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Cortical Structures of the Limbic System. Most notable structures Primary function Orbitofrontal gyri Very diverse Cingulate gyrus Emotion Isthmus Emotion + Memory Parahippocampal gyrus Memory Uncus Olfaction. Subcortical Structures of the Limbic System.

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cortical structures of the limbic system
Cortical Structures of the Limbic System

Most notable structuresPrimary function

Orbitofrontal gyriVery diverse

Cingulate gyrus Emotion

Isthmus Emotion + Memory

Parahippocampalgyrus Memory

Uncus Olfaction

subcortical structures of the limbic system
Subcortical Structures of the Limbic System

Most notable structures:

Septal nuclei

Nucleus accumbens

Mammillary body

Amygdala

Dorsal thalamus

Habenula

Hippocampal formation

Most notable efferent pathways:

Fornix

Striaterminalis

Ventral amygdalofugal

Mammilothalamic

hippocampal formation
Hippocampal Formation

Afferent Pathways

Perforant

Alvear

Fornix

Efferent Pathways

Fornix

amygdaloid complex
Amygdaloid Complex

Afferent Pathways

Cingulum

StriaTerminalis

Lateral oflactorystria

Efferent Pathways

StriaTerminalis

Amygdalofugal

septal nuclei nucleus accumbens
Septal Nuclei & Nucleus Accumbens

Septal Pathways

MFB (A&E)

Striaterminalis (A)

Fornix (A&E)

Striamedullaris (E)

Nuc. Acc. Pathways

MFB (A&E)

Stria terminals (A)

Fornix (A)

slide6

Learning and Memory

  • Associative Learning
    • Formation of associations between 2 features in the environment
  • Nonassociative Learning
    • Experience produces changes in the magnitude of the response
slide7

Cellular Mechanisms of Memory

  • Hebb’s Postulate:
  • Cells that fire together
  • wire together; Cells that
  • fire out of sync lose their
  • link
  • Long-Term Potentiation
  • Enhancement of synaptic efficacy following strong stimulation