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Spine Anatomy

Os & Is: SCM-Obliqus Capitus Inferior

QuestionAnswer
Sternocleidomastoid PA: Mastoid process and lateral half of superior nuchal line.
Sternocleidomastoid DA: Sternal head: Manubrium of sternum, Clavicular head: Medial third of clavicle.
Sternocleidomastoid N: CN XI: Spinal accessory n, and VR C2, C3.
Sternocleidomastoid A: Bilaterally: Flexes the neck, Unilaterally: Ipsilateral lateral neck flexion and contralateral rotation.
Scalenus Anterior SA: TP C4-C6.
Scalenus Anterior IA: Scalene tubercle of 1st rib.
Scalenus Anterior N: C VR.
Scalenus Anterior A: neck flexion, ipsilateral lateral flexion, contralateral rotation; elevates 1st rib during forced inspiration.
Scalenus Medius SA: TP C4-C6.
Scalenus Medius IA: 1st rib, posterior to groove for subclavian artery.
Scalenus Medius N: C VR.
Scalenus Medius A: Laterally flexes neck; elevates 1st rib during forced inspiration.
Scalenus Posterior SA: TP C4-C6.
Scalenus Posterior IA: 2nd rib.
Scalenus Posterior N: C VR.
Scalenus Posterior A: Laterally flexes neck; elevates 2nd rib during forced inspiration.
Rectus Capitus Posterior Major O: SP C2.
Rectus Capitus Posterior Major I: Lateral aspect of the inferior nuchal line.
Rectus Capitus Posterior Major N: DR C1 (Suboccipital n.).
Rectus Capitus Posterior Major A: Extends head, ipsilateral rotation.
Rectus Capitus Posterior Minor O: Posterior tubercle of C1.
Rectus Capitus Posterior Minor I: Medial aspect of inferior nuchal line.
Rectus Capitus Posterior Minor N: DR C1 (Suboccipital n.).
Rectus Capitus Posterior Minor A: Extends head, ipsilateral rotation.
Obliqus Capitus Superior O: TP C1.
Obliqus Capitus Superior I: Between superior and inferior nuchal lines.
Obliqus Capitus Superior N: DR C1 (Suboccipital n.).
Obliqus Capitus Superior A: Extension and lateral flexion of head.
Obliqus Capitus Inferior O: SP C2.
Obliqus Capitus Inferior I: TP C1.
Obliqus Capitus Inferior N: DR C1 (Suboccipital n.).
Obliqus Capitus Inferior A: Rotates atlas, turning head ipsilaterally.
Created by: txst spr 2009