One of the key components of neuro is the huge amount of movement or changes in the sound. Other guys mentioned Reese basses which are great starting points for neuro sounds. You can find a million tutorials on making Reese basses on YouTube but the general principle is you have two saw waves which are moving in and out of phase with each other. You can do this by detuning, or playing two notes at once. You generally want to use saw waves as they are the most harmonically rich and the bulk of the sound comes from messing with the harmonics with filters so the more the better. Square waves can also be used if you want a bit more of a 'hollow' sound. The rest of the idea of movement from neuro generally comes from pitch bending and filters. Pitch bending is pretty self explanatory (but if you need someone to mention more just ask). Filters with the cutoff and resonance automated so they change over time help creat that characteristic neuro sound. I am a huge fan of putting a notch filter in, automating or putting an lfo on it, then compressing and saturating/distorting it to add more harmonics back in. Another cool technique that people use is volume automation. There is a guy on YouTube named spire who goes in depth into this (
http://youtu.be/GLROl40aktY). Hope this helps! If you have any more questions, just ask!