The brain’s helper cells have a hand in learning fear
Astrocytes in the hippocampus may send signals that promote memories of trauma
![astrocyte](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/11/111417_BO_astrocytes_fear_main.jpg?fit=860%2C460&ssl=1)
NEW ROLE A kind of brain cell called an astrocyte (shown) may help nerve cells in the hippocampus form traumatic memories, a study in rats suggests.
GerryShaw/Wikimedia Commons (CC BY-SA 3.0)