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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
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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
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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
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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
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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
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terminal branches -marmu
superior to inferior list in order
- musculocutaneous
- axillary
- radial
- median
- ulner
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list 3 cords order superior to inferior
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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
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superior trunk divides into ___________ and ____________ cords of the brachial plexus
lateral
posterior
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superior, middle, and inferior make up _____________ cord of brachial plexus
posterior cord
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inferior trunk of the brachial complex for __________ and ___________ cord
medial and posterior
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the lateral cord of brachial plexus forms __________ and __________ terminal branches (nerves)
median
muculocutaneous
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the posterior cord of brachial plexus forms __________ and __________ terminal branches (nerves)
axillary
radial
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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)
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Terminal branches – Identify what area of upper limb that each supplies. Musculocutaneous:
muscles of anterior compartment of arm, skin lateral aspect.
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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.
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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).
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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).
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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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