What sorts of signals does the brain use to communicate sensations, thoughts and actions?

Question: What sorts of signals does the brain use to communicate sensations, thoughts and actions?
- Keywords:
  brain,
  signal
Asked by H to Andres, Catherine, Darren, Ellie, Samantha on 12 Nov 2016.
- Andres Olivares del Campo answered on 12 Nov 2016:
  
  Hi!
  
  I am afraid I am not an expert (probably Darren can help) but my understanding is that they are electrical signals produced by chemical reactions. I do not know what exactly is different between the signal for a sensation, a thought and an action but I think they travel through different “channels” so that the brain interprets each of them differently.

Question: What sorts of signals does the brain use to communicate sensations, thoughts and actions?