Limbic System

Question 1

What makes the fornicate gyrus?

Answer 1

Cingulate and parahippocampal gryus

Question 2

What does the cingulum connect?

Answer 2

Parahippocampal and cingulate gyrus

Question 3

What does the unicate fascicle connect?

Answer 3

Temporal and frontal lobes

Question 4

What is the hippocampal formations role in memory?

Answer 4

Consolidation of short term to long term memory

Question 5

What are the subcategories of long term memory?

Answer 5

• Explicit (declarative) conscious
  
  • Episodic (events relevant to self)
    
    • cortex
  • Semantic (knowledge)
    
    • cortex
• Implicit (non-declarative) unconscious
  
  • Skills, processes, habits
    
    • striatum, cerebellum, motor cortex
  • Operant condition
    
    • amygdala

Question 6

Describe the limbic loop

Answer 6

Question 7

Describe the antomical location of the entorhinal cortex and what it does

Answer 7

Rostral portion of the parahippocampal gyrus. Imporant for spatial memory and learning.

Contains grid cells for spatial navigation

Question 8

What structures make up the hippocampal formation?

Answer 8

Hippocampus proper + denate +entorhinal cortex + subiculum

Question 9

What type of neurons does the hippocapus contain?

Answer 9

Place and time neurons

Question 10

What is the hippocampal sector CA1, CA2 and the dentate gyrus important for?

Answer 10

CA1 = hypoxia

CA2 = Seizure

Dentate = only place neurogenesis occurs (increasing exercise, enriched environment enhance this)

Abalated neurogenesis can cause spatial learning deficts in mice

Question 11

Describe the Papez Circuit

Answer 11

Question 12

What does the fornix connect?

Answer 12

2 hippocampi and a mamillary body

Question 13

What does the hippocampal comissure connect?

Answer 13

The fornix

Question 14

What role does the septum pellicidum play?

Answer 14

Seprates the lateral ventricles

Question 15

Where are the mamillary bodies located?

Answer 15

Basal aspect of the brain, posterior portion of the hypothalamus

Question 16

What syndrome/occurs when the mammillary bodies are damaged?

Answer 16

Damage to the MB can be causes via severe malnutrition/alcoholism. This caused by a vit b deficieny, hence resulting in memory loss

Question 17

Anatomically, where is the amgdala located?

Answer 17

Medial portion of the temporal lobe housed in the uncus and rostral to the hippocampus

Question 18

What are the connections of the amygdala

Answer 18