The vast majority of synapses in the mammalian nervous system are classical axo-dendritic synapses ( axon synapsing upon a dendrite ), however a variety of other arrangements exist.
22.
The tract forms on the ventrolateral surface of the brain and passes through the AON, continuing on to run the length of the piriform cortex, while synapsing in both regions.
23.
Neurons of the dorsal column nuclei send axons that form the internal arcuate fibers, decussating ( crossing to the opposite side ) to form the medial lemniscus, ultimately synapsing with third-order neurons of the thalamus.
24.
One division leaves on the zygomatic division of CN V 2 and travels on a communicating branch to unite with the lacrimal nerve ( branch of the ophthalmic nerve of CN V 1 ) before synapsing at the lacrimal gland.
25.
This ramus then enters the spinal nerve and is sent to its synapsing target, or becomes a visceral branch to enter a plexus ( e . g . the superficial or deep cardiac plexuses ), or synapses directly onto a target.
26.
M-and P-cells receive relatively balanced input from both L-and M-cones throughout most of the retina, although this seems to not be the case at the fovea, with midget cells synapsing in the P-laminae.
