Stimulation and Recording of the Hippocampus Using the Same Pt-Ir Coated Microelectrodes.

Same-electrode stimulation and recording with high spatial resolution, signal quality, and power efficiency is highly desirable in neuroscience and neural engineering. High spatial resolution and signal-to-noise ratio is necessary for obtaining unitary activities and delivering focal stimulations. Power efficiency is critical for battery-operated implantable neural interfaces.

Radiologic aspects of COVID-19 pneumonia: outcomes and thoracic complications.

Outcomes vary widely in patients with COVID-19. Whereas some patients have only mild symptoms of short duration, others develop severe disease that leads to acute respiratory distress syndrome requiring prolonged stays in intensive care units. Radiologically, the initial stage is characterized by viral pneumonia with mild expression.

Electrochemical and biological characterization of thin-film platinum-iridium alloy electrode coatings: a chronic in vivo study.

Objective: To evaluate the electrochemical properties, biological response, and surface characterization of an electrodeposited Platinum-Iridium (Pt-Ir) electrode coating on cochlear implants subjected to chronic stimulation in vivo.

Approach: Electrochemical impedance spectroscopy (EIS), charge storage capacity (CSC), charge injection limit (CIL), and voltage transient (VT) impedance were measured bench-top before and after implant and in vivo. Coated Pt-Ir and uncoated Pt electrode arrays were implanted into cochlea of normal hearing rats and stimulated for ∼4 h d, 5 d week for 5 weeks at levels within the normal clinical range.

What Attracts Medical Students to Primary Care? A Nominal Group Evaluation.

Objective: To examine the perceptions of first-year medical students on their experiences in primary care.

Methods: Nominal group technique sessions were conducted with first-year medical students for 5 years. Questions were designed to evaluate primary care experiences and the role of primary care physicians.