The image shows a bat in flight.

3D Compass in the Brain

A group of neurons in the hippocampal formation sense which direction the head is pointed, a new study reports.
This image shows a mouse hippocampus.

Memories Get the Emotional Switch

A new study reports neurons which encode whether a memory is negative or positive can be reprogrammed to change the emotional association of the experience. Findings could have implications for future research into PTSD.