Atraumatic Vertebral Artery Dissection in a Patient With a Migraine Headache.

This case discusses a 34-year-old active duty male who presented to the emergency department with a 2-week persistent headache. His initial review of symptoms was reassuring until a detailed neurologic examination on his second visit revealed a visual deficit in the left upper quadrant. Additionally, he complained of intermittent tension headaches for the last several years but had no history of diagnosed migraines until he was seen 4 days prior for empiric migraine therapy in the same emergency department and left without improvement in symptoms.

Pou4f2 knock-in Cre mouse: A multifaceted genetic tool for vision researchers.

Purpose: A transgenic mouse that expresses Cre recombinase under control of the Pou4f2-promoter (also referred to as Brn-3b and Brn-3.2) was characterized. Pou4f2 expression has been reported in a subset of retinal ganglion cells (RGCs) in the retina, in the midbrain, and in the germline.