Metabolic syndrome' in the brain: deficiency in omega-3 fatty acid exacerbates dysfunctions in insulin receptor signalling and cognition Free full text interesting paper.
It's worth making the effort to understand what they were actually doing.

Here is an article on the same paper.
This Is Your Brain On Sugar: Study in Rats Shows High-Fructose Diet Sabotages Learning, Memory

Don't forget that the power of omega 3 to resolve inflammation is relative to the intake of omega 6 from seed/grain oils. If you've got 20~30 hooligans throwing petrol on a fire and only one firefighter the hooligans will succeed. If your diet is providing 20times the amount of omega 6 veggie oils (Corn/Soy/sunflower etc) then just adding a bit of omega 3 isn't going to solve the problem. You've got to stop all sources of dietary inflammation if you want to see the benefit from omega 3 intake in mitigating the effects of excessive fructose intake.

Also remember Vitamin D needs to be at 50ng/ml 125nmol/l to fully achieve it's anti inflammatory effect and it requires MAGNESIUM to convert from plasma form to active form. (most people will not be getting Magnesium RDA)