A Blast of Light to the Brain Can Make Mice Mean
The burgeoning field of optogeneticsâ€”using shot of light on neurons to control behaviorâ€”has already produced some intruiging and peculiar results. Now add one more: Scientists can use it to make mice angry and aggressive.
With a pulse of light, Dayu Lin from New York University can turn docile mice into violent fighters â€“ itâ€™s Dr Jekyllâ€™s potion, delivered via fibre optic cable. The light activates a group of neurons in the mouseâ€™s brain that are involved in aggressive behaviour. As a result, the mouse attacks other males, females, and even inanimate objects.
Lin focused on a primitive part of the brain called the hypothalamus that keeps our basic bodily functions ticking over. It lords over body temperature, hunger, thirst, sleep and more. In particular, Lin found that a small part of this area â€“ the ventrolateral ventromedial hypothalamus (VMHvl) â€“ acts as a hub for both sex and violence.
Read plenty more about this study in the rest of Ed’s post at Not Exactly Rocket Science.