Suboccipital Musculature Flashcards Preview

Spinal Anatomy I - Exam 3 > Suboccipital Musculature > Flashcards

Flashcards in Suboccipital Musculature Deck (20):
1

What muscles are included in the suboccipital muscle group?

- rectus capitis posterior major
- rectus capitis posterior minor
- obliquus capitis inferior
- obliquus capitis superior

2

Which suboccipital muscle lacks an attachment to the skull?

obliquus capitis inferior

3

Which nerve will innervate all suboccipital muscles?

the dorsal ramus of C1, the suboccipital nerve

4

What is the origin of the rectus capitis posterior major?

the spinous tubercle of C2

5

What is the insertion of the rectus capitis posterior major?

inferior nuchal line laterally

6

Contraction of rectus capitis posterior major will result in what movements?

- turns the face to the side
- bilaterally acts to extend the head

7

What is the origin of the rectus capitis posterior minor?

the posterior tubercle of the posterior arch of C1

8

What is the insertion of the rectus capitis posterior minor?

inferior nuchal line medially

9

Contraction of rectus capitis posterior minor will result in what movements?

extends the head

10

What is the origin of the obliquus capitis inferior?

C2 spinous process and lamina

11

What is the insertion of the obliquus capitis inferior?

transverse process of C1

12

Contraction of obliquus capitis inferior will result in what movements?

turns the face to the side

13

What is the origin of the obliquus capitis superior?

the posterior tubercle of the transverse process of C1

14

What is the insertion of the obliquus capitis superior?

between superior nuchal line and inferior nuchal line

15

Contraction of obliquus capitis superior will result in what movements?

- lateral flexion and lateral bending of the head
- bilaterally acts to extend the head

16

An increase in the density of muscle spindles is most apparent in which suboccipital muscle?

obliquus capitis inferior

17

Suboccipital muscle feedback relays to what additional locations in the brain?

- extraocular nuclei of origin
- primary visual cortex
- vestibular nuclei

18

What is the result of communication between suboccipital muscles, visual centers, and vestibular centers?

coordination of head and eye position

19

What is the proposed function of the suboccipital muscle group?

postural stabilizers of the atlanto-occipital and atlanto-axial joints

20

Which suboccipital muscles are known to attach to dura mater?

- rectus capitis posterior major
- rectus capitis posterior minor
- obliquus capitis inferior

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