Brachial Plexus Flashcards by Cassia Chitla | Brainscape

Q

Order of brachial plexus

A

Roots => Trunks => Divisions => Cords => Branches

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Q

Superior Trunk

A

C5-C6

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Q

Middle Trunk

A

C7

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Q

Inferior Trunk

A

C8-T1

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Q

Anterior vs Posterior Divisions

A

Anterior divisions innervates preaxial (flexors)

Posterior divisions innervate postaxial (extensors)

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Q

Lateral Cord forms from

A

Anterior divisions of Superior and Middle trunks

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Q

Medial Cord forms from

A

Anterior division of Inferior trunk

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Q

Posterior Cord forms from

A

Posterior divisions of all trunks

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Q

Lateral cord gives rise to

A

Musculocutaneous Nerve

Median Nerve

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Q

Medial cord gives rise to

A

Ulnar Nerve

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Q

Posterior cord gives rise to

A

Axillary Nerve

Radial Nerve

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Q

Dorsoscapular nerve

A

C5 root branch

Rhomboids, Levator Scapulae

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Q

Long thoracic nerve

A

C5-C7 root branch

Serratus Anterior

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Q

Subclavius nerve

A

C5-C6 superior trunk branch

Supraspinatus and infraspinatus

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Q

Musculocutaneous nerve

A

C5-C7 lateral cord branch

Anterior arm muscles

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Q

Median nerve

A

C6-7; C8-T1 lateral cord branches

Forearm flexors and thenars

Q

Lateral pectoral nerve

A

C5-C7 lateral cord branch

Pectoralis major

Q

Ulnar nerve

A

C8-T1 medial cord branch

Majority of intrinsic hand muscles

Q

Medial pectoral nerve

A

C8-T1 medial cord branch

Pectoralis major and minor

Q

Medial brachial cutaneous nerve

Medial antebrachial cutaneous nerve

A

C8-T1 medial cord branch

Sensory

Q

Axillary nerve

A

C5-C6 posterior cord branch

Deltoid, Teres Minor

Q

Radial nerve

A

C5-T1 posterior cord branch

Arm and forearm extensors

Q

Upper subscapular nerve

A

C5-C6 posterior cord branch

Subscapularis

Q

Middle subscapular (thoracodorsal) nerve

A

C6-C8 posterior cord branch

Latissimus dorsi

Q

Lower subscapular nerve

A

C5-C6 posterior cord branch

Subscapularis, Teres Major

Q

Erb-Duchenne Palsy

A

Upper trunk C5-C6 roots

Axillary nerve, musculocutaneous nerve, radial cutaneous nerve

Q

Klumpke’s Paralysis

A

Lower trunk C8-T1

Ulnar and median nerve