Figure 1.
Subtypes of nicotinic acetylcholine receptors present in brain, autonomic ganglia, and the neuromuscular junction. Compounds designed to preferentially activate the given subtypes are discussed in the text. The anatomical locations are
based on agonist-induced physiological responses. “Effects” given in green represent the beneficial actions of nicotinic receptor
agonists, whereas “effects” in red represent undesirable actions or side effects. The colorcoding of receptor subunits does
not represent actual subunit stoichiometry within given receptor type. (CTZ, chemoreceptor trigger zone.)