Figure 4.

Morphological reconstructions of representative GFP+ neurons. A–L, Neurons were reconstructed in three dimensions using Neurolucida; cell bodies and dendrites are shown in green, axons in red. For ease of comparison, individual drawings were normalized to the same width of layer 4; average width of layer 4 was 240 ± 7.5 μm (mean ± SEM). The arrowheads in B–D point to a turning point of the axon, from the upper layers back to layer 4.