By mounting a miniature microscope on mice’s heads and implanting a thin glass rod into the brain, researchers were able to record neural activity during social behaviors.
A miniature microscope (right) about the size of a quarter let researchers peek inside mice’s heads and glimpse neural activity involved in social behavior.
When mice interact with male or female mice, different brain activity patterns light up. In the medial amygdala, some neurons respond to males (green), some respond to females (red), and other neurons respond to both sexes (yellow).