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lancesadams
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The limbic system consists of what structures and their functions
- Hypothalamus - Homeostasis
- Olfactory cortex - Olfaction
- Hippocampus - Memory
- Amygdala - Emotion
- "HOME"
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What is the general purpose of the Limbic system
Preservation of the specie
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What nuclei in the Limbic system act as a relay station
- Anterior Nucleus of the Thalamus
- Dorsomedial Nucleus of the Thalamus
- Habenular Nucleus of the Epithalamus
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What is the Allocortex
- Portion of the cortex that contains only three layers
- - Archicortex (hippocampus)
- - Paleocortex (olfactory)
- "All kids named Archi are Pale"
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What is the Juxtallocortex or Periallocortex
- Portion of the cortex that contains only 4-5 layers instead of the normal 6
- - Entorhinal cortex
- - Parahippocampal gyrus
- - Cingulate cortex
- - Orbitofrontal cortex
- "COPE"
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What are considered the subcortical components of the Limbic System
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What is the role of the Amygdala
- Emotion and Drive
- Fight or Flight
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What does the Amygdala receive inputs from
- Visual cortex
- Auditory Cortex
- Somatosensory cortex
- Visceral cortex
- Hypothalamus
- Ect.
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Facial expressions of fear are controlled by
Amygdala
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Stimulation of the Amygdala has what effect
Aggression
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Removing or creating a lesion of the Amygdala produces
- Kluver-Bucy Syndrome
- Wild and aggressive animals become placid, display hyper- and inappropriate sexual behavior
- Placing feces and other inappropriate items in their mouth only recognizing them after tasting them
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What is the primary function of Cholinergic (Acetylcholine) neurons in the CNS
Attention, Learning, & Memory
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Blocking cholinergic projections through drugs causes what effects
Delirium and memory problems
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What is the Papez circuit
- Hippocampus
- Forinx
- Mammilary Bodies
- Anterior Nucleus of the Thalamus
- Cingulate Cortex
- Parahippocampal gyrus
- Entorhinal Cortex
- Hippocampus
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In the Papez circuit, what is the projection that circumvents the Fornix
- Hippocampus
- Parahippocampal Gyrus
- Hippocampus
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What is considered the decision center
Hippocampus
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Neocortex
The normal 6 layer cortex, makes up 95% of the brain
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The Ventral Tegmental Area is found to trigger what type of responses
- Love (Romantic)
- Addiction
- Motivation
- Eupohoria
- "TV is LAME"
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What midbrain reticular formation nuclei are considered to be part of the Limbic midbrain area
- Ventral tegmental area
- Interpeduncular nuclei
- Others that are directly connected limbic structures or influenced by the Hypothalamus
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The Limbic system has an important function in normal memory in what respect
It identifies certain events according to their significance to survival and success
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The Limbic system mediates between
The needs of the Hypothalamus and the plans of the Neocortex to coordinate the most important needs at the moment
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What is the route of communication from the Hippocampus to the Hypothalamus in the Limbic system
- Hippocampus
- Basal Forebrain
- Habenula Nucleus
- Limbic midbrain area
- Hypothalamus
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