Primary neurons isolated from Substantia Nigra, stained green for Tyrosine, blueish-purple for nuclei, and red for double cortin. The word "neuroplasticity" is in white, all caps, upper left corner.

Primary neurons isolated from the Substantia Nigra stained for Tyrosine Hydroxylase (green), nuclei (blue), and doublecortin (red). Image taken by D Feinstein July 2011, released into the public domain.