Delayed Onset of a Daytime Nap Facilitates Retention of Declarative Memory

BACKGROUND: Learning followed by a period of sleep, even as little as a nap, promotes memory consolidation. It is now generally recognized that sleep facilitates the stabilization of information acquired prior to sleep. However, the temporal nature of the effect of sleep on retention of declarative memory is yet to be understood. We examined the impact of a delayed nap onset on the recognition of neutral pictorial stimuli with an added spatial component. METHODOLOGY/PRINCIPAL FINDINGS: Participants completed an initial study session involving 150 neutral pictures of people, places, and objects. Immediately following the picture presentation, participants were asked to make recognition judgments on a subset of "old", previously seen, pictures versus intermixed "new" pictures. Participants were then divided into one of four groups who either took a 90-minute nap immediately, 2 hours, or 4 hours after learning, or remained awake for the duration of the experiment. 6 hours after initial learning, participants were again tested on the remaining "old" pictures, with "new" pictures intermixed. CONCLUSIONS/SIGNIFICANCE: Interestingly, we found a stabilizing benefit of sleep on the memory trace reflected as a significant negative correlation between the average time elapsed before napping and decline in performance from test to retest (p = .001). We found a significant interaction between the groups and their performance from test to retest (p = .010), with the 4-hour delay group performing significantly better than both those who slept immediately and those who remained awake (p = .044, p = .010, respectively). Analysis of sleep data revealed a significant positive correlation between amount of slow wave sleep (SWS) achieved and length of the delay before sleep onset (p = .048). The findings add to the understanding of memory processing in humans, suggesting that factors such as waking processing and homeostatic increases in need for sleep over time modulate the importance of sleep to consolidation of neutral declarative memories

The Temporal Signature of Memories: Identification of a General Mechanism for Dynamic Memory Replay in Humans

Reinstatement of dynamic memories requires the replay of neural patterns that unfold over time in a similar manner as during perception. However, little is known about the mechanisms that guide such a temporally structured replay in humans, because previous studies used either unsuitable methods or paradigms to address this question. Here, we overcome these limitations by developing a new analysis method to detect the replay of temporal patterns in a paradigm that requires participants to mentally replay short sound or video clips. We show that memory reinstatement is accompanied by a decrease of low-frequency (8 Hz) power, which carries a temporal phase signature of the replayed stimulus. These replay effects were evident in the visual as well as in the auditory domain and were localized to sensory-specific regions. These results suggest low-frequency phase to be a domain-general mechanism that orchestrates dynamic memory replay in humans

Pediatric urolithiasis: the current surgical management

Children represent about 1% of all patients with urolithiasis, but 100% of these children are considered high risk for recurrent stone formation, and it is crucial for them to receive a therapy that will render them stone free. In addition, a metabolic workup is necessary to ensure a tailored metaphylaxis to prevent or delay recurrence. The appropriate therapy depends on localization, size, and composition of the calculus, as well as on the anatomy of the urinary tract. In specialized centers, the whole range of extracorporeal shock-wave lithotripsy (ESWL), ureterorenoscopy (URS), and percutaneous nephrolithotomy (PCNL) are available for children, with the same efficiency and safety as in adults

From Clinical Phenotype to Genotypic Modelling: Incidence and Prevalence of Recessive Dystrophic Epidermolysis Bullosa (RDEB) [Corrigendum]

Eichstadt S, Tang JY, Solis DC, et al. Clin Cosmet Investig Dermatol. 2019;12:933– 942. There is an error with Table 5 on page 940. The authors have advised due to an error that occurred inadvertently at the time of assembling the tables, Tables 4 and 5 were duplicated. The correct Table 5 is shown below. The authors apologize for this error.   Read the original articl

US Nurses’ Challenges with Personal Protective Equipment during COVID-19: Interview Findings from the Frontline Workforce

This study aimed to describe nurses’ experiences with personal protective equipment while providing patient care during the first wave of the COVID-19 pandemic in the US. From May 2020 to September 2020, 100 individual interviews were conducted with nurses from diverse backgrounds and practice settings. Interviews were audio-recorded, transcribed, and verified for thematic analysis. Three key themes emerged related to personal protective equipment during COVID-19: (1) concerns with safety, (2) concerns with personal protective equipment supply, and (3) concerns with health care systems changing personal protective equipment policies. These findings support the importance of transparent and equitable institution-wide PPE standards in creating safe working environments. Clear communication around personal protective equipment policies and procedures, personal protective equipment education, and assurance of equitable access to equipment that can mitigate risk and disability while also reducing fear, confusion, and frustration among nurses. Maintaining clear and consistent personal protective equipment guidelines and communication regarding supplies and procedures enhances transparency during both routine and critical times de-escalating the inevitable strain concomitant with providing patient care during a global pandemic

US Nurses’ Challenges with Personal Protective Equipment during COVID-19: Interview Findings from the Frontline Workforce

This study aimed to describe nurses’ experiences with personal protective equipment while providing patient care during the first wave of the COVID-19 pandemic in the US. From May 2020 to September 2020, 100 individual interviews were conducted with nurses from diverse backgrounds and practice settings. Interviews were audio-recorded, transcribed, and verified for thematic analysis. Three key themes emerged related to personal protective equipment during COVID-19: (1) concerns with safety, (2) concerns with personal protective equipment supply, and (3) concerns with health care systems changing personal protective equipment policies. These findings support the importance of transparent and equitable institution-wide PPE standards in creating safe working environments. Clear communication around personal protective equipment policies and procedures, personal protective equipment education, and assurance of equitable access to equipment that can mitigate risk and disability while also reducing fear, confusion, and frustration among nurses. Maintaining clear and consistent personal protective equipment guidelines and communication regarding supplies and procedures enhances transparency during both routine and critical times de-escalating the inevitable strain concomitant with providing patient care during a global pandemic