the analysis of the sensitivity of epsps and ipsps to high frequency optic nerve stimulation shows that monosynaptic as well as polysynaptic epsps can be recorded from cells in the non-retinorecipient tectal region , a number of ganglion and pyramidal cells receive a direct retinal excitatory input as their dendrites pass through the region of optic endings , most ipsps are polysynaptic , some cells located in the retinorecipient region may receive direct retinal inhibitory connections .
C0015392
optic
C0035298
retinal