Limbs Foot Pathway Notes

1. Pathways to the Foot 
1. Blood Supply 
1. Aorta  descending aorta  common iliac  external iliac  through femoral sheath  femoral artery  popliteal  
1. Anterior tibial artery  dorsalis pedis artery  dorsum of foot 
2. Posterior tibial artery  plantar arteries  plantar aspect of foot 
2. Blood Drainage 
1. Medial foot  great saphenous vein  femoral vein  external iliac  common iliac  IVC 
2. Lateral foot  lesser saphenous vein  popliteal  femoral  external iliac  common iliac  IVC
3. Nerve supply 
1. Afferent 
1. Somatic 
1. Dorsum of foot skin and muscles  superficial and deep peroneal nerves  common peroneal  sciatic nerve  over piriformis muscle  through greater sciatic foramen lumbosacrial plexus  L4-S3  posterior division  dorsal roots  spinal cord
2. Autonomic 
1. N/A
2. Efferent 
1. Somatic 
1. Spinal cord  ventral roots of lumbar/sacral plexus  sciatic nerve  
2. Anterior division  tibial nerve  plantar nerves (flex toes)
3. Posterior division  peroneal nerve   
1. Superficial peroneal  dorsum of foot 
2. Deep Peroneal nerve  dorsum of foot 
2. Autonomic 
1. Sympathetic 
1. IML  ventral roots  ventral rami of lumbar/sacral plexus  white rami  Lumbar/sacral plexus of sympathetic ganglion  Ach synapse to postganglionic fiber  gray rami  lumbar sacral plexus  
1. Sciatic nerve posterior division  common peroneal nerve  dorsum of foot 
2. Sciatic nerve anterior division  tibial nerve  plantar nerves  plantar of foot