MRI scans reveal how the brain tells the body to pee
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/07/prefrontalcortex.jpg?fit=860%2C460&ssl=1)
Brain scans of men taken before, during and after they urinate show that the insula, thalamus, brainstem and prefrontal cortex (red) are associated with successfully initiating the bodily function.
BodyParts3D/Wikimedia Commons (CC BY-SA 2.1 JP)