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The Limbic System Notes

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This is an extract of our The Limbic System document, which we sell as part of our Neurology Notes collection written by the top tier of Bristol University students.

The following is a more accessble plain text extract of the PDF sample above, taken from our Neurology Notes. Due to the challenges of extracting text from PDFs, it will have odd formatting:

Lecture 41 The Limbic System



The Limbic Lobe (Broca, 1878) o Cingulate gyrus o Uncus (bump on parahippocampal gyrus) o Hippocampus o Parahippocampal gyrus (medial surfaces of temporal lobe) Circuit of Papez o Original model





? Hippocampal fibres go via fornix to mammillary bodies of hypothalamus
? MB project via mammillothalamic tract to anterior thalamic nuclei (AT)
? Fibres from AT project to cingulate gyrus via internal capsule
? White matter pathway; cingulum bundle from cingulate cortex to parahippocampal gyrus and then to hippocampus Function
? Thought to principally be involved in emotional processing but is NOT
? Expanded to include

* Septal Nuclei

* Ventral striatum

* Prefrontal cortex

* Amygdala
? Structure in circuit critical for MEMORY not emotion Present model

The Limbic system o Components (diverse set of cortical & subcortical structures; medial & ventral)
? Prefrontal cortex
? Parahippocampal gyrus; Hippocampus
? Septal nuclei and nucleus accumbens
? Amygdala
? Hypothalamus
? Thalamus

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