Effects of a constant light environment on hippocampal neurogenesis and memory in mice

▶ Constant light attenuates neurogenesis in the hippocampus. ▶ Attenuated neurogenesis occurs only in the granule cell layer, but not in the hilus. ▶ Constant light impairs memory performance as well as hippocampal neurogenesis. ▶ Cyclic light-dark environment has an important role in the hippocampal system.