Term
| Suboccipital Region - located deep to ____ and ____ muscles |
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Definition
| trapezius, splenius capitis |
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Term
| 4 Muscles of Suboccipital Region |
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Definition
- rectus capitus posterior major
- rectus capitus posterior minor
- obliquus capitis inferior
- obliquus capitis superior
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Term
| Rectus Capitis Posterior Major Origin |
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Definition
| spinous process of the axis |
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Term
Rectus Capitis Posterior Major Insertion
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Definition
| lateral part of the inferior nuchal line of the occipital bone |
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Term
Rectus Capitis Posterior Major Innervation
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Definition
| dorsal ramus of the suboccipital nerve of c1 |
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Term
Rectus Capitis Posterior Major Function
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Definition
| extends and rotates the head to the same side |
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Term
Rectus Capitis Posterior Minor Origin
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Definition
| tubercle on the posterior arch of the atlas |
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Term
Rectus Capitis Posterior Minor Insertion
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Definition
| medial part of the inferior nuchal line of the occipital bone |
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Term
Rectus Capitis Posterior Minor Innervation
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Definition
| dorsal primary ramus of the suboccipital nerve of c1 |
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Term
Rectus Capitis Posterior Minor Function
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Definition
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Term
| Obliquus Capitis Inferior Origin |
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Definition
| lateral surface of the spine of the axis |
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Term
| Obliquus Capitis Inferior Insertion |
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Definition
| transverse process of the atlas |
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Term
| Obliquus Capitis Inferior Innervation |
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Definition
| dorsal primary ramus of the suboccipital nerve |
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Term
| Obliquus Capitis Inferior Function |
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Definition
| rotates atlas and turns head to same side |
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Term
| Obliquus Capitis Superior Origin |
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Definition
| transverse process of the atlas |
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Term
Obliquus Capitis Superior Insertion
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Definition
| occipital bone between the superior and inferior nuchal lines |
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Term
Obliquus Capitis Superior Innervation
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Definition
| dorsal primary ramus of the suboccipital nerve |
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Term
Obliquus Capitis Superior Function
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Definition
| extends and bends the head laterally |
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Term
| Boundaries of the Suboccipital Triangle |
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Definition
- rectus capitis posterior major: superior and medial
- obliquus capitis superior: superior and lateral
- obliquus capitis inferior: inferior and lateral
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Term
| Floors of the Suboccipital Triangle |
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Definition
- posterior atlantooccipital membrane
- posterior arch of atlas
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Term
| Roof of Suboccipital Triangle |
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Definition
| semispinalis capitis muscle |
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Term
| Clinical Correlations of the Suboccipital Triangle (3) |
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Definition
- it contains the vertebral artery and suboccipital nerve
- these structures lie in a groove on the posterior arch of atlas
- the vertebral artery curves around atlas to enter foramen magnum. Reduced blood flow due to atherosclerosis may result in dizziness during prolonged head turning
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