<prompt> Mandibular nerve exits the cranial cavity by passing throughFormanen rotundumForamen lacerumStylomastoid foramenForamen ovale  <response>: Mandibular nerve begins in the middle cranial fossa through a large sensory root and a small motor root. The sensory root arises from the lateral pa of the trigeminal ganglion and leaves the cranial cavity through the foramen ovale. Ref: BD Chaurasias HUMAN ANATOMY, Volume 3, 4th edition. 