Origin
This nerve originates from anterior ramus of C5
Dorsal scapular nerve
This nerve descends medial arm & passes posterior to medial epicondyle of humerus
Ulnar nerve
This nerve innervates skin of medial side of arm (as far distal as medial epicondyle of humerus & olecranon of ulna)
Medial cutaneous nerve of arm
Which two nerves originate from superior trunk, but one travels to scapular notch while other travels posterior to clavicle
- Subclavian nerve
A patient has weakness in the rhomboids, which nerve is affected & where does it originate?
- Dorsal scapular nerve
- C5
This nerve originates from C6-T1 rami & connects to lateral/medial cords
Median nerve
This nerve passes posteriorly & enters subscapularis directly
Upper subscapular nerve
This nerve innervates the latissimus dorsi
Thoracodorsal nerve
Which two nerves are associated with subscapularis, but one supplies its superior portion while other supplies inferior portion?
- Upper subscapular nerve
- Lower subscapular nerve
A patient has weakness in their serratus anterior muscle, which nerve affected & what are its spinal roots?
- Long thoracic nerve
- C5/C6/C7
This nerve comes from superior trunk & receives fibers from C5/C6
Suprascapular nerve
This nerve descends posterior to clavicle & anterior brachial plexus/subclavian artery
Subclavian nerve
This nerve innervates the coracobrachialis/biceps brachii/brachialis/skin on lateral aspect of forearm
Musculocutaneous nerve
Which nerve has roots C6/C7/C8 & supplies a muscle that is much larger than the other nerves supplying subscapularis?
Thoracodorsal nerve
A nerve injury causes weakness of both supraspinatus & infraspinatus, which nerve & what structure does the nerve pass through to reach these muscles?
- Suprascapular nerve
- Scapular notch
This nerve originates from C5-T1 & only connected to superior/middle/inferior trunks
This nerve exits axillary fossa posteriorly & passes through quadrangular space with circumflex humeral artery
Axillary nerve
This nerve innervates pec minor & SC part of pec major
A nerve supplies pec major while another supplies both pec major/minor, identify both
- Lateral pectoral nerve --> pec major
- Medial pectoral nerve --> pec major (SC head)/pec minor
A patient has weakness in their teres major & inferior portion of subscapularis, which nerve affected & its origin?
- Lower subscapular nerve
- C6
What three nerves originate from the posterior cord?
- Upper subscapular nerve
- Thoracodorsal nerve
- Lower subscapular nerve
This nerve arises between upper & lower subscapular nerves & runs inferolaterally along posterior axillary wall to apical part of latissimus dorsi
Thoracodorsal nerve
This nerve innervates AC/GH joints/teres minor/deltoid muscles/skin on superolateral arm
Axillary nerve
This nerve comes from superior trunk, travels through scapular notch, supplies two rotator cuff muscles, & provides articular fibers to GH joint, which nerve?
Suprascapular nerve
A patient has weakness in their SC joint, which nerve is affected & which structure does this nerve originate from?
- Subclavian nerve
- Superior nerve