Septohippocampal system

Vertes, R. P. Kocsis, B. (1997). Brainstem-diencephalo-septohippocampal systems controlling the theta rhythm of the hippocampus. Neuroscience 81, 893-926. 

Figure 9.7. Diagram illustrating the role of the septohippocampal system in...

The mesocortical system, in which the dopaminergic fibres also arise from the A10 region (the ventral tegmental area) and project to the frontal cortex and septohippocampal regions. 

Regarding the cholinergic system, there is evidence that the pathway from the substantia innominata to the cortex degenerates in Parkinsonism, and that the septohippocampal pathway is also functioning suboptimally. As more than 30% of Parkinsonian patients exhibit intellectual deterioration with deficits in cognitive function and memory, it is possible that these cholinergic deficits may account for at least some of the symptoms of parkinsonian dementia. 

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