A signature feature of mature ferret retinal ganglion cells (RGCs) is the stratification of their dendrites within either ON or OFF sublayers of the retinal inner plexiform layer (IPL). Dendritic stratification is achieved through the gradual restriction of RGC dendrites which initially ramify throughout the IPL. We examined the time course of stratification by retrogradely labeling ferret retinas with DiI at various postnatal ages. Stratification of beta and alpha RGC dendrites into either the ON or OFF sublayers of the IPL begins around postnatal day 5, when class-specific morphologies begin to emerge, and is largely completed by eye opening, at the end of the first postnatal month. Our results imply that dendritic stratification of ferret ON and OFF RGCs, as in other mammals, occurs independently of visually driven activity.

No abstract

Results of the 2016 ADMSEP survey echoed previous membership surveys. However, training in personnel management, diminishing faculty resources, and compensation for education time emerged in this survey. Conducting a membership survey continues to provide beneficial information regarding the administration and education that occurs within psychiatry clerkship. Additionally, topics meriting further details have been identified that will be investigated in future membership surveys.

A grade appeal is often the final step in the grading process for medical students. By identifying factors that contribute to grade appeals, areas for targeted interventions in the evaluation process are potentially identified. Future study of grade appeals, including from the medical students' perspective, is warranted.