I want to know the answer to the following question:
What type of receptors does the brain lack?
All the background I'm provided with is that "Recordings of brain activity can be made using electrodes, either glued to the scalp as in EEG studies, or implanted inside the brains of animals for extracellular recordings, which can detect action potentials generated by individual neurons.". Is that enough to answer the question?
Answer: no