Limbic System Anatomy

Describe limbic system under following heads

1. Limbic System Characteristics,
2. Limbic System Components,
3. Limbic System Connections,
4. Limbic System Functions, and
5. Limbic System Applied anatomy.

Body Fluids	Muscle Physiology	Digestive System
Endocrinology	Face Anatomy	Neck Anatomy
Lower Limb	Upper Limb	Nervous System

Read And Learn More: Anatomy Important Question And Answers

1. Limbic System Characteristics:
   • It is situated at the Limbus (junction) of diencephalon and telencephalon.
   • It Integrates olfactory, visceral and somatic information

1. • Limbic System Makes homeostatic response for short term and long term.
   • The homeostatic includes Behavioural and Imotional response.
   • It consists of Core of archicortex, paleocortex.
     
2. Limbic System Limbic System Components
   • Archicortex consists of hippocampal formation which includes
     • Cingulate gyrus,
     • Hippocampus,
     • Dentate gyrus,
     • Splenial gyrus, indusium griseum, and
     • Longitudinal stria (white matter in the indusium griseum).
   • Paleocortex
     • Olfactory nerves and olfactory bulb,
     • Olfactory tract,
     • Olfactory striae,
     • Pyriform cortex (olfactory cortex) septal area (medial olfactory area), and
     • Septal nuclei.
3. Limbic System Connections
   • Afferents to
     • Pyriform area,
     • Septal area,
     • Hypothalamus, and
     • Tegmentum of midbrain.
   • Efferents to
     • Hippocampus,
     • Fornix,
     • Hypothalamus, and
     • Cortical areas of frontal lobe.
4. Limbic System Functions: The functions of the limbic system are not exactly known. However, the following functions are attributed to the system.
   • Limbic System is responsible for emotional reactions with respect to preservation of individual and the species.
   • Limbic System integrates olfactory, visceral and somatic impulses reaching the brain.
   • Limbic System controls visceral functions associated with emotions.
   • Limbic System is suggested that for retaining recent memory, functioning of the parts of limbic system and their connections are necessary.
5. Limbic System Applied anatomy: A lesion of limbic system results into following manifestations.
   • Psychomotor seizures: It is presented as occasional attacks of violent behaviour, which are not remembered by the patient. In between the attacks, the patient is normal.
   • Uncinate fits, consisting of attacks of olfactory hallucinations.
   • Unreal fear: The patient gets attacks in which he is afraid of non-existent conditions. He has a feeling of unreality, as if he is in a dream.
   • De ja vu or seen it before phenomenon: The patient may get an unreal feeling of familiarity with an object, or an event and feels as if he has experienced it before.
   • Automatism: Paroxysmal attacks in which the patient automatically performs complex activity, without being aware of what he is doing. Later, on recovery from the attacks, he does not remember anything about it.