Utilization of Telemedicine for Patients Receiving In-center Hemodialysis in the United States.

Background: In March 2020, responding to the COVID-19 pandemic, federal emergency waivers in the United States enabled kidney care providers (nephrologists and advanced practice providers) to substitute face-to-face in-center hemodialysis visits with telemedicine encounters. We examined whether the frequency of kidney care provider visits and hospitalizations were associated with telemedicine use in hemodialysis care.

Methods: We used Medicare claims to identify US patients receiving in-center hemodialysis during the first 16 months of the COVID-19 pandemic.

Mechanistic Target of Rapamycin Signaling Activity in the Human Placenta Across Gestation and in Maternal Obesity.

The mechanistic target of rapamycin (mTOR) system is vital to placental development, formation, and function. Alterations in this system in the placenta have been associated with altered fetal growth. However, changes in placental mTOR signaling across gestation are poorly understood.

Recurrent activity propagates through labile ensembles in macaque dorsolateral prefrontal microcircuits.

Human and non-human primate studies clearly implicate the dorsolateral prefrontal cortex (dlPFC) as critical for advanced cognitive functions. It is thought that intracortical synaptic architectures within the dlPFC are the integral neurobiological substrate that gives rise to these processes. In the prevailing model, each cortical column makes up one fundamental processing unit composed of dense intrinsic connectivity, conceptualized as the "canonical" cortical microcircuit.