On brain hemispheres:
The neuroscience of introspection seems to be that it is conducted by the right hemisphere of the brain. “The right hemisphere thinks in pictures and learns kinesthetically.” (Jill Bolte Taylor)
“The first appreciation of anything comes to us via the right hemisphere, and the ultimate understanding of it in context does so also. Some very subtle research by David McNeill, amongst others, confirms that thought originates in the right hemisphere, is processed for expression in speech by the left hemisphere, and the meaning integrated again by the right (which alone understands the overall meaning of a complex utterance, taking everything into account). More generally I would see the left hemisphere as having an intermediate role: it ‘unpacks’ what the right hemisphere knows, but then must hand it back to the right hemisphere for integration into the body of our knowledge and experience." (McGilchrist, The Master and His Emissary.)