Petrus Paulus Steyn, MD 
Fellow, Department of Anesthesiology and Critical Care Medicine
Children's Hospital of Philadelphia

A 6-month old boy with isolated cleft palate repair  presents for surgical repair by the plastic surgery team. His mother is well prepared for the preoperative conversation and asks that her boy’s anesthesia team use an opioid sparing technique. The patient has a 1x1cm congenital melanocytic nevus under his left eye. You elect to do a suprazygomatic maxillary nerve block. After inducing the patient with sevoflurane, placing an IV and securing the airway with an oral right angle endotracheal tube, you obtain an image of the pterygopalatine fossa with a linear probe positioned bellow the zygomatic arch.

Please choose the option that most correctly represents the anatomical structures identified on this ultrasound imaging of the pterygopalatine fossa.