upper extremity neurovascular structures (nerves) Flashcards by meagan b

Q

what does the brachial plexus do?

A

provides vast majority of neural supply to upper extremity

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Q

what forms the brachial plexus?

A

ventral rami of C5-T1 nerve roots

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Q

what are the GENERAL divisions of the brachial plexus in order?

A

roots
trunks
divisions
cords
branches

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Q

identify the GENERAL divisions of the brachial plexus

A

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Q

identify the roots of the brachial plexus

A

C5
C6
C7
C8
T1

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Q

identify the trunks of the brachial plexus AND their roots

A

superior: C5-C6
middle: C7
inferior: C8-T1

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Q

identify the spinal nerve roots as attached to the spine

A

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Q

identify the spinal nerve trunks as attached to the spine

A

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Q

identify the divisions of the brachial plexus, their trunks, and their cords

A

each trunk has anterior and posterior divisions

anterior divisions of middle and superior trunk: lateral cords

anterior divisions of inferior trunk: medial cord

posterior division of all 3 trunks: posterior cord

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Q

identify the spinal nerve divisions as attached to the spine

A

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Q

what do the anterior and posterior divisions each innervate?

A

anterior: anterior musculature
posterior: posterior musculature

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Q

identify the spinal nerve cords as attached to the spine

A

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Q

identify the lateral cord and what branches it forms

A

terminal branches:
musculocutaneous nerve
median nerve

other branches:
lateral pectoral nerve

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Q

what does the lateral pectoral nerve innervate?

A

pectoralis major

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Q

what does the musculocutaneous nerve innervate?

A

biceps brachii
brachialis

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Q

identify the medial cord and what branches it forms

Study These Flashcards

A

terminal branches:
median nerve (medial portion)
ulnar nerve

other branches:
medial pectoral nerve
medial cutaneous nerve
medial antebrachial cutaneous nerve

Q

what does the medial pectoral nerve innervate?

Study These Flashcards

A

pectoralis major
pectoralis minor

Q

what does the medial cord continue as?

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A

ulnar nerve

Q

identify the posterior cord and what branches it forms

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A

terminal branches:
axillary nerve
radial nerve

other branches:
upper subscapular nerve
thoracodorsal nerve
lower subscapular nerve

Q

what does the upper subscapular nerve innervate?

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A

subscapularis

Q

what does the thoracodorsal nerve innervate?

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A

latissimus dorsi

Q

what does the lower subscapular nerve innervate?

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A

teres major
subscapularis

Q

identify the brachial plexus branches (associated with attached to the spine)

Study These Flashcards

A

axillary
radial
musculocutaneous
median
ulnar

Q

axillary nerve motor functions

Study These Flashcards

A

motor:
deltoid
teres minor

identify the branches of the brachial plexus

ulnar nerve motor functions

motor: forearm: flexor carpi ulnaris flexor digitorum profundus thenar: hypothenar muscles adductor pollicis fingers: palmar interosseous dorsal interosseous III + IV lumbricals digiti minimi: abductor digiti minimi opponens digiti minimi flexor digiti minimi

median nerve motor functions

motor: flexor and pronator muscles in anterior compartment of forearm (except for carpi ulnaris and part of flexor digitorum profundus) thenar muscles and lateral 2 lumbricals

axillary nerve sensory functions

sensory: Lkin over the lower deltoid

ulnar nerve sensory functions

sensory: little finger 1/2 of ring finger

median nerve sensory functions

lateral aspect of palm 3 and a 1/2 fingers on anterior (palmar) surface of hand 3 and a 1/2 distal digits dorsally

radial nerve motor functions

triceps brachii extensor muscles in forearm

radial nerve sensory functions

posterior forearm lateral aspect of dorsal of hand dorsal surface of lateral 3 and a 1/2 digits

identify upper extremity sensory distribution

identify hand sensory distribution