Limbic System Anatomy

Where is limbic system located?

bw diencephalon and telencephalon, mainly rhinencephalon

Function of limbic system

olfactory, emotion, motivation, learning + memory

Function of hypothalamus (main part of limbic system)

emotional behaviour, through vegetative and endocrine reactions

Neocortex has which limbic system structures?

cingular and parahippocampal gyri

Paleocortex has which limbic system structures?

subcaallosal gyrus, area subcallosal, enthorinal area

Archicortex has which limbic system structures?

hippocampal formation, dentate gyrus, subiculum

Nuclei of telencephalon

amygdaloid, septum pellucidum, accumbens septi, basal nucleus

Nuclei of diencephalon

ant thalamic, ld, md, non-specific thalamic, mammilary body, habenula

Nucleus of mesencephalon

interpeduncular

Orbito-frontal association area of limbic system - function

control of emotional response and olfactory discrimination

Cingulum (in relation to limbic system)

association fascicle of limbic system

Fasciculus uncinatus (in relation to limbic system)

association connection bw parahippocampal gyrus and septal area

Striae longitudinalis lat and med Lancisi (in relation to limbic system)

limbic fascicle, association fibers of rhinencephalon

Fornix (in relation to limbic system)

association and projection band bw telencephalon and diencephalon

Where does precommisural tract of fornix end?

septal area and ant nuclei of hypothalamus

Where does postcommisural tract of fornix end?

mammilary body

Mammilothalamic tract Vicq d'Azyr (in relation to limbic system)

jxn bw mammilary body nuclei and ant thalamic nuclei

Median forebrain bundle (in relation to limbic system)

connection bw limbic system, basal prosencephalon and brainstem

Anterior commissural fibers

connect olfactory lobes, amygdaloid complex and parahippocampal gyrus

Parahippocampal commissural fibers

connects 2 hippocampal formations

Habenular commissural fibers

connects habenular nuclei

Perforating association fibers

connects enthorinal cortex and hippocampus

Afferences of limbic system

thalamic peduncle, olfactory lobe, median forebrain bundle

thalamo-cingular fibers

from sensitive and sensorial systems

Median forebrain bundle is from

reticular formation

Efferences of limbic system

hypothalamus, extrapyramidal system, reticular formation and supralimbic neocortex

Extrapyramidal system

thru amygdaloid-hypothalamo-habenular circuit

Supralimbic neocortex

by association efferences of limbic lobe, for conscious perception of emotional behaviour