Lecture 4 - Spinal Nerves: Part II Flashcards
What nerves come from the posterior cord of the brachial plexus?
- upper subscapular nerve
- middle subscapular/thoracodorsal nerve
- lower subscapular nerve
- axillary nerve
- radial nerve
What are the nerve roots for the posterior cord?
C5-T1
What is the target muscle for the upper subscapular nerve?
subscapularis
What are the nerve roots for the upper subscapular nerve?
C5-C6
What are the nerve roots for the middle subscapular/thoracodorsal nerve?
C6-C8
What is the target muscle for the thoracodorsal nerve?
lat dorsi
What are the nerve roots for the lower subscapular nerve?
C5-C6
What is the target muscle for the lower subscapular nerve?
Subscapularis and teres major
What are the nerve roots for the axillary nerve?
C5-C6
What are the nerve roots for the radial nerve?
C5-T1
What are the target muscles for the axillary nerve?
deltoid, teres minor
What is the most common problem around the UE?
teres minor (axillary nerve)
What does the cutaneous branch of the axillary nerve supply?
shoulder girdle along deltoid
What arm/elbow muscles does the radial nerve supply?
triceps, brachialis (C7), anconeus, supinator
What forearm muscles does the radial nerve supply?
- abductor pollicis longus
- extensor pollicis brevis
- extensor carpi radialis longus/brevis
- extensor pollicis longus
- extensor digitorum
- extensor indicis
- extensor digiti minimi
- extensor carpi ulnaris
What is compartment 1 of the forearm by the radial nerve?
- abductor pollicis longus
- extensor pollicis brevis
What is compartment 2 of the forearm from the radial nerve?
extensor carpi radialis longus/brevis
What is the 3rd compartment of the forearm from the radial nerve?
extensor pollicis longus
What is the 4th compartment of the forearm from the radial nerve?
extensor digitorum and extensor indicis
What is the 5th compartment of the forearm by the radial nerve?
extensor digiti minimi
What is the 6th compartment of the forearm by the radial nerve?
extensor carpi ulnaris
What is important with the muscles innervated by the radial nerve?
decerebrate posture
What does the lumbar plexus branch from?
ventral rami of T12-L4 spinal nerves directly
