Brachial Plexus Anatomy Flashcards
What does the long thoracic nerve innervate
Serratus anterior
NCS findings in plexopathy that distinguishes injury proximal vs distal to DRG
Proximal - SNAP is preserved, but CMAP is abnormal
Distal - decreased SNAP
What muscles does musculocutaneous nerve innervate
Brachialis, biceps, coracobrachialis
What nerves come off the medial cord?
Medial brachial and antebrachial cutaneous nerves
What makes up the musculocutaneous branch?
Lateral cord
What does the upper subscapular nerve innervate
Subscapularis
Where does suprascapular nerve branch from
Upper trunk
Nerve root innervation for subscapularis
C5,6,7
What is nerve root innervation for pectoralis minor
C8,T1
What does the medial pectoral nerve innervate
Pectoralis major and pectoralis minor
What makes up the medial cord of the brachial plexus?
The anterior division of the lower trunk
2 nerves off the roots
Dorsal scapular nerve and long thoracic nerve
What does the lateral pectoral nerve innervate
Lateral portion of pectoralis major
2 nerves off the divisions
Medial and lateral pectoral nerve
Pectoralis major nerve root innervation
C5,6 (lateral pectoral nerve) and C7,8,T1 (medial pectoral nerve)