Brachial Plexus

Question 1

Nerve branching from C5 Root

Answer 1

Dorsal Scapular Nerve (C5)

Rhomboids, Levator Scapulae

Question 2

Branches of Lateral Cord

Answer 2

“Long-Legged Movers

• Lateral Pectoral (C5-C7)
• Lateral root of Median nerve
• Musculocutaneous n. (C5-C7)

Question 3

Brachial Plexus Segments

Answer 3

“Rugby Team Drinks Cold Beer “

• Roots (n=5)
• Trunks (n=3)
• Divisions (n=6)
• Cords (n=3)
• Branches (n=5)

Question 4

Branches of Medial Cord

Answer 4

“Make Many Moves Using Muscles”

• Medial Pectoral n. (C8/T1)
• Medial Cutaneous n. of arm (T1)
• Medial Cutaneous n. of Forearm (T1)
• Ulnar n. (C8/T1)
• Medial root of Median n.

Question 5

Branches of Lateral Cord

Answer 5

“ULTRA”

• Upper subscapular n. (C5/C6)
• Lower subscapular n. (C5/C6)
• Thoracordorsal n. (C6-C8)
• Radial n. (C5-T1)
• Axillary n. (C5/C6)

Question 6

Dorsal Scapular n.

Answer 6

Nerve root C5
Motor innervation to:
-levator scapulae
-rhomboid major 
-rhomboid minor

Question 7

Suprascapular n.

Answer 7

Nerve root C5/C6
motor innervation:
-supraspinatus 
-infraspinatus
Sensory: GH and AC joints

Question 8

Long Thoracic n.

Answer 8

Nerve root C5, C6, C7
motor innervation:
-serratus anterior

Question 9

Subclavian n.

Answer 9

Nerve root C5
motor innervation:
-subclavius

Question 10

Lateral pectoral n.

Answer 10

Nerve root C5, C6, C7

-Pec. minor with assist from medial pec n.

Question 11

Musculocutaneous n.

Answer 11

Nerve root C5-C7
Motor innervation: 
-biceps brachii
-coracobrachialis
-brachialis. 
Sensory: lateral surface of forearm.

Question 12

Medial Pectoral nn.

Answer 12

Nerve root C8-T1

Motor: Pec minor/ pec major

Question 13

Medial brachial cutaneous n.

Answer 13

Nerve root C8-T1

Sensory: inferior portion of medial side of arm.

Question 14

Medial antebrachial cutaneous n.

Answer 14

Nerve root T1

Sensory: skin overlying bicep and medial side of arm.

Question 15

Ulnar nerve

Answer 15

Root C8-T1
sensory:
-skin on anterior and posterior aspect of medial 1/2 of palm
- Medial 1.5 fingers

Motor: 
- Muscles of forearm not 
  supplied by median nerve
     -flexor carpi ulnaris
     -medial 1/2 of flexor 
      digitorum profundus 
HILA muscles:
     -Hypothenar mm.
     -Interossei (dorsal/palmar)
     -Lumbricals (medial two) 
     -Adductor pollicis 

• All intrinsic muscles except for LOAF:
  
  • Lumbricals
  • Opponens pollicis
  • Abductor pollicis brevis
  • Flexor pollicis brevis

Question 16

Subscapular nn.

Answer 16

Root C5
Motor:
-Superior:
     -Superior portion of                
       subscapularis 
-Inferior:
     -Teres Major
     -Rest of subscapularis

Question 17

Thoracodorsal n

Answer 17

Root C7-C8

Motor innervation of Lattisimus dorsi

Question 18

Axillary n.

Answer 18

Root C5-C7

innervation to deltoid and teres minor