Neuroscience InsightsPub Date : 2019-12-31eCollection Date: 2019-01-01DOI: 10.1177/1179069519892933
John Ni Dieter, Scot D Engel
{"title":"Traumatic Brain Injury and Posttraumatic Stress Disorder: Comorbid Consequences of War.","authors":"John Ni Dieter, Scot D Engel","doi":"10.1177/1179069519892933","DOIUrl":"https://doi.org/10.1177/1179069519892933","url":null,"abstract":"Scientific literature is reviewed supporting a “consequence of war syndrome (CWS)” in Operation Enduring Freedom/Operation Iraqi Freedom/Operation New Dawn soldiers. CWS constituents include chronic pain and insomnia, other physical complaints, posttraumatic stress disorder (PTSD), anxiety, depression, and neuropsychological deficits. The foundation of CWS lies with the chronic stressors inherent to deployment and the cascade of biological events mediated and maintained by hypothalamic-pituitary-adrenal (HPA) axis dysregulation. Such dysregulation is modified by the individual’s specific experiences at war, difficulty reintegrating to post-deployment life, and the onset or exacerbation of the chronic and comorbid physical, emotional, and cognitive disorders. The circuit network between the prefrontal cortex (PFC), amygdala, and hippocampus is particularly sensitive to the consequences of war. The review’s specific conclusions are as follows: HPA axis dysregulation contributes to the chronic insomnia and hyperarousal seen in soldiers. There is considerable symptom overlap between PTSD and blast-related head injury, and it is difficult to determine the relative contributions of the two disorders to abnormal imaging studies. In some cases, traumatic brain injury (TBI) may directly precipitate PTSD symptoms. While not intuitive, the relationship between TBI and postconcussion syndrome appears indirect and mediated through PTSD. Blast-related or conventional head injury may have little long-term impact on neuropsychological functioning; contrarily, PTSD particularly accounts for current cognitive deficits. The psychological experience of CWS includes a “war-within” where soldiers continue to battle an internalized enemy. Successful treatment of CWS entails transdisciplinary care that addresses each of the constituent disorders.","PeriodicalId":36527,"journal":{"name":"Neuroscience Insights","volume":"14 ","pages":"1179069519892933"},"PeriodicalIF":3.6,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1179069519892933","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37897308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Neuroscience InsightsPub Date : 2019-12-31eCollection Date: 2019-01-01DOI: 10.1177/2633105519896803
Kazushige Kimura, James F Reichert, Debbie M Kelly, Zahra Moussavi
{"title":"Older Adults Show Less Flexible Spatial Cue Use When Navigating in a Virtual Reality Environment Compared With Younger Adults.","authors":"Kazushige Kimura, James F Reichert, Debbie M Kelly, Zahra Moussavi","doi":"10.1177/2633105519896803","DOIUrl":"https://doi.org/10.1177/2633105519896803","url":null,"abstract":"<p><p>Daily life requires accurate navigation, and thus better understanding of aging on navigational abilities is critical. Importantly, the use of spatial properties by older and younger adults remains unclear. During this study, younger and older human adults were presented with a virtual environment in which they had to navigate a series of hallways. The hallways provided 2 general types of spatial information: geometric, which included distance and directional turns along a learned route, and featural, which included landmarks situated along the route. To investigate how participants used these different cue types, geometric and/or landmark information was manipulated during testing trials. Data from 40 younger (20 women) and 40 older (20 women) adults were analyzed. Our findings suggest that (1) both younger and older adults relied mostly on landmarks to find their way, and (2) younger adults were better able to adapt to spatial changes to the environment compared with older adults.</p>","PeriodicalId":36527,"journal":{"name":"Neuroscience Insights","volume":"14 ","pages":"2633105519896803"},"PeriodicalIF":3.6,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/2633105519896803","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37897310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Neuroscience InsightsPub Date : 2019-12-31eCollection Date: 2019-01-01DOI: 10.1177/1179069519889027
Korri S Hershenhouse, Orr Shauly, Daniel J Gould, Ketan M Patel
{"title":"Meningeal Lymphatics: A Review and Future Directions From a Clinical Perspective.","authors":"Korri S Hershenhouse, Orr Shauly, Daniel J Gould, Ketan M Patel","doi":"10.1177/1179069519889027","DOIUrl":"https://doi.org/10.1177/1179069519889027","url":null,"abstract":"<p><p>The recent discovery of lymphatic vessels in the meningeal layers calls into question the known mechanisms of fluid and macromolecule homeostasis and immunoregulation within the central nervous system. These meningeal lymphatic vessels and their potential role in the pathophysiology of neurological disease have become a rapidly expanding area of research, with the hopes that they may provide a novel therapeutic target in the treatment of many devastating conditions. This article reviews the current state of knowledge surrounding the anatomical structure of the vessels, their functions in fluid and solute transport and immune surveillance, as well as their studied developmental biology, relationship with the novel hypothesized \"glymphatic\" system, and implications in neurodegenerative disease in animal models. Furthermore, this review summarizes findings from the human studies conducted thus far regarding the presence, anatomy, and drainage patterns of meningeal lymphatic vessels and discusses, from a clinical perspective, advancements in both imaging technologies and interventional methodologies used to access ultrafine peripheral lymphatic vessels.</p>","PeriodicalId":36527,"journal":{"name":"Neuroscience Insights","volume":"14 ","pages":"1179069519889027"},"PeriodicalIF":3.6,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1179069519889027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37895924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}