Fig. 3

T1-weighted postmortem MRI images of the head of the stillborn Indo-Pacific bottlenose dolphin. a, general sagittal plane; b, coronal plane at the level of the red dotted line of a with the white arrows indicating the cerebrospinal fluid; c, higher magnification of showing the spongy tissue (st) with the white arrows indicating the medulla oblongata; d, transverse plane at the level of the middle and inner ear with the arrowheads pointing at the vestibulocochlear nerve; e, transverse plane at the level of the eyes and optic nerves; f, higher magnification of e with white arrowheads pointing at the optic nerves and the red arrowheads pointing at the retina. ac, area cerebrovasculosa; ob, medulla oblongata