I have not heard of any research on these items. A good source for info is: Dr. Mona Lisa Schultz, a pHD. in neurology and a neuropsychiatrist. From what I gather, every time you learn new material, you form new synaptic connections in the brain...and therefore, I believe, new neural pathways are established. Sort of like building muscle by weight training.
This is a particular area of academic/professional interest for me.
This is a particular area of academic/professional interest for me.