Amygdala is an almond shape region in the brain which has a crucial role in fear or emotional memory. This image is a close look of this region that I took with a Leica microscope just recently.
These are the neurons that got beautifully activated by a fear stimulus in the amygdala of a genetically engineered mouse brain. The bright yellow fluorescence is like a reporter saying which neurons were involved. It's very important to see what is it that some neurons can be activated because of the trigger and the other not. What are the factors that make them different from each other.
The method that we just started to use is new and seems promising. What you can see under the microscope is astonishing, really amazing!