my brother uninates in his room

my brother is a very intelligent 11yr old boy, he is the youngest and my mom considers him a sort of only child because of the age difference between him and mine and our two other siblings, I am the second youngest with a nine year difference.  I've been away at school but recently moved back in. He's had a few bed wetting instances from ages 5-9 after watching scary movies(which isn't allowed in our house) but nothing too serious. but in the past two months hes been urinating in his room, first in open areas- by his desk and bed, but after getting caught and punished(no t.v video games ect.) we thought he stopped but we would eventually smell the urine only to find out he's been urinating in his closet and under his desk. At first we assumed it was his fear of the dark, but we always leave the bathroom light on at night  just for him. When we asked him why he said from watching a graphic content show (that he showed to be mature enough to watch) so the show was banned yet he still urinates. it's very annoying and he is seemingly embarrassed by it, my mom had made him clean it up, banned him from his room,  but he completes his duration of punishment and does it again. My mom says he's acting out from lack of attention but in my opinion he gets too much attention he attends a small school with small class sizes, I'm not home all the time but when I am, I devote an allotted time to spend with him. What will it take for this behavior to stop, what can I do to help?

[adciscool]

I think your mom should give him a spanking then a punishment. If that doesn't work get him consoling pronto.

[AnnieBrooke]

In your mom's shoes, I'd check in with a child therapist.  Despite your helpfulness, you are his sibling not his parent, so you're not going to be a dispassionate advisor.  (Siblings ALWAYS think the youngest gets to much attention.)   I will say that kids who have peeing issues usually have stress.  Try to cut him a little sympathy, and let your mom (with I hope a professional) try to get to what is the problem.

[allmymarbles]

This is not normal behavior for a boy his age. Have you noticed any other peculiarities?