Which of the following is not true about facial nerve & its relations

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 veical/mastoid segment, nerve runs behind this suture. Digastric ridge- Nerve leaves the mastoid at the anterior end of digastric ridge.