| Course | DNP 660 Advanced Neuropsychopathology Lifespan |
|---|---|
| Module | Module 6 |
| Paper type | Research article summary with discussion post |
| Length | About 377 words |
| Format | Discussion post with APA 7 citations |
| School | Arizona State University |
| Program | Doctor of Nursing Practice |
| Updated | October 2026 |
Free sample paper for DNP 660 Module 6
Week 9 Article Summary and Discussion: Does PTSD Change the Brain?
Smaller Hippocampi, Small Effects: Summarizing a Multisite Imaging Study of PTSD and Answering Whether PTSD Changes the Brain
The Article
Logue, M. W., et al. (2018). Smaller hippocampal volume in posttraumatic stress disorder: A multisite ENIGMA-PGC study. Biological Psychiatry, 83(3), 244-253.
Summary
The researchers pooled brain imaging and clinical data from 1,868 adults, 794 of them with PTSD, contributed by 16 cohorts, making it the largest neuroimaging study of PTSD at the time. They measured the volume of eight subcortical structures using one standardized analysis method across all sites. People with current PTSD had smaller hippocampal volumes than trauma-exposed controls, with a small effect size (Cohen's d = -0.17). Amygdala volumes were also slightly smaller, but that difference did not survive correction for testing several brain regions (Logue et al., 2018).
Strengths and Limits
The study's size and its use of one analysis method across sites reduce the inconsistency that troubled earlier, smaller studies. Comparing PTSD with trauma-exposed controls, rather than people with no trauma, isolates the disorder from trauma exposure itself. Because every participant was scanned only once, the study cannot show whether trauma and PTSD shrank the hippocampus or whether people with smaller hippocampi were more vulnerable to developing PTSD. The effect is also small, meaning there is wide overlap between groups.
Does PTSD Change the Brain?
My answer is a qualified yes. PTSD is clearly associated with differences in brain structure and function, and the hippocampus, which helps place memories in context, is a plausible site. Whether PTSD causes those differences, or whether they come first, is still uncertain; both may be true for different people. The neuroplasticity we discussed in Week 7 also suggests the brain can change in the other direction with treatment, though this study did not test that.
What It Means for Patients
I would not tell a patient, "Your brain is damaged." I might say, "Trauma can change how the brain handles memories and alarm signals, and treatment can help the brain learn safety again." That keeps the science accurate and the message hopeful, and it points to treatments that build new learning, consistent with plasticity models (Price & Duman, 2020), such as cognitive behavioral approaches, which have broad support across anxiety and stress-related conditions (Hofmann et al., 2012).
References
Hofmann, S. G., Asnaani, A., Vonk, I. J. J., Sawyer, A. T., & Fang, A. (2012). The efficacy of cognitive behavioral therapy: A review of meta-analyses. Cognitive Therapy and Research, 36(5), 427-440. https://doi.org/10.1007/s10608-012-9476-1
Logue, M. W., van Rooij, S. J., Dennis, E. L., Davis, S. L., Hayes, J. P., Stevens, J. S., Densmore, M., Haswell, C. C., Ipser, J., Koch, S. B., Korgaonkar, M., Lebois, L. A., Peverill, M., Baker, J. T., Boedhoe, P. S., Frijling, J. L., Gruber, S. A., Harpaz-Rotem, I., Jahanshad, N., ... Morey, R. A. (2018). Smaller hippocampal volume in posttraumatic stress disorder: A multisite ENIGMA-PGC study: Subcortical volumetry results from posttraumatic stress disorder consortia. Biological Psychiatry, 83(3), 244-253. https://doi.org/10.1016/j.biopsych.2017.09.006
Price, R. B., & Duman, R. (2020). Neuroplasticity in cognitive and psychological mechanisms of depression: An integrative model. Molecular Psychiatry, 25(3), 530-543. https://doi.org/10.1038/s41380-019-0615-x
Reading the DNP 660 Module 6 assignment instructions
The posted syllabus grades one article summary at 5% of the course grade, 10 points, due in Week 9 on PTSD and brain changes, and the same week's discussion asks whether you think PTSD does change the brain. Canvas gives the posting deadline, any article requirements and the rubric. Expect to choose a peer-reviewed article on PTSD and the brain, summarize its design, sample, findings and limits accurately, and then answer the discussion question with a reasoned position that reflects what the evidence can and cannot show. Large or multisite studies and systematic reviews are good choices because they give a firmer basis for your answer. Report numbers exactly as the article does.
How the DNP 660 Module 6 example is put together
The post gives the full citation, then a summary of the design, the 1,868 participants from 16 cohorts, the structures measured and the main findings with the effect size and the correction that removed the amygdala result. A strengths and limits section explains why the size and standardized method matter and why a cross-sectional design cannot show cause. The answer to the discussion question is a qualified yes, linked to the earlier week on neuroplasticity. A final section shows how the writer would explain the finding to a patient in hopeful, accurate words. Three sources support the post. The patient-facing explanation shows how research findings become clinical language. The writer's answer stays within what the design allows.
Reading the DNP 660 Module 6 grading rubric
Grading will likely focus on accurate reporting of the study's design, sample, findings and limits, appropriate interpretation, a reasoned answer to the discussion question and clear, timely writing. Credit goes to summaries that include numbers such as sample size and effect size and explain what they mean. Distinguishing association from causation is a key sign of critical reading. Connecting the study to earlier course concepts shows integration. Translating findings into patient-friendly language shows clinical relevance. Choosing a strong study, such as a large multisite analysis, helps the whole post. A careful answer that reflects the study's design often scores higher than a confident one.
DNP 660 Module 6 help with common mistakes
Summaries lose points when they echo the abstract sentence by sentence. Write the summary in your own words and add your own judgment of strengths and limits. Another is answering the discussion question with more certainty than the study supports; cross-sectional findings cannot show cause. Report effect sizes, not only p values. If you would like help summarizing an article you chose, send it to the desk. Choose an article early so you have time to read the methods. Keep the patient-facing explanation hopeful and accurate. Look for a study that compares PTSD with trauma-exposed controls, since that isolates the disorder. Note the effect size in your own words.
Write yours, or have the desk draft it
This paper is an original model document written by our desk, not a submitted student paper and not an official Arizona State University document. Read it for the moves, then write your own to the instructions in your classroom. If you want one built to your exact prompt and rubric, the first custom sample is free and arrives in 24 to 48 hours.
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DNP 660 Module 6 questions, answered
Where can I find a free DNP 660 Module 6 sample paper?
A complete DNP 660 Week 9 article summary sample on a multisite imaging study of PTSD and the hippocampus, with an answer to whether PTSD changes the brain, appears on this page.
Does PTSD shrink the hippocampus?
A large multisite study found slightly smaller hippocampal volume in people with current PTSD, but it could not show whether PTSD caused the difference.
How much is the DNP 660 article summary worth?
The posted syllabus lists one article summary at 5% of the grade, 10 points.
What should a research article summary include?
Who did the study and how, who took part, what was found in actual numbers, where the design falls short and how the results bear on the week's question.
How should PTSD brain findings be explained to patients?
Accurately and hopefully, for example that trauma can change how the brain handles memories and alarm, and treatment can help it learn safety again.