<prompt> Which of the following is not true about facial nerve its relationsProcessus cochleariformis acts as a landmark for geniculate ganglion of facial nerveTympanic segment of facial nerve lies below round window above horizontal semi circular canalMastoid segment of facial nerve lies always behind tympanomastoid sutureA patient with lesion between geniculate ganglion nerve to stapedius will have phonophobia loss of stapedial reflex taste sensation  <response>: Tympanic segment of facial nerve lies Above oval window Below Horizontal SCC FOR MIDDLE EAR AND MASTOID SURGERY Processus cochleariformis- It demarcates geniculate ganglion which lies just anterior to it. Tympanic segment of the nerve stas at this level. Oval window and horizontal canal- Facial nerve runs above oval window stapes and below the horizontal canal. Sho process of incus- Nerve lies medial to sho process of incus at level of aditus. Pyramid-Nerve runs behind the pyramid and the posterior tympanic sulcus. Tympanomastoid suture- In veicalmastoid segment, nerve runs behind this suture. Digastric ridge- Nerve leaves the mastoid at the anterior end of digastric ridge. 