Chapter 6 Quiz: The Neuroscience of Desire

12 questions. Questions 1–8 are multiple choice; questions 9–10 are short answer; questions 11–12 are brief analysis. Recommended time: 30 minutes.

Multiple Choice (Questions 1–8)

Question 1. The mesolimbic dopamine system, sometimes called the reward circuit, originates primarily in which brain structure?

a) The prefrontal cortex b) The amygdala c) The ventral tegmental area (VTA) d) The hippocampus

Answer: c

Explanation: The VTA (ventral tegmental area) is the primary source of dopaminergic neurons in the mesolimbic pathway. It projects to the nucleus accumbens, prefrontal cortex, and other limbic structures. The amygdala and hippocampus are components of the limbic system but are not the origin of the reward circuit.

Question 2. According to Kent Berridge's influential framework discussed in this chapter, dopamine is primarily associated with:

a) The pleasurable experience of receiving a reward b) The calm comfort of long-term attachment c) The motivated wanting and anticipation of reward d) The obsessive preoccupation characteristic of early love

Answer: c

Explanation: Berridge's wanting/liking distinction separates the motivational drive to seek a reward (wanting, dopamine-driven) from the hedonic pleasure of receiving it (liking, more associated with opioid/endocannabinoid systems). Early romantic desire is primarily a wanting-system phenomenon, not a liking-system one.

Question 3. Which of the following is an accurate description of a documented problem with the popular "oxytocin = love hormone" narrative?

a) Oxytocin has no effect on social behavior in human studies b) Oxytocin has been shown to increase in-group bonding while potentially increasing out-group hostility in some contexts c) Oxytocin only affects behavior in non-human mammals and has no documented effects in humans d) Oxytocin is not produced in the brain; it is produced only by the gonads

Answer: b

Explanation: De Dreu and colleagues showed that oxytocin can promote ethnocentrism and in-group favoritism. The simple "love hormone" narrative ignores this complexity. Option a is too extreme; option c is false; option d is incorrect (oxytocin is produced in the hypothalamus).

Question 4. Donatella Marazziti's research comparing people in early romantic love with people diagnosed with OCD found:

a) Both groups showed elevated serotonin levels compared to controls b) Both groups showed reduced platelet serotonin transporter density compared to controls c) OCD patients showed the same fMRI activation patterns as people in love d) Early romantic love increases activity in OCD-specific prefrontal circuits

Answer: b

Explanation: Marazziti's study found lower serotonin transporter density in both the "in love" and OCD groups, suggesting altered serotonergic function in both conditions. This doesn't mean love is a disorder, but it suggests the mechanisms of obsessive preoccupation overlap.

Question 5. The prairie vole research on vasopressin and pair-bonding is most accurately described as:

a) Definitive proof that monogamy is neurobiologically determined in mammals b) Evidence that vasopressin receptor distribution in reward regions can influence partner preference behavior in voles, with limited direct applicability to human pair-bonding c) A study showing that vasopressin injections cause humans to fall in love d) Research showing that all promiscuous species lack oxytocin receptors entirely

Answer: b

Explanation: The vole research demonstrated a compelling mechanism in a specific animal model, but the leap to human monogamy involves extrapolation across species with vastly different social complexity. Human pair-bonding involves cultural, legal, economic, and psychological factors absent in vole behavior.

Question 6. In Helen Fisher's tripartite model of love, which system is most associated with the calm, secure feeling of long-term partnership?

a) Lust b) Romantic attraction c) Attachment d) Reward prediction

Answer: c

Explanation: Fisher's attachment system (associated with oxytocin, vasopressin, and endogenous opioids) produces the calm, comfort-based bond of long-term partnership. Romantic attraction is more closely linked to dopamine-driven craving and norepinephrine-driven arousal.

Question 7. Which of the following is a genuine limitation of fMRI as used in romantic love research?

a) fMRI cannot detect brain activity in the limbic system b) fMRI requires participants to be in love with the experimenter to show valid results c) fMRI involves reverse inference — concluding that a specific psychological state occurred based on brain activation, even though many different states can activate the same regions d) fMRI only detects electrical activity, making it less reliable than PET scans for this research

Answer: c

Explanation: Reverse inference is a core methodological limitation: the same brain region (e.g., nucleus accumbens) activates in response to many different rewarding experiences, so its activation alone cannot confirm a specific emotional state. Option d is also inaccurate — fMRI measures BOLD (blood oxygen level-dependent) signals, not electrical activity.

Question 8. The chapter's discussion of the "addiction model of romantic love" concludes that:

a) Romantic love is clinically indistinguishable from substance addiction b) The addiction metaphor is useful for understanding overlapping neural mechanisms but misleading if taken to imply romantic love is inevitably harmful or that behavior is neurologically determined c) Breakup grief is a medical condition requiring the same treatment as drug withdrawal d) People who claim to be "addicted" to a partner are always in unhealthy relationships

Answer: b

Explanation: The chapter acknowledges the genuine neurobiological parallels (dopaminergic overlap, craving, withdrawal-like responses) while clearly stating the limits: addiction implies impaired function and harm in ways that love doesn't necessarily, and the metaphor cannot substitute for ethical reasoning about one's choices.

Short Answer (Questions 9–10)

Question 9. (75–100 words)

Explain the distinction between "wanting" and "liking" as developed in reward neuroscience, and explain why this distinction matters for understanding the experience of early romantic attraction.

Model Answer: "Wanting" refers to the dopamine-driven motivational urge to seek or pursue a reward — anticipation, craving, goal-directed behavior. "Liking" refers to the hedonic pleasure of actually experiencing that reward, which relies more on opioid and endocannabinoid systems. They are neurobiologically distinct and can dissociate. In early romantic attraction, the intense craving and preoccupation are primarily "wanting" phenomena — which explains why you can feel intensely drawn to someone without necessarily feeling satisfied or happy when with them, and why desire does not predict relationship quality.

Question 10. (75–100 words)

Why does the chapter argue that the brain being a "cultural organ" limits what neuroimaging studies alone can tell us about love?

Model Answer: Cultural context shapes what we recognize as romantic love, who counts as a desirable partner, which emotional states we label as attraction, and how we express and interpret them. Neuroimaging captures brain activation during an experience that participants have already culturally interpreted and labeled. An fMRI image of someone viewing their "romantic partner" is already downstream of cultural decisions about what love is, who the person is permitted to love, and what the experience is supposed to feel like. Neural patterns alone cannot explain this cultural variation.

Brief Analysis (Questions 11–12)

Question 11. (150–200 words)

A friend argues: "They proved that love is just oxytocin — there's a study where they gave people oxytocin and it made them trust strangers more, so obviously that's what love is." Identify at least three specific problems with this reasoning, drawing on chapter content.

Question 12. (150–200 words)

The chapter introduces Dr. Reyes's metaphor of neuroscience as "one floor of a tall building." What do you think the other floors of the building are? Name at least three non-neurobiological levels of explanation for romantic attraction and briefly describe what each level explains that neuroscience alone cannot.

Answer key for multiple choice questions: 1-c, 2-c, 3-b, 4-b, 5-b, 6-c, 7-c, 8-b