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Anatomy 390 Nervous System > Brachial Plexus > Flashcards

Brachial Plexus Flashcards

1
Q

Ventral Rami (5)

A

C5-8, T1

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2
Q

Trunks (3)

A

Superior trunk - C5-6
Middle trunk - C7
Inferior trunk - C8-T1

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3
Q

Divisions (6)

A

Anterior/Posterior from each trunk; form the cords

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4
Q

Cords (3)

A

Lateral Cord - ant. divisions of superior and middle trunks
Medial Cord - ant. division of inferior trunk
Posterior Cord - post. divisions of all 3 trunks

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5
Q

Branches (17)

A

Lateral Cord - lateral pectoral, musculocutaneous (–> LABC) branch of C7 to ulnar, lateral contribution to median
Medial Cord - medial pectoral, communicantz (b/w lat/med pec), MBC, MABC, medial contribution to median n, ulnar n
Posterior Cord - upper subscapular, thoracodorsal, lower subscapular, axillary (–> LBC), radial (4 - PBC, PABC, superficial radial, deep radial)

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6
Q

Other nerves to consider

A 
Phrenic (C3-5)
Long thoracic (C5-7)
Vagus 
Intercostobrachialis cutaneous (comes off T2 typically) 
N. to subclavius (off superior trunk)
Dorsal scapular (comes off C5)
Suprascapular (comes off superior trunk)
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7
Q

Dorsal scapular

A

Rhomboids & levator scapulae

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8
Q

Phrenic

A

Diaphragm

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9
Q

Long thoracic

A

Serratus anterior

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10
Q

Medial pectoral

A

Pectoralis major and minor

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11
Q

Lateral pectoral

A

Pectoralis major

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12
Q

Thoracodorsal

A

Latissimus dorsi

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13
Q

Suprascapular

A

Supraspinatus and infraspinatus

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14
Q

Musculocutaneous

A

Elbow flexors

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15
Q

Axillary

A

Deltoid and teres minor

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16
Q

Lower subscapular

A

Subscapularis, teres major

17
Q

Upper subscapular

A

Subscapularis

18
Q

Median

A

Wrist and finger flexors, pronators

19
Q

Ulnar

A

Most hand intrinsics

Anatomy 390 Nervous System (7 decks)

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