Mid-sagittal T2w image of the rabbit brain: the midline area of the caudal cranial fossa was defined as the area limited caudally by the foramen magnum and cranially by the rostral contour of the cerebellum and the dorsum sella turcica. The midline area of the cranial cranial fossa included the olfactory bulb, following the dorsal brain surface until the caudal pole, then following the tectum mesencephali to the dorsum sella turcica, going rostrally to the olfactory bulb again, including the pituitary gland and the optic chiasm