The NU670 Unit 2 neuroanatomy summary separates wanting from liking in a composite retiree's anhedonia and assigns each to reward circuitry, tagging every link with its evidence. Searches like "nu 670 unit 2 assignment example", "nu670 unit 2 sample" and "nu670 unit 2 example" land here.
What a finished NU670 Unit 2 functional neuroanatomy summary looks like
A one-page circuit diagram sits beside four short sections of prose. The diagram shows dopamine neurons of the ventral tegmental area projecting to the nucleus accumbens, with ventromedial prefrontal and orbitofrontal cortex assigning value and the anterior cingulate weighing effort. Section one describes what the circuit does in health: it signals that a reward is coming and energizes the work of pursuing it. Section two separates anticipatory from consummatory pleasure, drawing on Berridge and Robinson's rodent evidence that dopamine depletion removes motivated seeking while leaving hedonic taste reactions intact. Section three reports human findings, where reduced accumbens and caudate responses to monetary reward in unmedicated depression (Pizzagalli et al., 2009) show the rodent split mapping imperfectly onto people. Section four returns to the letter carrier and places his pattern on the diagram.
How a NU670 Unit 2 example is structured
The composite case opens the summary in three sentences, chosen because his report separates two components that a single word, anhedonia, usually blurs. The circuit is then described in its normal role before anything is said about illness, so the reader first learns what the ventral striatum does for a healthy person deciding whether a trip is worth the trouble. Evidence is layered by species and design. Rodent pharmacology establishes the wanting and liking distinction; human effort-task data (Treadway et al., 2012) show depressed adults less willing to work for reward; imaging shows blunted striatal responses that do not divide neatly along the same line. Each claim carries a bracketed tag naming its evidence type. The final section maps the letter carrier onto the diagram and states what remains uncertain: whether his pattern reflects dopamine signaling at all, or cortical valuation upstream of it.
A patient who separates two things
The letter carrier's report, low drive to go but enjoyment once there, is the reason he was chosen. His case lets the summary show that anhedonia involves at least two processes before any anatomy appears on the page.
The circuit in health first
Before depression is mentioned, the summary explains what VTA projections to the accumbens do on an ordinary day: signal that something good lies ahead and mobilize the effort to reach it. Illness then reads as a change to a known function.
Evidence tags on every claim
Bracketed labels such as [rodent pharmacology], [human behavioral task] and [human fMRI, small sample] follow each claim. Anyone checking the summary sees at a glance which links rest on people and which on animals.
Where the tidy split breaks
Human imaging shows reduced striatal response to rewards received, not only to rewards anticipated. The summary reports this plainly instead of forcing the data to fit the rodent distinction it was built on.
His pattern placed on the diagram
The last section marks where the letter carrier's symptoms most plausibly sit and names the competing explanation, cortical valuation rather than dopamine, so the mapping is offered as a hypothesis, not a result.
Where marks go in NU670 Unit 2
The steepest penalty goes to structures listed without work to do, so that the ventral striatum and prefrontal cortex appear in a sentence and nothing about lost motivation follows from them. A circuit linked to the symptom with no account of its normal function comes close behind, since prompts in this unit commonly ask what the circuit ordinarily does. Graders deduct when rodent findings about wanting and liking are written as human fact without a species label. Treating anhedonia as one experience, so that motivation and enjoyment are never separated, costs credit because the distinction organizes the literature. Overstating imaging, such as calling reduced striatal activity the source of depression, draws a comment about correlation. Lesser losses attach to unlabeled diagrams, sources older than the evidence they describe, and composite details specific enough to point to a real person.
Get a NU670 Unit 2 example written to your instructions
Which symptom does your section's Unit 2 prompt assign: anhedonia, intrusive memory, worry, or another? Share it with the rubric and any diagram requirement. A free first summary written to those instructions returns within 24-48h, the circuit described in its normal role first, then the symptom, with every claim tagged as rodent, human task or imaging evidence.
NU670 Unit 2 questions, answered
Which brain structures should the summary include?
Those that carry the explanation for the symptom your prompt assigned, and no more. For anhedonia that usually means the ventral tegmental area, the nucleus accumbens and the prefrontal regions that assign value. Adding memory or fear structures makes sense only when you can say what they contribute to this symptom; otherwise they read as padding.
Is the wanting and liking distinction accepted in human research?
It is influential and useful, but it comes largely from rodent work, and human data fit it imperfectly. Effort-based tasks support a motivational deficit in depression, while imaging often finds blunted responses to rewards received as well as anticipated. Presenting the distinction as a framework with partial human support, rather than as settled anatomy, is the accurate position.
Can a circuit summary mention medications?
Briefly, where the prompt permits and the link is mechanistic. Noting that some researchers argue serotonergic drugs do less for motivational anhedonia, and that this remains an open question, connects anatomy to treatment without drifting into prescribing. Keep any drug discussion short, since this assignment grades the circuit account rather than the treatment choice.