Cortical Structures of the Limbic System
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Transcript of Cortical Structures of the Limbic System
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Cortical Structures of the Limbic System
Most notable structures Primary functionOrbitofrontal gyri Very diverseCingulate gyrus EmotionIsthmus Emotion + MemoryParahippocampal gyrus Memory Uncus Olfaction
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Subcortical Structures of the Limbic System
Most notable structures:Septal nucleiNucleus accumbensMammillary bodyAmygdalaDorsal thalamusHabenulaHippocampal formation
Most notable efferent pathways:FornixStria terminalisVentral amygdalofugalMammilothalamic
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Hippocampal Formation
Afferent PathwaysPerforant
AlvearFornix
Efferent PathwaysFornix
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Amygdaloid Complex
Afferent PathwaysCingulum
Stria TerminalisLateral oflactory stria
Efferent PathwaysStria TerminalisAmygdalofugal
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Septal Nuclei & Nucleus Accumbens
Septal PathwaysMFB (A&E)
Stria terminalis (A)Fornix (A&E)
Stria medullaris (E)
Nuc. Acc. PathwaysMFB (A&E)
Stria terminals (A)Fornix (A)
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Learning and Memory
Associative Learning Formation of associations between 2 features in the environment
Nonassociative LearningExperience produces changes in the magnitude of the response
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Hebb’s Postulate:
Cells that fire togetherwire together; Cells thatfire out of sync lose theirlink
Cellular Mechanisms of Memory
Long-Term Potentiation Enhancement of synaptic efficacy following strong stimulation