The comparative neuroanatomist Judson Herrick (1868-1960) postulated that the medial cortex (Broca's Limbic Lobe) was architectually distinct from and far older than the lateral cortex.
Herrick suggested that the medial cortex was associated with more primitive aspects of feeding and sex, while the lateral cortex mediated "higher" order mental activities.
The Epithalamus is involved in connecting the forebrain limbic structures with other parts fo the brain.
In humans, the Epithalamus resides in the posterior dorsal region of the diencephalon and consists of the Habenular Nuclei, the Posterior Commisure, and the Pineal Gland.
The Epithalamus is connected to the midbrain Interpeduncular Ganglion and the brainstem Raphe Nuclei via the Habenular-Interpenduncular Tract.
The Epithalamus is connected to the Septal Nucleus, Basal Ganglia, and Hypothalamus via the Stria Medullaris Tract.