Limbs Thigh Pathways Notes

1. Pathways to the Thigh 
1. Blood Supply 
1. Aorta  descending aorta  common iliac  external iliac  femoral sheath  femoral  deep femoral  thigh muscles 
2. Blood Drainage 
1. Femoral vein and Great saphenous vein  femoral sheath  external iliac  common iliac  IVC 
3. Nerve Supply 
1. Afferent 
1. Somatic 
1. Upper anterior thigh  femoral branch of genitofemoral nerve  genitofemoral nerve  lateral to femoral sheath and behind the inguinal ligament  lumbar plexus  L12  dorsal roots  spinal cord 
2. Anterior thigh  femoral nerve  L234  dorsal roots  spinal cord 
3. Medial thigh  obturator nerve L234  dorsal root  spinal cord 
4. Lateral thigh  lateral femoral cutaneous  L23 dorsal root  spinal cord 
5. Posterior thigh  posterior cutaneous nerve of the thigh  S123  dorsal root  spinal cord 
2. Autonomic 
1. N/A
2. Efferent
1. Somatic 
1. Lumbar spinal cord  ventral roots  LS plexus  
1. Sciatic nerve  posterior muscles 
2. Obturator nerve  skin of the medial thigh and adductor muscles 
3. Femoral nerve  muscles of the anterior thigh 
2. Autonomic 
1. Sympathetic 
1. IML  ventral roots  ventral ramus of LS plexus  white rami  LS plexus of sympathetic ganglion  Ach synapse  gray rami  LS plexus  same divisions as afferent except reversed and to the vasomotor of skin and muscles of thigh