LIMBIC –> Border/ Girdle. derived from limbus meaning RING.
Previously called Rhinencephalon due to its relation to olfaction.
Apart from Olfaction, it plays important roles in behaviour, emotion,motivational drives, memory as well as regulation of visceral functions –> Hence referred as –> VISCERAL BRAIN
Limbic system is not a separate structure. It refers to a ring of Fore brain structure that surrounds the basal region of cerebrum and brain-stem and their intercommunicated Neural Pathways. Limbic system is the link between brain-stem and neocortex. there is extensive to and fro connections among different structures.
FIRST IDENTIFIED BY PAUL BROCA, 1978
ANATOMY / COMPONENTS OF LIMBIC SYSTEM
Initially described by JAMES PAPEZ ( 1937) called PAPEZ CIRCUIT
This circuit was subsequently modified by – McLEAN (1955).
Extensive to and fro connections are found among various components. This circuit is responsible for resting EEG & for those emotions and aspects of behaviour that are related to preservation of the individual and species.
Characteristic features of LIMBIC SYSTEM CONNECTIONS are :
FUNCTIONS OF LIMBIC SYSTEM
- KLUVER – BUCY SYNDROME
- KORSAKOFF PSYCHOSIS