Podcast
Questions and Answers
Which muscle is responsible for ipsilateral rotation of the head?
Which muscle is responsible for ipsilateral rotation of the head?
Which action is NOT performed by the Rectus Capitis Posterior Minor?
Which action is NOT performed by the Rectus Capitis Posterior Minor?
What is a common action for both the Rectus Capitis Posterior Major and the Rectus Capitis Posterior Minor?
What is a common action for both the Rectus Capitis Posterior Major and the Rectus Capitis Posterior Minor?
Which of the following muscles assists primarily in sidebending without promoting ipsilateral rotation?
Which of the following muscles assists primarily in sidebending without promoting ipsilateral rotation?
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Which nerve root is associated with the Rectus Capitis Posterior Minor?
Which nerve root is associated with the Rectus Capitis Posterior Minor?
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What is the primary nerve supply for the suboccipital muscles?
What is the primary nerve supply for the suboccipital muscles?
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Which action is specifically associated with the Obliquus Capitis Inferior?
Which action is specifically associated with the Obliquus Capitis Inferior?
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Which of the following correctly describes the Rectus Capitis Posterior Major?
Which of the following correctly describes the Rectus Capitis Posterior Major?
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Which muscle contributes to both extension and sidebending of the head and is positioned above the Obliquus Capitis Inferior?
Which muscle contributes to both extension and sidebending of the head and is positioned above the Obliquus Capitis Inferior?
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What is the common root associated with all the suboccipital muscles?
What is the common root associated with all the suboccipital muscles?
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Study Notes
Suboccipital Muscle Structure
- Comprised of four main muscles: rectus capitis posterior minor, rectus capitis posterior major, obliquus capitis superior, obliquus capitis inferior.
- Located beneath the occipital bone, close to the cervical spine.
Rectus Capitis Posterior Minor
- Small muscle at the back of the skull.
- Nerve supply: posterior ramus of C1 (suboccipital nerve).
- Root: C1 nerve root.
- Actions: extension, side bending of the head, and ipsilateral rotation.
Rectus Capitis Posterior Major
- Larger than the minor and positioned adjacent to it.
- Nerve supply: posterior ramus of C1 (suboccipital nerve).
- Root: C1 nerve root.
- Actions: extension, side bending of the head, and ipsilateral rotation.
Obliquus Capitis Superior
- Positioned above the obliquus capitis inferior; extends from the upper cervical spine to the occipital bone.
- Nerve supply: posterior ramus of C1 (suboccipital nerve).
- Root: C1 nerve root.
- Actions: extension and side bending of the head.
Obliquus Capitis Inferior
- Located below the obliquus capitis superior; connects the atlas (C1) to the axis (C2).
- Nerve supply: posterior ramus of C1 (suboccipital nerve).
- Root: C1 nerve root.
- Actions: ipsilateral rotation of the head.
Suboccipital Muscle Structure
- Composed of four primary muscles: rectus capitis posterior minor, rectus capitis posterior major, obliquus capitis superior, and obliquus capitis inferior.
- Located beneath the occipital bone, adjacent to the cervical spine.
Rectus Capitis Posterior Minor
- Small muscle located at the back of the skull.
- Nerve supply provided by the posterior ramus of C1 (suboccipital nerve).
- Originates from the C1 nerve root.
- Functions include extension, side bending of the head, and ipsilateral rotation.
Rectus Capitis Posterior Major
- Larger muscle compared to the minor, positioned adjacent to it.
- Nerve supply from the posterior ramus of C1 (suboccipital nerve).
- Originates from the C1 nerve root.
- Actions include extension, side bending of the head, and ipsilateral rotation.
Obliquus Capitis Superior
- Muscle situated above the obliquus capitis inferior, connecting the upper cervical spine to the occipital bone.
- Supplied by the posterior ramus of C1 (suboccipital nerve).
- Also arises from the C1 nerve root.
- Responsible for extension and side bending of the head.
Obliquus Capitis Inferior
- Positioned below the obliquus capitis superior, linking the atlas (C1) to the axis (C2).
- Nerve supply provided by the posterior ramus of C1 (suboccipital nerve).
- Originates from the C1 nerve root.
- Primarily facilitates ipsilateral rotation of the head.
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Description
Test your knowledge of the suboccipital muscles, including their structure, locations, and functions. This quiz covers the four main muscles: rectus capitis posterior minor, rectus capitis posterior major, obliquus capitis superior, and obliquus capitis inferior, along with their nerve supply and actions.
