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. Author manuscript; available in PMC: 2012 Feb 1.
Published in final edited form as: Eur J Neurosci. 2010 Dec 31;33(3):433–443. doi: 10.1111/j.1460-9568.2010.07537.x

Fig. 1.

Fig. 1

Photomicrographs of sagittal sections immunostained for ChAT. A: A low magnification view shows a large number of ChAT+ neurons in the PPN. The STN contains a dense plexus of ChAT+ fibers, and ZI contains a moderate number of ChAT+ fibers. The SNc also contains a moderate number of ChAT+ fibers, while the SNr contains very few. B: A high magnification view of ChAT+ fibers in the STN. Thin ChAT+ fibers with numerous small boutons en-passant run from the caudodorsal to rostroventral direction. C: Electrical lesions of the midbrain tegmentum extending from the deep layers of the superior colliculus to the SNc greatly reduced the ChAT+ fibers in the STN and ZI. See Abbreviations list for the abbreviations used in this and subsequent figures.