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. Author manuscript; available in PMC: 2014 Jan 15.
Published in final edited form as: Neuroscience. 2012 Nov 14;229:55–70. doi: 10.1016/j.neuroscience.2012.10.069

Figure 7. Structural persistence following transport depletion.

Figure 7

A) Electron micrograph of sagittal section through superficial SC from a 12 mo DBA/2J shows axon terminals from RGCs (RLP), intracollicular inhibitory neurons (F), and cortico-collicular projections (RSD) in proximity to a collicular relay neuron (dashed line) and dendrites (D). For definitions, see Calkins et al. (Calkins et al., 2005). Many terminals contain intact presynaptic active zones (arrowheads). B) A 15 mo DBA/2J colliculus also contains intact RLP terminals with some synapses to dendrites. Terminals near a degenerating RLP (*) appear slightly dystrophic.