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Flashcards in Brachial Plexus Deck (32):
1

What are the 3 TRUNKS of the brachial plexus

Upper
Middle
Lower

2

Upper TRUNK of the brachial plexus is formed by:

C5 & C6

3

Middle TRUNK of the brachial plexus is formed by:

C7 ALONE

4

Lower TRUNK of the brachial plexus is formed by:

C8 & T1

5

What are the DIVISIONS of the brachial plexus?

Anterior
Posterior

6

What are the CORDS of the brachial plexus

Lateral
Medial
Posterior

7

Form the fusion of the ANTERIOR division of the upper & middle trunks & contains fibers from:

C5, C6, & C7

8

From the ANTERIOR division of the lower trunk and contains fibers from:

C8 & T1

9

From the POSTERIOR division of ALL 3 trunks & contains fibers from

C5, C6, C7, C8 and T1

10

Nerves directly from the Spinal Nerves:

- Dorsal Scapular
- Long Thoracic

11

Nerves from the UPPER trunk:

- Suprascapular
- Nerve to the subclavius

12

Nerves from the Lateral cord:

- Lateral pectoral
- Musculocutaneous
- Part of the median

13

Nerves from the MEDIAL cord

- Medial pectoral
- Medial brachial cutaneous
- Medial antebrachial cutaneous
- Ulnar
- Part of the Median

14

Nerves from the POSTERIOR cord:

- Upper & lower subscapular
- Thoracodorsal
- Axillary
- Radial

15

Dorsal Scapular Nerve:
Segmental innervation
Motor Supply
Articular supply

Segmental Innervation: C5
Motor supply: Rhomboid major/minor, Levator Scapula
Articular Supply: Acromicoclavicular Joint

16

Long Thoracic Nerve:
Segmental supply
Motor supply

Segmental Innervation: C5, C6 & C7
Motor Supply: Serratus Anterior

17

Suprascapular Nerve:
Segmental supply
Motor supply
Articular supply

Segmental Supply: C5 & C6
Motor Supply: Supraspinatus & infraspinatus
Articular Supply: Shoulder joint

18

Nerve to the Subclavius:
Segmental supply
Motor supply
Articular supply

Segmental Innervation: C5 & C6
Motor Supply: Subclavius
Articular Supply: Sternoclavicular joint

19

Lateral pectoral Nerve
Segmental innervation
Motor supply

Segmental Innervation: C5, C6 & C7
Motor Supply: Pectoralis Major

20

Musculocutaneous Nerve:
Segmental inn.
Motor supply
Articular supply
Cutaneous supply

Segmental innervation: C5, C6 & C7
Motor Supply: Coracobrachialis, Biceps Brachii, & Brachialis
Articular Supply: Elbow Joint
Cutaneous Supply: Lateral Aspect go the forearm

21

Medial Pectoral Nerve:
Segmental innervation
Motor supply

Segmental Innervation: C8 & T1
Motor Supply: Pectoral Major & minor

22

Medial Brachial Cutaneous Nerve:
Segmental innervation
Cutaneous supply

Segmental Innervation: T1 ONLY
Cutaneous Supply: Medial aspect of the arm

23

Medial Antebrachial Cutaneous Nerve:
Segmental innervation
Cutaneous supply

Segmental Innervation: C8 & T1
Cutaneous Supply: Medial aspect of the forearm

24

Ulnar Nerve:
Segmental innervation
Motor supply
Articular supply
Cutaneous supply

Segmental Innervation: C8 & T1
Motor supply: Flexor Carpi Ulnaris, 1/2 of Flexor digitorum profundus, Hypothenar muscles
Articular Supply: Elbow & wrist joint
Cutaneous supply: Medial aspect of the palm, Dorsum of the hand, Skin of digits 5, and part of digit 4

25

Median Nerve:
Segmental innervation
Motor supply
Articular supply
Cutaneous supply

Segmental Innervation: C6, C7, C8 & T1
Motor supply: Most of the muscles of the anterior forearm
Articular Supply: Elbow & wrist joint
Cutaneous Supply: Lateral 3/4 of the palmar surface of the hand & skin of the 1st 3 1/2 digits

26

Upper subscapular Nerve:
Segmental supply
Motor supply

Segmental Innervation: C5
Motor Supply: Subscapularis

27

Lower Subscapular Nerve:
Segmental innervation
Motor supply

Segmental Innervation: C6
Motor Supply: Subscapularis & Teres Major

28

Thoracodorsal Nerve:
Segmental innervation
Motor supply

Segmental Innervation: C6, C7 & C8
Motor Supply: Latissimus Dorsi

29

Axillary Nerve:
Segmental innervation
Motor supply
Articular supply
Cutaneous supply

Segmental Innervation: C5 & C6
Motor Supply: Deltoid & Teres Minor
Articular Supply: Shoulder joint
Cutaneous Supply: Lateral aspect of the ARM

30

Radial Nerve:
Segmental innervation
Motor supply
Articular supply
Cutaneous supply

Segmental Innervation: C5, C6, C7, C8 & T1
Motor Supply: Triceps brachii, Anconeus, all of the posterior forearm muscles
Articular Supply: Elbow & wrist joint
Cutaneous Supply: Most of the posterior arm & forearm; dorsum of the hand ( not supplied by the median & ulnar nerves

31

Plexus in which C4 is the most superior spinal nerve root forming the plexus. In this type of plexus, C8 would be the most inferior spinal nerve root

Prefixed Brachial Plexus

32

Plexus in which C6 is the most superior spinal nerve root forming the plexus. In this type of plexus, T2 would be the most inferior spinal nerve root

Postfixed Brachial Plexus