OFF center cells are hyperpolarized by the same stimuli. Both cell types repolarize by light stimulation of the peripheral receptive field outside the center. Some bipolar cells postsynapticaly are only cones, some are only rods while other can receive input from both rods and cones. Different bipolar cell types express different glutamate receptors. The axon terminals of bipolar cells can be either monostratified or mulistratified. The cells are also differentiated into midget or diffuse type based on the extent of the dendrite tree. Midget bipolar cells interact with once cone while diffuse cells interact with many cones. The location of the dendrite tips also differentiate the bipolar cells. Flat tips are located on the surface of photoreceptor synaptic terminals. Invaginating cells penetrate the photoreceptor synaptic terminal and approach the presynaptic ribbons
OFF center cells are hyperpolarized by the same stimuli. Both cell types repolarize by light stimulation of the peripheral receptive field outside the center. Some bipolar cells postsynapticaly are only cones, some are only rods while other can receive input from both rods and cones. Different bipolar cell types express different glutamate receptors. The axon terminals of bipolar cells can be either monostratified or mulistratified. The cells are also differentiated into midget or diffuse type based on the extent of the dendrite tree. Midget bipolar cells interact with once cone while diffuse cells interact with many cones. The location of the dendrite tips also differentiate the bipolar cells. Flat tips are located on the surface of photoreceptor synaptic terminals. Invaginating cells penetrate the photoreceptor synaptic terminal and approach the presynaptic ribbons