Limbic System

Question 1

Limbic system is involved in the five F’s:

Answer 1

1. Feeding
2. Fighting
3. Fleeing
4. Feeling
5. Fucking

Question 2

the limbic system will include the following structures:

Answer 2

1. Hippocampus
2. Amygdala
3. Nucleus accumbens
4. Mammillary bodies
5. Anterior thalamic nucleus
6. Septum (Septal nuclei)
7. Subcallosal, cingulate, and parahippocampal gyri

Question 3

name 3 Limbic Pathways:

what does each connect?

Answer 3

1. Mammillothalamic tract: Connects mammillary bodies with anterior nucleus of thalamus and continues to Cingulate gyrus
2. Fimbria: Originates in the medial part of the hippocampus, and becomes the Fornix at the posterior end of hippocampus.
3. Fornix: From hippocampus to mammillary bodies. Also anterior nucleus of thalamus, tegmentum, septum, and hypothalamus.

Question 4

what structures make up the Hippocampal Formation?

Answer 4

Hippocampus

Parahippocampal gyri

Dentate gyri

Entorhinal cortex

Question 5

what is the hippocampus involved in?

Answer 5

1. recent memory functions specifically: consolidation of memory
2. recognition of novelty

Question 6

what is another name for the hippocampus?

Answer 6

Amon’s Horn

Question 7

what are the Afferent connections of hippocampus?

What are the Efferent connections of hippocampus?

Answer 7

1. Cortical regions
2. Septum (via fornix)
3. Anterior nucleus of thalamus
4. Mammillary bodies
5. Septum
6. Anterior nucleus of thalamus
7. Tegmentum

Question 8

what is the function of the amygdala?

Answer 8

determining affective (emotional)

perception of sensory stimuli, particularly fear

Question 9

what connects amygdala to hypothalamus and what does it allow the amygdala to do?

Amygdala is connected (via thalamus) to where? these regions are involved in what?

Answer 9

stria terminalis. By this connection, amygdala can influence autonomic responses to certain stimuli.

frontal and cingulate cortices, regions associated with attaching meaning to a stimuli.

Question 10

finish the sentence:

the bigger the amygdala, the more…..the animal

………………have bigger amygdalas than………….

Answer 10

aggressive

men, women

Question 11

what is the Entorhinal cortex?

what does it do?

what brodmann numbers make up this area?

Where is it located in?

Answer 11

• Helps connect hippocampus and neocortex
• involved in memory consolidation.
• 28, 34
• the rostral temporal lobe, near the hippocampus.

Question 12

what is the Septum (septum pellucidum)?

Answer 12

Thin sheet of gray matter that separates the lateral ventricles

Question 13

Cingulate Cortex/Gyrus is connected to entorhinal cortex via what?

what does it do?

Answer 13

cingulum

involved learning how to recognize and avoid negative consequences’