Lecture 9- Suboccipital Muscles Flashcards Preview

CHI282 - Human Anatomy 2 > Lecture 9- Suboccipital Muscles > Flashcards

Flashcards in Lecture 9- Suboccipital Muscles Deck (24):
0

Rectus Capitis Posterior Major
Origin
Insertions

Spinous process of axis (C2)
Lateral inferior nuchal line

1

Rectus Capitis Posterior Major
Innervation

Suboccipital nerve (C1 dorsal rami)

2

Rectus Capitis Posterior Major
Main Action?

Bilateral: Extends head at atlanto-occipital joint
Unilateral: Rotates head to same side

3

Extend the head at the atlanto-occipital joint

•Rectus Capitis posterior major
•Rectus Capitis posterior minor
•Obliquus capitis superior

4

Rectus Capitis Posterior Minor
Origin
Insertion

Tubercle of posterior arch of atlas (C1)
Median inferior nuchal line

5

Rectus Capitis Posterior Minor
Innervation
Main action

Suboccipital nerve ( dorsal rami of C1)
Bilaterally: extends head at the Atlanta-occipital joint

6

Obliquus Capitis Superior:
Origin
insertion



Atlas transverse process
Occipital bone

7

Obliquus Capitis Superior
Innervation
Main actions

Suboccipital nerve
(C1 dorsal rami)
Bilateral: Extends head at atlanto-occipital joint
Unilateral: Bends head laterally

8

Obliquus Capitis Inferior:
Origin
Insertion

Spinous process or axis (C2)
Transverse process of atlas (C1)

9

Obliquus Capitis Inferior
Innervation
Main Action

Suboccipital nerve ( dorsal rami of C1)
Rotates atlas to turn face to other side

10

Longus capitis
Superior attachment
Inferior attachment



Basilar part of occipital bone
Anterior tubercles of C3-C6 transverse processes

11

Longus Capitis
Innervation
Main action

Anterior rami of C1-C3 spinal nerves
Bilateral: Flexes head at atlanto-occipital joint
Unilateral: Tilts and slightly rotates head to same side.

12

Longus colli:
Origin
Insertion

Anterior tubercle of C1; bodies of C1-C3 and transverse processes of C3-C6.
Inferior attachment
Bodies of C5-T3; transverse processes of C3-C5

13

Longus Colli:
Innervation
Main action


Innervation
Anterior rami of C2-C6 spinal nerves

Main actions
Bilateral: Flexes cervical spine (anterior bending of C2-C7)
Unilateral: Tilts and slightly rotates head to same side.

14

Rectus Capitis anterior:
Origin
Insertion

Base of cranium, just anterior to occipital condyle
Inferior attachment
Anterior surface of lateral mass of C1

15

Rectus Capitis Lateralis:
Origin
Insertion

Superior attachment
Jugular process of occipital bone
Inferior attachment
Transverse process of C1

16

Rectus Capitis Lateralis
Innervation
Main action


Innervation
C1 (anterior ramus)
Main actions
Bilateral: Flexes head at atlanto-occipital joint
Unilateral: Lateral flexion at atlanto-occipital joint

17

Also part of the posterior triangle of the neck:

•Posterior scalene
•Middle scalene
•Anterior scalene

Common main action of this group => ....... ....... .......

Flex neck laterally

18

Anterior scalene:
Origin
Insertion

Anterior tubercles of transverse processes of
C3-C6

First rib

19

Anterior scalene:
Innervation
Main action


C5-C7

Main actions
Flexes neck laterally;
Elevates first rib

20

Middle scalene:
Origin
Insertion

Posterior tubercles of transverse processes of
C2-C7

First rib

21

Middle scalene:
Innervation
Main action


C3-C8

Main actions
Flexes neck laterally;
Elevates first rib

22

Posterior scalene:
Origin
Insertion

Posterior tubercles of transverse processes of
C4-C6

Second rib

23

Posterior scalene:
Innervation
Main action


C6-C8

Main actions
Flexes neck laterally;
Elevates second rib