YFP expression in A11 neurons following Cre-dependent viral expression and retrograde tracing with FG from the spinal cord.

<p>Rostral region section of A11 from a TH-Cre mouse transduced with a Cre-dependent YFP AAV (green) and immunohistochemistry against FG (magenta) (A–D). Boxed inset in (B (b)) shows FG labeled cells in the motor cortex. Only cells in A11 were co-labeled with YFP and FG (C, D). Scale bars: 50 µm. D: Higher magnification of boxed area in A. Scale bar: 20 µm.