<prompt> Sphenopalatine foramen opens in which wall of pterygopalatine fossa?Medial wallLateral wallSuperior wallInferior wall  <response>: The pterygopalatine fossa is a small pyramidal space inferior to the apex of the orbitThe pterygopalatine fossa communicates to:DirectionPassageConnectionPosteriorlyforamen rotundummiddle cranial fossaPosteriorlypterygoid canal Vidianmiddle cranial fossa, foramen lacerumPosteriorlypalatovaginal canal pharyngealnasal cavitynasopharynxAnteriorlyinferior orbital fissureorbitMediallysphenopalatine foramennasal cavityLaterallypterygomaxillary fissureinfratemporal fossaInferiorlygreater palatine canal pterygopalatineoral cavity, lesser palatine canals 