![3 high impact papers about measuring anxiety in the Elevated Zero Maze measuring-anxiety-elevated-zero-maze](https://www.noldus.com/static/images/core-blog/measuring-anxiety-elevated-zero-maze-1649247521.jpg)
3 high impact papers about measuring anxiety in the Elevated Zero Maze
The elevated zero maze (EZM) is a variation on the elevated plus maze (EPM) and was created to eliminate the center region of the EPM. This blog highlights 3 studies that use the EZM to test for anxiety-like behavior
![Taking opioids during pregnancy: short- and long-term consequences in rats consequences-of-opioids-during-pregnancy-on-rat-pups](https://www.noldus.com/static/images/core-blog/opioids-and-consequences-pregnancy-1592230728.jpg)
Taking opioids during pregnancy: short- and long-term consequences in rats
Women worldwide are suffering from opioid addiction. Many receive so-called opioid-maintenance therapy using bup, but consequences for both mother and baby are largely unknown.
![IR backlight in rodent behavioral testing ir-backlight-rodent-behavioral-testing](https://www.noldus.com/static/images/core-blog/ir-backlight-rodent-behavioral-testing.jpg)
IR backlight in rodent behavioral testing
How do mice act in complete darkness? Ann-Kristina Fritz and her colleagues ordered a large, round open field with IR backlight, custom made by Noldus, to investigate.
![Revealing the secret social role of the CA2 hippocampus secret-social-role-ca2-hippocampus](https://www.noldus.com/static/images/core-blog/secret-social-role-ca2-hippocampus.jpg)
Revealing the secret social role of the CA2 hippocampus
Aggressive behavior is adaptive for most species. But how is this aggressive behavior mediated in the brain? A recent study indicates that the hippocampus is a crucial neural component in mediating social recognition.