Animals receiving whole tissue transplants display a correlation between dopamine cell numbers and rotation bias.

<p>Each data point represents the number of TH+ cells from a single host (y-axis) versus their rotation score (x-axis). Note (A) how there is no correlation between the number of TH+ cells in dissociated cells transplants and their rotation scores (r² = 0.0006), while there is (B) a significant inverse correlation between the number of TH+ cells and ipsilateral rotation in animals receiving transplants of intact pieces of VM tissue (r² = 0.306; p = 0.04).