The "septum pellucidum" has been described since antiquity. Even though people such as Vicq d' Azyr (12) and Burdach (3) pictured the septal region in their drawings, the nuclei associa­ ted with the pellucidum--the septal nuclei--were not described until Meynert (10). Since Meynert's description, this portion of the limbic system has been troublesome in terms of nomenclature. Scientists about the turn of the twentieth century proposed quite diverse termin­ ologies. For example, Elliot Smith first wrote of the precommis­ sural area (4) and then later of the paraterminal body (5). These terms, however, were meant to extend beyond the septal nuclei of our understanding. Unger (11) and Herrick (8) proposed the familiar terms--nucleus lateralis septi and nucleus medialis septi; but again they were somewhat broader in definition than is accepted for current usage. These terms, however, were rejected by Johnston (9). In Johnston's great paper, he pointed out that the hippo­ campus seems to evolve out of large portions of the septal nuclei. It was appropriate then to borrow a term previously used by Elliot Smith (6), but in another context--primordium hippocampi. Johnston's primordium hippocampi corresponds to the lateral septal nucleus of current usage. He introduced the terms medial and lateral parolfactory area to refer to the remaining portions of the septal nuclei of Herrick (8). Hence, the lateral parol factory area refers to the nucleus accumbens septi of Ariens Kappers (2).

Septum Development in Primates.- Autoradiographic Studies of the Development and Connections of the Septal Area.- Acetylcholinesterase Histochemistry of the Septal Region in the Rat.- Organization of the Hippocampal-Septal Axis.- The Septo-Hippocampal System: Significance of the Subiculum.- Arterial and Venous Vessel Patterns in Rat Septal Structures.- Septal-Hypothalamic Relationships.- A Functional Analysis of the Septal Nuclei.- Unit Activity in the Septal Nuclei During Water Deprivation, Drinking, and Rehydration.- Functional Aspects of the Hippocampal-Septal Axis.- Septal Unit Responses to Hippocampal and Hypothalamic Stimulation in the Chloralose-Anesthetized or Cerveau Isolé Cat.- Cholinergic Enzyme Activity in the Septum and Related Brain Areas in Deceased Mentally Normal, Chronic Schizophrenic and Organic Brain Syndrome Patients.- A Neuroendocrinological Approach to the Investigation of Septum.- The Effects of Ablation of the Septal Nuclei in the Rat on Circadian Variation and Stress Response Pattern of Corticosterone, Growth Hormone and Prolactin.- Plasma Corticosterone Levels During Active Avoidance Learning in Rats with Septal Lesions.- Behavioral Functions of the Septum: A Re-Analysis.- Behavioral Correlates and Firing Repertoires of Neurons in Septal Nuclei in Unrestrained Rats.- Topographic Patterns of Hippocampal Theta Rhythm in Freely Moving Rat and Rabbit.- Immediate and Long-Term Effects of Septal and Frontal Ablations on the Species-Typical Behavior of the Rat.- Behavioral, Anatomical, and Biochemical Aspects of Septal Hyperreactivity.- Program.- Participants.