| The nurse takes special care when abducting the legs to prevent injuring the patient's femoral, obturator, and sciatic nerves. |
| The remainder of the ischium, joins with the pubis to form the obturator foramen. |
| Accessory fasciculi may unite the pectineus with the obturator externus, the iliacus, the capsule of the hip, or the lesser trochanter. |
| The femoral, lateral cutaneous, and obturator nerves exit from the lumbar plexus. |
| The obturator artery is very variable in origin and no embryological explanation has been found. |
| The nerve supply of the knee comes from the tibial, common peroneal, femoral, and obturator sources. |
