We are carrying out a study about the
synaptic relations between identified synaptic profiles in
the dorsal lateral geniculate nucleus (dLGN) of the
rabbit. Here. the types of synaptic vesicle containing
profiles of the dLGN are described. There are
presynaptic large profiles containing round vesicles and
pale mitochondria (RLP terminals) and small profiles
that contain round vesicles and dark mitochondria (RSD
termiilals) which respectively arise from the retina and
the visual cortes. Another type of presynaptic profile
contains elliptical vesicles (F-boutons) which can be
subdivided according to their cytoplasmic content. These
F-boutons arise from dLGN interneurons. We have found
different sized vesicles that have a dense core within
RLP, and F terminals rind a possible RSD terminal. The
significance of the coesistance of pale and dense cored
vesicles in the presynaptic profiles of the rabbit dLGN is
discussed