as it has been demonstrated microscopically , the corticofugal fibers in the aii and ep zones of the auditory cortex in all the auditory subcortical centers ( medial geniculate body , posterior colliculi of the tectum mesencephali and the superior olive nuclei ) terminate by means of single axodendritic synapses , having an asymmetrically active zone , and mixed ( by their form ) synaptic vesicles .
C0021358
posterior colliculi
C0039433
tectum mesencephali