Limbic System

Question 1

What is the primary role of the limbic system?

Answer 1

Regulation and modulation of emotions and memory

Question 2

Which brain system is most associated with emotion, motivation, and memory?

Answer 2

Limbic system

Question 3

Which structures make up the limbic system?

Answer 3

Hypothalamus, thalamus, hippocampus, amygdala

Question 4

What is the main function of the hypothalamus?

Answer 4

Homeostasis and regulatory functions

Question 5

Which bodily functions are regulated by the hypothalamus?

Answer 5

Appetite, hunger, thirst, water balance, temperature, circadian rhythm, libido, hormones

Question 6

What does the mnemonic WHAT HEC stand for?

Answer 6

W – Water balance
H – Hunger
A – Appetite
T – Temperature
H – Hormones
E – sEX / libido
C – Circadian rhythm

Question 7

Which limbic structure links the nervous system to the endocrine system?

Answer 7

Hypothalamus

Question 8

A patient has disrupted sleep, appetite changes, and altered libido. Which structure is most likely involved?

Answer 8

Hypothalamus

Question 9

What is the primary function of the thalamus?

Answer 9

Sensory relay center

Question 10

Which sense does the thalamus NOT relay?

Answer 10

Smell (olfaction)

Question 11

How is the thalamus best described on exams?

Answer 11

“Sensory switchboard”

Question 12

Besides sensory relay, what cognitive functions does the thalamus modulate?

Answer 12

Memory and related behaviors

Question 13

Damage to the thalamus would most affect which function?

Answer 13

Sensory processing (except smell)

Question 14

What is the primary role of the hippocampus?

Answer 14

Converts short-term memory into long-term memory

Question 15

Which types of functions are associated with the hippocampus?

Answer 15

Memory, learning, motivation, stress regulation, emotions

Question 16

Damage to the hippocampus would most likely cause which symptom?

Answer 16

Inability to form new memories (anterograde amnesia)

Question 17

Which limbic structure is most affected early in Alzheimer’s disease?

Answer 17

Hippocampus

Question 18

What is the primary role of the amygdala?

Answer 18

Modulates emotions and emotional memory

Question 19

Which emotions are most strongly associated with the amygdala?

Answer 19

Fear, anxiety, aggression

Question 20

Which limbic structure connects smell to emotional response?

Answer 20

Amygdala

Question 21

What does FEAR of smells represent?

Answer 21

F – Fear
E – Emotions
A – Aggression / Anxiety
R – Regulates mood
→ Linked to smell via emotion

Question 22

Overactivity of the amygdala is most associated with which psychiatric symptoms?

Answer 22

Anxiety, fear responses, emotional dysregulation

Question 23

Emotional memory is primarily regulated by which structure?

Answer 23

Amygdala

Question 24

Memory consolidation is controlled by which structure?

Answer 24

Hippocampus

Question 25

Homeostatic functions (sleep, appetite, libido) point to which structure?

Answer 25

Hypothalamus

Question 26

Sensory input (except smell) passes through which structure?

Answer 26

Thalamus

Question 27

Match the structure to function: Hypothalamus Thalamus Hippocampus Amygdala

Answer 27

Hypothalamus → Homeostasis Thalamus → Sensory relay Hippocampus → Memory formation Amygdala → Fear & emotion