Fig. 1.     A-F: Series of drawings made from coronal sections through a rat brain (rostral to caudal) that have been immunostained for ChAT, illustrating the distribution of cholinergic neurons (dots). Striatal cholinergic neurons (including those in the ventral striatum) have been omitted for simplicity. Adjacent sections were Nissl counterstained and/or immunostained for GAD to aid in the delineation of nuclear and regional borders. Approximate distance from bregma in mm. A-F: +0.5, +O.1, -0.4, -1.0, -1.9, -3.1.