The hippocampus is so-named because of its resemblance to a sea horse. Previously noted by other writers, it was described by Johann Christian Reil in 1809. Medial lemniscus, lateral lemniscus. Relating or resembling a lens. Shaped like a nipple.
Mamillary bodies are nipple-like elevations from the surface of the diencephalon.
The middle or marrow of bone. Gr. mesos, middle, enkephalos, brain. The mid-brain between the pons and thalamus. Relating to occiput. Related to or causing movement of the eye.