2.2.1. Posterior Back/Neck Flashcards Preview

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Flashcards in 2.2.1. Posterior Back/Neck Deck (23)
1

What are the muscles that make up the boundaries of the suboccipital triangle?

1) Obliquus capitis superior (superior oblique) 2) Obliquus capitis inferior (inferior oblique) 3) Rectus capitis posterior major And this one is also there, but technically not part of the triangle: 4) Rectus capitis posterior minor

2

What nerve usually emerges from WITHIN the borders of the suboccipital triangle? What does it do?

Suboccipital nerve (dorsal ramus of C1); supplies the muscles of the suboccipital triangle

3

What nerve usually emerges INFERIOR to the suboccipital triangle? What does it do?

Greater occipital nerve (dorsal ramus of C2); provides sensation (cutaneous innvervation) to the scalp

4

Which bony landmark will lead you to the rectus capitis posterior major and the inferior oblique?

The posterior tubercle (spinous process) of C2 (the axis)

5

What is the origin and insertion of the Rectus Capitis Posterior Major?

Origin: Posterior tubercle (spinous process) of C2 (axis) Insertion: Lateral part of the inferior nuchal line

6

What is the origin and insertion of the Rectus Capitis Posterior Minor?

Origin: Posterior tubercle of the posterior arch of C1 (atlas) Insertion: Medial part of the inferior nuchal line

7

What is the origin and insertion of the Obliquus capitis inferior?

Origin: Posterior tubercle of the posterior arch of C2 (axis) Insertion: Transverse process of C1 (atlas)

8

What is the origin and insertion of Obliquus capitis superior?

Origin: Transverse process of C1 (atlas) Insertion: Occipital bone in between superior and inferior nuchal lines

9

Which nerve innervates the trapezius?

Spinal Accessory nerve (CN XI)

10

Which nerve innervates the sternocleidomastoid?

Spinal Accessory nerve (CN XI)

11

Which nerve innervates the splenius?

Posterior ramus of C3 and C4

12

List the three muscles COVER the suboccipital region (from superficial to deep).

Trapezius, Splenius, and Semispinalis

13

Identify the landmark.

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Foramen magnum

14

Identify the vertebrae and the numbered landmarks.

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C1 (Atlas)

1. Posterior arch

2. Posterior tubercle of arch

3. Transverse process

4. Foramen transversarium

5. Groove for vertebral artery

15

Identify the vertebrae and the numbered landmarks.

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C2 (axis)

1. Dens (odontoid process)

2. Spine and bifid spinous process

16

What is the action of the splenius capitis?

Extends and rotates the cervical spine

17

What is the action of the semispinalis capitis?

Rotate, extend, and bend the head

18

What is the action of the obliquus capitis inferior?

Ipsilateral rotation of the atlanto-axial joint

19

Define ipsilateral action

Action is on the same side as the muscle

20

What is the action of the obliquus capitis superior?

Extension of the atlanto-occipital joints

21

What is the action of the rectus capitis posterior major and rectus capitis posterior minor?

Ipsilateral rotation of the atlanto-axial joint

22

Identify the labeled muscles. What is the name of the structure that they form?

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1. Obliquus capitis inferior 

2. Obliquus capitis superior

3. Rectus capitis posterior major

4. Rectus capitis posterior minor

The first three muscles make up the suboccipital triangle.

23

Which artery emerges through the suboccipital triangle?

What artery does it branch off of?

Vertebral artery, branches off of the subclavian artery