Limbic Flashcards
The essential function of the limbic system
The motivational components to couple autonomic function
Amygdala function
Play a primary role in memory, decision making, and emotional reactions.
Helps you make good decisions
General characteristics of Amygdala inputs and outputs
INPUTS: Concern the senses (sights, sounds, touches, smells and tastes)
OUTPUTS: Fibers leave the amygdala via stria terminalis, and return to the same areas which sent afferents.
True or False: The hippocampus stores memories.
False. It does not store memories– it allows you to put pieces of memory together (recall)
Kluver-Bucy syndrome
Caused by bilateral lesions to the tips of the temporal lobes, cutting the amygdala’s.
Characterized by:
(1) Docility
(2) Hyperphagia (dietary changes)
(3) Hyperorality (compulsion to examine objects by mouth)
(4) Hypersexuality
(5) Visual agnosia (inability to recognize familiar faces)
Efferents from the amygdala to the thalamus primarily terminate in the:
Dorsomedial Nucleus
The hippocampus is very susceptible to what kind of damage?
Damage from oxygen deprivation
Bilateral damage to hippocampus is often caused by what disease? What is the result?
Alzheimer’s
Anterograde amnesia: Inability to create new memories. Targets declarative memories, so most survival skills (speaking for example) remain in tact (until the disease spreads beyond the hippocampus)
Wernicke-Korsakoff Syndrome
Disabling degenerative brain disorder often caused by alcohol abuse.
Symptoms include:
Mental confusion, attention deficit, memory impairment (antegrade AND retrograde), vision impairment and stupor.
Wernicke’s- acute phase
Korsakoff’s- chronic phase
What blood vessel feeds the limbic system?
Anterior cerebral
Papez circuit
Circuit which functions in memory recall.
(1) Hippocampus
(2) Fornix
(3) Hypothalamus (mammillary bodies)
(4) Anterior Thalamic Nuclei
(5) Cingulate Gyrus
(6) Hippocampus
Where is the hippocampus located?
Temporal lobe
