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9 Cards in this Set
- Front
- Back
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Brachial Plexus |
A nerve plexus is a network of nerves that may be divided into a SUPRACLAVICULAR DIVISION (which lies superior to clavicle) and an INFERIORCLAVICULAR DIVISION (which lies inferior to clavicle) |
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SUPRACLAVICULAR DIVISION |
Ventral Rami 3 Trunk 4 nerves that arise from the rami & trunks |
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INFERACLAVICULAR DIVISION |
lies in axilla and consists of : 3 cords and nerves arising from those cords. |
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Step 1 in Brachial Plexus |
Ventral Rami of C5 & C6 join to create Superior upper trunk C7 creates Middle Trunk C8 &T1 create INFERIOR lower trunk |
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Step 2 in Brachial Plexus |
Each of 3 trunks then divides posterior to clavicle into ANTERIOR DIVISION and POSTERIOR DIVISION. |
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Step 2 continued. |
Nerve fibers in ANTERIOR DIVISION innervate anterior regions of upper extremity, while those in POSTERIOR DIVISION innervate posterior region
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Anterior Divison |
ANTERIOR DIVISION from C5, C6,C7 trunks create LATERAL CORD (C5,C6,C7) ANTERIOR DIVISION from INFERIOR TRUNK (C8 , T1) create MEDIAL CORD |
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Posterior Division |
Posterior divisions from Superior (C5, C6) , Middle (C7) and inferior (C8,T1) TRUNKS unite to create the POSTERIOR CORD (C5,C6,C7,C8,T1) |
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Nerve Cord Naming |
Are named relative to the axillary artery LATERAL CORD lies lateral to artery , MEDIAL CORD lies medial to artery POSTERIOR CORD lies posterior to artery |
