Afferent is the term for conducting towards a structure while efferent is the term for conducting away from a structure.
Inferior is the medical term meaning toward the lower parts of the body.
Anterior is a term meaning situated at or toward the front. Frontal may also be used.
Toward or nearest the middle/midline is MEDIAL
Posterior.
Proximally
The medical term you are looking for is "posterior." This term refers to the back side of the body or something positioned behind a particular structure.
A movement toward the midline is called adduction. Adduct means to bring towards the center. The opposite, "abduction" is moving away from midline.
Inferior or caudal mean toward the lower part of the body.
caudalposterior is toward the back, but caudal is toward the tail
Ventricul- is the medical terminology combining form meaning ventricle.
MedialMedio = middle-al = pertaining toMedial = pertaing to the middleMedial
Pertaining to going toward the front part = AnteriorlyPertaining to going toward the back part = PosteriorlyPertaining to going toward the side = LaterallyPertaining to going toward the middle = mediallyDorsal or posteriad