Limbs Anterior Shoulder Pathway Notes

1. Pathways to Anterior Shoulder 
1. Blood Supply 
1. Aorta  aortic Arch  L subclavian or brachiocephalic to R subclavian  
1. Axillary first part 
1. Superior thoracic 
2. Axillary second part 
1. Thoracoacromial 
1. Deltoid 
2. Pectoral 
3. Acromial 
4. Clavicular 
2. Lateral thoracic 
3. Axillary third part 
1. Subscapular  thoracodorsal 
2. Anterior circumflex humoral 
3. Brachial after teres major 
2. Blood Drainage 
1. Cephalic vein or basilic vein  axillary  subclavian  brachiocephalic  SVC
3. Nerve Supply 
1. Afferent 
1. Somatic 
1. Reversal of efferent somatic except through dorsal root 
2. Autonomic 
1. N/A
2. Efferent 
1. Somatic 
1. Spinal cord  ventral roots  brachial plexus 
1. Pectoral nerve  pectoralis muscle 
2. Axillary nerve  deltoid muscle
2. Autonomic 
1. Sympathetic 
1. IML  ventral roots  ventral rami of brachial plexus  white rami  cervical sympathetic ganglion  Ach synapse to postganglionic fibers  gray rami  
1. Cervical plexus  supraclavicular nerve  skin of upper shoulder 
2. Brachial plexus  
1. Pectoral nerves 
2. Axillary nerve