Rectus capitis posterior major?

Answer 31

C1 posterior rami of subocciptal nerve

Question 32

What is the action of Rectur capitis posterior major?

Answer 32

Bilateral: extends head Unilateral: rotates head to the same side

Question 33

What is the origin of Rectus capitis posterior minor?

Answer 33

posterior tubercle of C1

Question 34

What is the insertion of Rectus capitis posterior minor?

Answer 34

occipital bone ( inferior nuchal line, inner third)

Question 35

What is the innervation of Rectus capitis posterior minor?

Answer 35

C1 posterior rami of suboccipital nerve)

Question 36

What is the action of the Rectus capitis posterior minor?

Answer 36

Bilateral: extends head Unilateral: rotates head to same side