Limbic System Components

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Figure 18—39. Right side schematic drawing of components of the limbic system and their connections from a medial perspective. Cerebral cortex forms the outer rim of the limbic system (shown in red). Deeper telencephalic components (basal nuclei and hippocampus) are colored blue. Diencephalic nuclei are colored green and midbrain components are brown. Axonal tracts connecting limbic components include: cingulum (white matter within the cingulate gyrus), fornix (output from the hippocampus), stria terminalis (a major output of the amygdala), several diencephalic tracts (green) and various unlabled connections. The nucleus accumbens projects to motor nuclei in addition to sharing septal connections and rostral thalamic nuclei project to the cingulate gyrus. (Rost.Nuc = rostral thalamic nuclei; Mm – mamillary body; Hb = habenula; IP = interpeduncular nucleus; Ret For = reticular formation; and f. = fasciculus.)

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