Brachial Plexus (Week 6)

Question 1

Where does brachial plexus emerge between?

Answer 1

Anterior and Middle scalenes

Question 2

Brachial Plexus Relationship to SCM, Clavicle

Answer 2

Posterior

Question 3

Cranial Nerve XI (Spinal Accessory) Supplies

Answer 3

SCM, Upper Trapezius

Question 4

Contents of Axilla

Answer 4

Infraclavicular Part of Brachial Plexus
Other nerves (long thoracic, thoracodorsal)
Axillary artery and vein
Lymph nodes
Fat and CT

Question 5

Nerves to scaleni and longus colli origin

Answer 5

C2-8 Nerve Roots
Longus Colli: C2-6
Scaleni: C3-8

Question 6

Phrenic Nerve Origin

Answer 6

C3-5
Ventral Rami (cervical rami C3-4 and brachial plexus 5)

Question 7

Dorsal Scapular Nerve Origin/Muscle Supply

Answer 7

C4-5 Roots
Levator Scapulae
Rhomboids Major/Minor

Question 8

Long Thoracic Nerve Origin/Supply

Answer 8

C5-7 roots
Serratus Anterior

Question 9

Nerve to Subclavius Origin

Answer 9

C4?, C5-6
Upper Trunk of B.P

Question 10

Suprascapular Nerve O/S

Answer 10

C4?, 5,6
Arises from Upper Trunk of B.P
Supraspinatus
Infraspinatus

Question 11

Lateral Pectoral Nerve o/s

Answer 11

C5-7
Lateral Cord of B.P
Pectoralis Major

Question 12

Medial Pectoral Nerve O/S

Answer 12

C8-T1
Medial Cord of B.P
Pectoralis Major/Minor

Question 13

Upper and Lower Subscapular Nerves O/S

Answer 13

C5-7
Posterior Cord of B.P
Upper Supplies Subscapularis
Lower Supplies Subscapularis and Teres Major

Question 14

Thoracodorsal Nerve O/S

Answer 14

C6-8
Posterior Cord of B.P
Supplies Latissimus Dorsi

Question 15

Thoracic Outlet Syndrome

Answer 15

Compression of neurovascular structures

Question 16

Brachial Plexus Course

Answer 16

1. Between scalenes
2. With subclavian artery
3. Under clavicle
4. Over first rib
5. With axillary artery (after
   lat border 1st rib)
6. Cervico axillary canal
7. Axillary space
8. Medial arm

Question 17

Order of Divisions In BP

Answer 17

Roots, Trunks, Divisions, Cords

Question 18

Common Impingement Areas for Thoracic Outlet Syndrome

Answer 18

• Ant. Mid. Scalene/Clavicle (Scalene Triangle)
• Pectoralis Minor/First Rib (Pectoralis Minor Space)
• Clavicle and 1st Rib
  (Costoclavicular Space)