Discovery of the Extended Amygdala

As just indicated the idea of a centromedial amygdala-bed nucleus of stria terminalis continuum, which originated with J. B. Johnston's pioneering studies almost a century ago, was quickly forgotten, in all likelihood because it proved difficult to identify and illustrate the attenuated cellular continuities between the centromedial amygdala and the bed nucleus of stria terminalis. An additional breakthrough was needed, and, as is often the case in neuroanatomy, it came with a histotechnical...

The Triune Brain Concept And The Controversy Surrounding It

MacLean suggested that a paleomammalian brain (represented by the limbic system, which according to MacLean is important in emotional behavior related to feeding, reproduction, and parental functions) was added in early mammals to the already existing reptilian brain (the basal ganglia, important for daily routines and ritual displays related to aggression, territoriality, and courtship). The evolutionary process was later followed in modern mammals by the development of the neomammalian brain...

Limits Topography And Related Concepts

Medial Limbic Lobe

As mentioned in previous chapters, Broca (1878), in a monumental effort entitled Le Grand Lobe Limbique, described the limbic lobe in numerous mammals. He drew attention to the ring or limbus of each hemisphere that encircles the brainstem and forms its medialmost edge or border. Attaching the term lobe was significant, since it gave this cortex status as a separate entity like other lobular subdivisions of the cortex that had arisen in earlier years of the 19th century and during the 18th...