Brachial Plexus + ulnar medial radial nerves

Question 1

What forms the Thoracic outlet/ what goes through it ?

Answer 1

Collar bone + upper ribs crossed by scalene muscles

Brachial plexus + subclavian artery run through it

Question 2

What spinal nerves form Brachial plexus ?

Answer 2

C5-T1

Question 3

What spinal nerves form the trunks of the BP (upper, middle, lower)

Answer 3

Upper = C5-C6
Middle = C7
Lower = C8-T1

Question 4

What Nerves are in the Posterior cord of the BP (includes all three trunks)

Answer 4

• Upper subscapular nerve (C4,C5,C6,C7)
  
  • Lower Subscapular nerve (C5,C6)
  • Thoracodorsal Nerve (C6,C7,C8)
  • Axillary Nerve (C5,C6)
  • Radial Nerve (C5,C6,C7,C8,T1)

Question 5

What nerves are in the lateral cord? (Includes Middle and upper trunks)

Answer 5

• Lateral Pectoral Nerve (C5,C6,C7)
  
  • Musculocutaneous (C5,C6,C7)
  • Median nerve (C5,C6,C7)

Question 6

What nerves are in the medial cord? (Includes the lower trunk)

Answer 6

• Medial Pectoral Nerve (C8,T1)
  
  • Medial Brachial Cutaneous Nerve (T1)
  • Medial Antebrachial cutaneous nerve (C8,T1)
  • Ulnar Nerve (C7,C8,T1)
  • Median Nerve/medial root (C8,T1)

Question 7

Musculocutaneous nerve has what nerve roots?

Answer 7

C4-C7

Question 8

Axillary Nerve has what nerve roots?

Answer 8

C5 C6

Question 9

Dorsal scapular Nerve has what nerve roots ?

Answer 9

C5

Question 10

Suprascapular Nerve has what nerve roots ?

Answer 10

C5 C6

Question 11

The course of the median nerve ? (Upper arm)

Answer 11

Leaves axilla 
Lateral brachial artery 
Medial to bicep 
Medial side cubital fossa
Anterior to brachialis

Question 12

Course of Median nerve ?( Lower arm )

Answer 12

Between pronator teres
Between FDP/FDS
Passes through carpal tunnel

Question 13

Muscles the median nerve innervates ?

Answer 13

Pronator teres
FDS
FCR
Palmaris Longus

Question 14

Branches of the Median nerve ?

Answer 14

Anterior interosseous nerve

Palmar cutaneous nerve

Question 15

What does the Anterior interosseous nerve innervates?

Answer 15

Flexor pollicis longus
FDP
Pronator quadratus

Question 16

What does the palmar cutaneous nerve innervate ?

Answer 16

Flexor pollicis brevis
Abductor pollicis brevis
Opponens pollicis
1st 2nd lumbricals

Question 17

Course of the ulnar nerve in the upper arm?

Answer 17

• Medial to brachial artery
• Descends to medial head of triceps
• between medial epicondyle and olecranon process
• between Flexor carpi ulnaris into forearm

Question 18

Course of ulnar nerve through forearm?

Answer 18

• Ulnar collateral lig of elbow
• To the FDP
• Medial to the ulnar artery in lower 2/3rds of arm
• over flexor retinaculum
• through canal of guyon

Question 19

What muscles are innervated by ulnar nerve ?

Answer 19

Flexor carpi ulnaris 
Flexor digitorum profundus 
Abductor digiti minimi 
Flexor digiti minimi
Opponens digiti minimi 
3rd 4th lumbricals 
Interossei 
Abductor pollicis 
Flexor pollicis brevis

Question 20

What is Handlebar palsy ?
Where?
What nerve?

Answer 20

Tunnel of guyon
Ulnar nerve entrapment
Wasting of hypothenar eminence

Question 21

Course of radial nerve in upper arm

Answer 21

• Passes through posterior axilla
• between triceps and humerus
• lies between brachialis and brachioradialis
• to front of lateral epicondyle
• divides into terminal superficial and deep branches

Question 22

Muscels innervated by radial Nerve:

Answer 22

Triceps 
Anconeus 
Brachialis 
Brachioradialis 
Extensor carpi radialis longus 
Extensor carpi radialis brevis 
Supinator 
Extensor digitorum 
Extensor digiti minimi 
Extensor carpi ulnaris 
Extensor pollicis longus 
Extensor indicis 
Abductor pollicis longus 
Extensor pollicis brevis

Question 23

Damage to radial nerve will result in what?

Answer 23

Wrist drop

Question 24

“The radial tunnel” the radial nerve passes betweeen what structures ?

Answer 24

Supinator + radius