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19 Cards in this Set

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