Neuro - Important Nerves Of Arm (not finished)

Question 1

What are the roots of the radial nerve?

Answer 1

-C5-T1

Question 2

What muscles does the radial nerve innervate?

Answer 2

Back of arm:

• Triceps
• Anconeus
• Brachioradialis

Posterior aspect (in anatomical position) of forearm

• Extensor carpi radialis
• Supinator
• Extensor carpi ulnaris
• Extensor digitorum
• Extensor indicis
• Extensor digiti minimi
• Extensor pollicis longus and brevis
• Abductor pollicis longus

Question 3

What sensory area does the radial nerve cover?

Answer 3

Image

Question 4

Name the roots of the following reflexes:

• Ankle
• Knee
• Biceps
• Triceps

Answer 4

• Ankle: S1-S2
• Knee: L3-L4
• Biceps: C5-C6
• Triceps: C7-C8

Question 5

What are the roots of the ulnar nerve?

Answer 5

-C8-T1

Question 6

What muscles does the ulnar nerve innervate?

Answer 6

• Medial 2 lumbricals
• Abductor pollicis
• Interossei
• Hypothenar muscles
• Flexor carpi ulnaris

Question 7

What is the sensory distribution of the ulnar nerve?

Answer 7

Insert picture

-Medial 1 1/2 fingers (palmar and dorsal aspects)

Question 8

What is the path of the ulnar nerve?

Answer 8

• Travels through posteromedial aspect of upper arm to the flexor compartment of the forearm
• Enters the palm of hand via Guyon’s canal, superficial to flexor retinaculum and lateral to pisiform bone