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19 Cards in this Set
- Front
- Back
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nerve roots involved in brachial plexus
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C5 - T1 (5 roots)
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Proximal inputs to Superior trunk
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C5-C6
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Proximal inputs to Middle trunk
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C7
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Proximal inputs to Inferior trunk
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C8-T1
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Proximal to Distal Nomenclature
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Roots -> Trunks -> Divisions -> Cord -> Branches
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Number of parallel pathways (Roots -> Trunks -> Divisions -> Cord -> Branches )
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5 -> 3 -> 6 -> 3 -> 5
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Organization of divisions
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Each trunk has anterior/posterior division
therefore: 3 posterior & 3 anterior |
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Posterior Division
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innervates extensor (upper limb) compartment
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Anterior Division
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innervates flexor (upper limb) compartment
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Cord Names
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lateral, posterior, medial
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proximal feeding into lateral cord
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ant. sup. division
ant. mid. division |
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proximal feeding into medial cord
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ant. inf. division
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proximal feeding into posterior cord
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all 3 post divisions from each trunks (lateral, posterior, medial)
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Axillary artery
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intimately assoc. w/ cord portion of brachial plexus
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Names of terminal branches
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musculocutaneous n.
lateral root median n. ulnar n. medial root median n. axillary n. radial n. |
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Distal branches of lateral cord
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musculocutaneous n.
lateral root median n. |
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Distal branches of medial cord
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ulnar n.
medial root median n. |
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Distal branches of posterior cord
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axillary n.
radial n. |
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