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. Author manuscript; available in PMC: 2009 Jul 28.
Published in final edited form as: J Comp Neurol. 2005 Oct 31;491(4):305–319. doi: 10.1002/cne.20694

Figure 5. Position of RGC axons in the delta of the Optic Tract as a function of retinal origin.

Figure 5

Axons originating from dorsal (A) or ventral (C) retina travel in lateral or medial optic tract, respectively, whereas axons from nasal (D) or temporal (B) retina show a broader, more central distribution.. The target zone in ventral LGN is visible in A and D. E. Distribution of label in the optic tract for ventral (red, n=4) and dorsal (blue, n=3) injections. Dorsal (blue) injections are lateralized, ventral (red) injections are in medial optic tract. F. Distribution of label in optic tract for nasal (red, n=2) and temporal (blue, n=4) injections. No difference in the distribution of label in the optic tract for the nasal (red) and temporal (blue) injections is apparent. G. Quantification of axon order in optic tract. Position of the center-of-mass of labeled axons for the four ‘polar’ retinal injection locations. Injections in the dorsal retina (SR sector 2; green bar) result in label that is much more (P<0.001) lateralized than injections into ventral retina (IR sector 14, red bar). No difference in label distribution is seen for nasal (MR sector 8, light blue) and temporal (LR sector 20, dark blue) injections, but the center of mass of label for the nasal and temporal injections is different than the either the dorsal or ventral injections (P<0.01). 200 μm scale bar in A applies to all panels.