[...]... Fissure The limbic convolution is circumscribed throughout its extent by the cortical epithetial border on one side, and the limbic fissure on the other 6 THE LIMBIC BRAIN They are: 1°above, the lobe of the corpus calleux [cingulate gyrus], which forms the superior arc ; 2° below, the hippocampal lobe, which form the inferior arc; 3° in front, the olfactory lobe which forms the base and in the manner... convolution The brainstem has been removed to better illustrate the gyrus fornicatus throughout its course The divisions of the hypothetical limbic fissure are discussed in the text Figure from Duvernoy (10) THE LIMBIC BRAIN 8 runs above and parallel to the corpus callosum In primates the intercalary and genual sulcus are linked as the cingulate sulcus (aka callosalmarginal sulcus, this aspect of the limbic. .. brain anatomy, see Table 1 In the following two citations Broca draws our attention to the cortical limbus (cortical epithelial margin) dubs the larger convolution that embraces the cortical limbus as the limbic convolution, and introduces the term limbic fissure: these are the distinctive features listed in the first table The cerebral mantle covers all of the hemisphere with the exception of a very circumscribed... neuroanatomic research on the limbic brain at mid century then surely it was the extension of anatomic borders of limbic system to even further rostral and caudal domains of the neuraxis Spearheaded by Walle Nauta, the limbic consortium would expand further to embrace more firmly both neocortical and midbrain structures In this chapter we explore Nauta’s concept of the limbic midbrain and examine his views... a limbic system, criticized the visceral or limbic brain concept as theoretically too vague and cumbersome In a recent review of the limbic system, Swanson points to Brodal’s criticism that the discovery of connections of limbic structures with virtually all parts of the nervous system render the concept of the limbic system useless, and better abandoned Additional dissatisfaction surrounding the limbic. .. hence the word lobe does not sufficiently characterize it Therefore I call it the great limbic lobe.” (Broca, p 394 Broca’s emphasis) Trans by Schiller, p 258, 1992 Broca’s decision to embrace a rather robust limbic lobe construct, extending out to the limbic fissure (including the entire gyrus fornicatus, and thus 12 THE LIMBIC BRAIN Figure 1.7A Cross-section of the temporal lobe at the level of the. .. consecutive turns The folds become tighter as one approaches the epithelial margin of the hemisphere.” (9, p 326) The cortical epithelial border, the cortical limbus, is a canonical element in the tale of limbic brain anatomy Broca appears to have well appreciated it referring to this border as the opening into the inner recesses (lateral ventricles) of the hemisphere, As it surrounds the threshold of the hemisphere... at the tentorial surface of the hemisphere 6 ) The collateral sulcus in turn is continued by the final component, the rhinal fissure Continuity of the collateral sulcus with the rhinal sulcus is commonly but not always encountered, see discussion by Gloor (9, p 329) limbic Convolution The annular ring of tissue on the medial face of the cerebral hemisphere enclosed by the limbic fissure consists of the. .. recapitulate the process of exploration, discovery, and understanding as it relates to one of these principle hemispheric domains The Strange, Natural Beauty of this Neural Landscape: The neural terrain surrounding the epithelial margin of the hemisphere (Broca referred to this cortical limbic area as the threshold of the hemisphere) has engaged the interest of anatomists for the last two centuries The following... racket handle forms the anterior aspect of the lobe The anterior part of the olfactory lobe is free below the anterior extremity of the hemisphere, the rest of the great lobe is circumscribed by a fissure which separates it and the cerebral convolutions and I call it the limbic fissure.” (1) pp 399–400, emphasis added DISTINCTIVE FEATURES OF LIMBIC LOBE ANATOMY: A CLOSER EXAMINATION In the following two . Nauta’s Limbic Midbrain 99 Nauta’s Limbic Midbrain: Introduction 99 The Concept of the Limbic Midbrain Area 100 Nauta’s Limbic Midbrain: Methods; Finding; Pathways 103 The Medial. neuroanatomic research on the limbic brain at mid century then surely it was the extension of anatomic borders of limbic system to even further rostral and caudal domains of the neuraxis. Spearheaded. surrounding the epithelial margin of the hemisphere (Broca referred to this cortical limbic area as the threshold of the hemisphere) has engaged the interest of anatomists for the last two