Extended Data Fig. 1: Histological verification of fibre placement in Area X.
From: Natural behaviour is learned through dopamine-mediated reinforcement
a, Schematic from the zebra finch atlas. Adapted from ref. 18 (Wiley). Orange dashed lines indicate the intended placement of the cannula in Area X. b, Example brain slice showing fibre placement (purple dashed circle, Area X; orange dashed lines, fibre placement).
