An Intervention on Anxiety Symptoms in Moderate Alzheimer's Disease through Virtual Reality: A Feasibility Study and Lessons Learned

Mitochondrial Interaction with Serotonin in Neurobiology and Its Implication in Alzheimer's Disease

Alzheimer's disease (AD) is a lethal neurodegenerative disorder characterized by severe brain pathologies and progressive cognitive decline. While the exact cause of this disease remains unknown, emerging evidence suggests that dysregulation of neurotransmitters contributes to the development of AD pathology and symptoms. Serotonin, a critical neurotransmitter in the brain, plays a pivotal role in regulating various brain processes and is implicated in neurological and psychiatric disorders, including AD. Recent studies have shed light on the interplay between mitochondrial function and serotonin regulation in brain physiology. In AD, there is a deficiency of serotonin, along with impairments in mitochondrial function, particularly in serotoninergic neurons. Additionally, altered activity of mitochondrial enzymes, such as monoamine oxidase, may contribute to serotonin dysregulation in AD. Understanding the intricate relationship between mitochondria and serotonin provides valuable insights into the underlying mechanisms of AD and identifies potential therapeutic targets to restore serotonin homeostasis and alleviate AD symptoms. This review summarizes the recent advancements in unraveling the connection between brain mitochondria and serotonin, emphasizing their significance in AD pathogenesis and underscoring the importance of further research in this area. Elucidating the role of mitochondria in serotonin dysfunction will promote the development of therapeutic strategies for the treatment and prevention of this neurodegenerative disorder.

Contact with Nature in Social Deprivation during COVID-19: The Positive Impact on Anxiety

The 2019 outbreak of the novel coronavirus disease (COVID-19) had a devastating impact on millions of people worldwide. Following the constantly changing course of the pandemic, the Italian government massively restricted public and private life to prevent the further spread of the virus. Unfortunately, lockdown policies negatively impacted many people's mental and physical health. Numerous studies recognized an essential role of urban green areas in promoting human well-being. The present study aims to evaluate the effect of personal dispositions towards nature, measured using the connectedness to nature scale (CNS) and actual contact with green spaces (CwN) on human well-being (i.e., anxiety) and medicine intake during COVID-19 lockdowns. A total of 637 Italian residents answered a survey aimed at gathering information about the above variables. A series of path analyses were performed. The results showed that the CNS was positively associated with the CwN, and the latter, in turn, was negatively associated with anxiety. Finally, anxiety was positively related to medicine intake. In sum, these results identify the positive role of person-nature relationships for individual well-being during COVID-19 restrictions.

Virtual reality interventions to reduce psychological distress during colonoscopy: a rapid review

INTRODUCTION

Colonoscopy can cause psychological distress in patients, consequently discouraging patients from undergoing an unpleasant procedure or reducing compliance with follow-up examinations. This rapid review aimed to assess the feasibility and efficacy of Virtual Reality (VR) interventions during colonoscopy on patients' perceived psychological distress and procedure satisfaction.

AREAS COVERED

We searched PubMed, CINAHL, ProQuest/All Databases, and Cochrane Library databases on 1 December 2022, with a date limiter of 2002-2022 for articles that investigated the effect and feasibility of any type of immersive VR-based intervention on patients' pain, anxiety, discomfort, and procedure satisfaction immediately before, during, and/or post-procedure of colonoscopy.

EXPERT OPINION

Initially, 118 articles were identified, of which seven were eligible and included in this rapid review. Our findings demonstrate that VR interventions during colonoscopy were feasible, significantly reduced participant pain and anxiety, and significantly increased participant satisfaction with the procedure. VR interventions appear to be an effective alternative for patients who prefer to avoid analgetic medications or as an adjunct to routine sedation during colonoscopy. Directions of research design should focus on an optimized blinding process, using the high-end technology of 3-dimensional devices, considering an audiovisual distracting intervention, and designing multicenter and high-quality Randomized Controlled Trials.

Can Virtual Reality Cognitive Rehabilitation Improve Executive Functioning and Coping Strategies in Traumatic Brain Injury? A Pilot Study

Executive dysfunction is among the most common and disabling facets of cognitive impairment following traumatic brain injury (TBI), and may include deficits in reasoning, planning, mental flexibility, some aspects of attention and orientation, awareness and behavior. Rehabilitation programs based on cognitive-behavioral approaches to retrain planning and problem-solving and other executive deficits may improve such cognitive dysfunction. The purpose of this study is to investigate the effects of non-immersive virtual reality-based training to improve executive abilities and to reduce anxiety and depression symptoms in patients with TBI. Twenty patients with moderate to severe TBI were enrolled at our Neurorehabilitation Unit and divided to receive either the standard cognitive training or the virtual reality (VR) based cognitive training using the virtual reality rehabilitation system (VRRS-Evo). Each group received the same amount of rehabilitative training, including ROT (Reality Orientation Therapy) and Executive Training (ET), but using a different approach, i.e., a paper and pencil and an advanced approach. All patients were evaluated with a specific psychometric battery before (T0) and after the end (T1) of each program. Comparing pre- and post- treatment scores, in the VR-CT group, we found statistically significant differences in all administered outcome measures for cognitive and executive functioning, i.e., MoCA (p < 0.005), FAB (p < 0.005), TMT-A (p < 0.005), TMT-B (p < 0.005), TMT-BA (p < 0.001), and mood, i.e., HRS-D (p < 0.008). In the Conventional cognitive training (C-CT) group, we found a significant improvement only in MoCA (p < 0.03), FAB (p < 0.02) and in TMT-BA (p < 0.01). Coping strategies also improved, with better results in the VR-CT group. Our results suggest that VR rehabilitation, using the VRRS system, may be a valuable and motivational approach to improve visuo-executive abilities and coping strategies as well as mood in chronic TBI patients.