ANAT 2647 Cervical Plexus - • C2 • Behind the ear Great...

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Cervical Plexus Plexus roots C1, C2, C3, C4 Loops C1-C2 (inconstant), C2-C3, C3-C4 Motor Sensory Largest branches
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Motor Nerves of the Cervical Plexus Ansa cervicalis Nerve to geniohyoid Nerve to thyrohyoid Nerve to sternothyroid Nerve to sternohyoid Nerve to the Omohyoid Superior belly Inferior belly Spinal Accessory Nerve Phrenic Nerve
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Sensory Nerves of the Cervical Plexus Pass inferior to the sternocleidomastoid Small occipital Great auricular Transverse cervical Supraclavicular
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Ansa Cervicalis Lies superficial to or within the carotid sheath Superior root C1 Runs with the hypoglossal nerve Inferior root C2, C3
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Spinal Accessory Nerve To sternocleidomastoid C2, C3 To trapezius C3, C4
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Phrenic Nerve C3, C4 , C5 Runs anterior to the anterior scalene Passes between the subclavian artery and vein Passes anterior to the roots of the lung Innervates the diaphagm Accessory phrenic C5
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Small (lesser) Occipital Nerve
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Unformatted text preview: • C2 • Behind the ear Great Auricular Nerve • C2, C3 • In front of the ear Transverse Cervical • C2, C3 • In anterior triangle • Cuts across the neck Supraclavicular Nerves • C3, C4 • Common trunk • Anterior/medial • Middle/intermediate • Posterior/lateral Intercostal Nerves • Lateral branches • Muscular branches • Anterior Branches • Thoracic vs. thoracoabdominal Intercostal Nerves • Run in the costal groove • Collateral branch runs along the superior surface of the rib below • (Greater) occipital – Dorsal primary ramus of C2 – Pierces the semispinalis capitis and trapezius – Cutaneous innervation of occipital skin – Motor innervation of semispinalis capitis • Third occipital (least) – Dorsal Primary ramus of C3 – Pierces the trapezius – Cutaneous innervation of occipital skin • Superior cluneal...
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This note was uploaded on 11/23/2011 for the course ANAT 2647 taught by Professor Ronaldg.mayne during the Winter '11 term at Life Chiropractic College West.

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ANAT 2647 Cervical Plexus - • C2 • Behind the ear Great...

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