Yes, Maximohs, that's very definately emotional abuse (and physical)! You are not responsible for it, your adult parents are. I don't know what you can do to help your little brothers other than try to comfort them and maybe when you're older and on your own, try to support them (invite them to your place) a bit more.

My stepmother was abusive in the same way, hitting me and punishing me unrealistically for things that did not deserve it and calling me names, etc. I still remember her calling me a "dirty, old, black-hearted thing" when I had hurt her or she thought I had done something "wrong."

Do you have aunts or uncles you can go visit or stay with some, any teachers or good, older friends you can talk to? As much as possible I would try to stay out of your home/bad environment until you can leave for good. I do not know the laws in Norway or what help they have for parents like yours but I would cling to the knowledge that it isn't your fault and work toward getting out and making as many friends outside your home now as you can for you and your little brothers to try and counteract your mother's bad behavior.