Suboccipital Muscles Flashcards
What does Suboccipital Muscles refer to?
four muscles situated underneath the occipital bone which are all innervated by the suboccipital nerve.
What is the general area the Suboccipital muscles are located in?
Suboccipital compartment of the neck, deep to the sternocleidomastoid, trapezius, splenius and semispinalis muscles.
What is the collective function of the suboccipital muscles?
Extend and rotate the head
What is the Rectus Capitis Posterior Major?
Larger rectus capitis muscles located laterally to the rectus capitis posterior minor
What is the origin of the Rectus Capitis Posterior Major muscle?
C2 vertebra (the axis)
Where does the Rectus Capitis Posterior Major muscle insert?
Inferior nuchal line of the occipital bone
What is the function of the Rectus Capitis Posterior Major muscle?
Extension and rotation of the head
What is the Rectus Capitis Posterior Minor muscle?
Most medial muscle of the Suboccipital muscle which contains connective tissue between this muscle and dura matter
What is the origin of the Rectus Capitis Posterior Minor muscle?
Posterior tubercle of the C1 vertebra (the atlas)
What is the insertion of the Rectus Capitis Posterior Minor muscle?
Medial part of the inferior nuchal line of the occipital bone
What is the action of the Rectus Capitis Posterior Minor muscle?
Extension of the head
What is the Obliquus Capitis Inferior Muscle?
Most inferior Suboccipital muscle, which is also the only muscle that does not have attachments to the cranium
What is the origin of the Obliquus Capitis Inferior Muscle?
Spinous process of the C2 vertebra
What is the Insertion point of the Obliquus Capitis Inferior Muscle?
Transverse process of the C1 Vertebra
What is the action of the Obliquus Capitis Inferior muscle?
Extension and Rotation of the head