What does dorso, ventro, and orbital mean in prefrontal cortext? The prefrontal cortex has 3 parts:


Dorso prefrontal cortex 
Ventro prefortal cortex
Orbital prefrontal cortex


What does dorso, and ventro mean?

I thought orbital means back?
Those are anatomical terms of location.

The orbits are the cavities in the skull that hold the eyes. You can easily remember this if you remember that an orbit, in English, is a circular object or path: the Moon orbits the Earth. So


"orbito-" means "towards the eyes", i.e. on the underside of the prefrontal cortex


In a four footed animal like a dog or horse


dorsal means towards the back (i.e. where a rider would sit on a horse)
ventral means towards the belly (underside)


Because human beings no longer walk on all fours, their neuraxis is bent, with the bend between the brain stem and the diencephalon:


in the torso and old brain parts, dorsal means towards the back, ventral towards the belly and face
in the cerebrum and diencephalon, dorsal means towards the top, ventral towards the bottom of the skull


Here is an illustration ("oder" means "or" in German):



I find English a bit confusing as to what the word "back" denotes. In other languages, like Latin, the words for the spinal side of the torso (dorsum, back) and the tail end of the body (posterior, back) are distinct. In English, they are the same, and this makes an explanation of these anatomical terms confusing in English.