“…Wainer, Levey, Rye, Mesulam, and Mufson (1985), by double staining (immunocytochemical localization of choline acetyltransferase reactivity combined with retrograde transport of horseradish peroxidase), have established that the septohippocampal pathway is only about 50% cholinergic. Nonetheless, performance of the representational memory-dependent task has been found to be very sensitive to anticholinergic drugs such as scopolamine and atropine (Brito, Davis, Stopp, & Stanton, 1983; Kasckow, Thomas, & Herndon, 1984; Messer, Thomas, & Hoss, 1983; Ordy, Thomas, & Dunlap, 1982), and, in contrast, performance on a dispositional memory-dependent task is relatively insensitive to scopolamine (Brito et al, 1983).…”