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Muscle Origin Insertion Action Nerve
Lateral vertebral:
Anterior scalene Transverse processes of CV3-CV6 Scalene tubercle on first rib Elevates first rib; Lateral flexion of neck Lower cervical (C5-C8)
Middle scalene Transverse processes of CV2-CV7 Upper surface of first rib Elevates first rib; Lateral flexion of neck Lower cervical (C5-C8)
Posterior scalene Transverse processes of CV4-CV6 Outer surface of second rib Elevates second rib; Lateral flexion of neck Lower cervical (C6-C8)
Anterior vertebral:
Longus capitus Transverse processes of CV3-CV4 Basilar part of occipital bone Flexes & rotates head C1-C4
Longus colli (L. cervicis) Transverse processes & bodies of CV3-TV3 Anterior tubercle of atlas; bodies of CV2-CV4; transverse process of CV5-CV6 Flexes & rotates head C2-C6
Rectus capitis anterior Lateral mass of atlas Basilar part of occipital bone Flexes & rotates head C1-C2
Rectus capitis Lateralis Transverse of atlas Jugular process of occipital bone Lateral flexion of neck C1-C2

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