brachial plexus

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stephbrooks1
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20187
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brachial plexus
Updated:
2010-05-21 14:20:15
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brachial plexus
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27. Be able to identify the following structures of the brachial plexus
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  1. a. Roots: The brachial plexus is formed by the union of the anterior rami of the _____ to _______ nerves, which constitute the roots of brachial plexus
    C5–T1 nerves
  2. b. Trunks of the brachial plexus and there root connections
    • A superior trunk, from the union of the C5 and C6 roots.
    • A middle trunk, which is a continuation of the C7 root.
    • An inferior trunk, from the union of the C8 and T1 roots
  3. Divisions of the brachial plexus: Each trunk of the brachial plexus divides into _________ and ___________ divisions as the plexus passes through the _____________ canal posterior to the clavicle
    anterior


    posterior


    cervicoaxillary
  4. trunks of the brachial plexus form what next?
    where does this division take place?
    what are the cords called?
    form three cords of the brachial plexus,

    within the axilla:


    Lateral, Medial and Posterior Cords
  5. after the 3 cords in the brachial plexus, what is formed ?

    what are there names
    • terminal branches
    • Musculocutaneous: muscles of anterior compartment of arm, skin lateral aspect. (lateral cord)

    Median: Muscles of anterior forearm compartment (except for FCU and Ulnar half of FDP), palmer skin and 5 intrinsic muscles of the thenar ½ of palm. (lateral and medial cord)

    Ulnar: FCU and the ulnar ½ of the FDP, most intrinsic muscles of the hand, skin of hand (medial to axial line of digit 4). (median cord)

    Axillary: Glenohumeral joint, teres minor, deltoid, skin of superolateral arm (over inferior part of deltoid). (posterior cord)

    Radial: All muscles of posterior compartments of arm and forearm, skin of posterior and infrolateral arm/posterior forarm/dorsum of hand (lateral to axial line of digit 4). (posterior cord)

    marmu
  6. terminal branches -marmu
    superior to inferior list in order
    • musculocutaneous
    • axillary
    • radial
    • median
    • ulner
  7. list 3 cords order superior to inferior
    lateral

    posterior

    • medial
    • lpm
  8. of the brachial plexus list the 3 trunks superior to inferior and what ventral rami of spinal root makes these
    superior c5 c6


    middle c7


    inferior c8 T1
  9. superior trunk divides into ___________ and ____________ cords of the brachial plexus
    lateral


    posterior
  10. superior, middle, and inferior make up _____________ cord of brachial plexus
    posterior cord
  11. inferior trunk of the brachial complex for __________ and ___________ cord
    medial and posterior
  12. the lateral cord of brachial plexus forms __________ and __________ terminal branches (nerves)
    median


    muculocutaneous
  13. the posterior cord of brachial plexus forms __________ and __________ terminal branches (nerves)
    axillary


    radial
  14. the medial cord of brachial plexus forms __________ and __________ terminal branches (nerves)

    which one is formed by lateral and medial cords?
    ulnar -

    median (formed by lateral and medial cords)
  15. Terminal branches – Identify what area of upper limb that each supplies. Musculocutaneous:
    muscles of anterior compartment of arm, skin lateral aspect.
  16. Terminal branches – Identify what area of upper limb that each supplies.
    • Median:
    • Muscles of anterior forearm compartment (except for FCU and Ulnar half
    • of FDP), palmer skin and 5 intrinsic muscles of the thenar ½ of palm.
  17. Terminal branches – Identify what area of upper limb that each supplies. Ulnar:
    • FCU and the ulnar ½ of the FDP, most intrinsic muscles of thehand, skin
    • of hand (medial to axial line of digit 4).
  18. Terminal branches – Identify what area of upper limb that each supplies. Axillary
    Glenohumeral joint, teres minor, deltoid, skin of superolateral arm(over inferior part of deltoid).
  19. Terminal branches – Identify what area of upper limb that each supplies. Radial:
    All muscles of posteriorcompartments of arm andforearm, skin of posterior and infrolateralarm/posterior forarm/dorsum of hand (lateral to axial line of digit 4).

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