Brachial Plexus Flashcards

1
Q

Origin of Brachial Plexus

A

Anterior rami of spinal nerves c5 c6 c7 c8 t1

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2
Q

Order from inside the neck

A

rootlets, roots, spinal nerves, rami

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3
Q

Order from outside the neck

A

roots, trunks, divisions, chords, branches

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4
Q

Trunks

A

Upper, middle, lower

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5
Q

Divisions

A

anterior and posterior divisions from each upper middle and lower trunk

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6
Q

Lateral Cord origin

A

Anterior divisions from upper and middle trunks

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7
Q

Posterior Cord origin

A

Posterior divisions of all 3 trunks

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8
Q

Medial Cord origin

A

anterior division of lower trunk

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9
Q

Upper trunk origin

A

C5 and C6

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10
Q

Middle trunk origin

A

C7

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11
Q

Lower trunk origin

A

C8 and T1

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12
Q

2 Branches from the “roots” of the brachial plexus

A

Dorsal Scapular Nerve (C5)

  • Levator Scapulae
  • Rhomboids Major and Minor

Long Thoracic Nerve (C5-7)
- Serratus anterior

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13
Q

2 branches from “trunks” of the brachial plexus

A

Suprascapular Nerve (C5, C6)

  • Supraspinatus
  • Infraspinatus

Nerve to Subclavius (C5, C6)
- Subclavius

*upper trunk

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14
Q

3 Branches from the “lateral cord” of the BP

A

Lateral Pectoral Nerve
- Pectoralis Major and Minor

Musculocutaneous Nerve

  • Biceps Brachii
  • Bachialis
  • Coracobrachialis

Median Nerve

  • Anterior Forearm**
  • Hand
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15
Q

5 Braches from the “medial cord” of the BP

A

Medial Pectoral Nerve
- Pectoralis Major and Minor

Medial Cutaneous Nerves of arm/forearm (2 branches)

Ulnar Nerve

  • Anterior Forearm
  • Hand **

Median Nerve

  • Anterior Forearm **
  • Hand
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16
Q

Posterior Cord travels

A

Behind Axillary Artery

17
Q

5 branches from the posterior cord of the BP

A

Axillary Nerve

  • Deltoid
  • Teres Minor

Radial Nerve
- Extensors of upper limb

Thoracodorsal Nerve
- Latissimus Dorsi

Upper Subscapular Nerve (before Thor. N.)
- Subscapularis

Lower Subscapular Nerve (after Thor. N.)

  • Subscapularis
  • Teres Major
18
Q

Anterior Arm innervation

A

Musculocutaneous

19
Q

Posterior arm innervation

A

radial nerve

20
Q

Anterior forearm innervation

A

median nerve **

ulnar nerve

21
Q

Hand Innervation

A

Ulnar nerve **

median nerve

22
Q

Posterior forearm

A

Radial Nerve