In my opinion nothing. Chakras if I remember correctly are said to be our life force energy, therefore they're always open and are located in our etheric body. There is much talk of the need in opening and closing chakra's to communicate with those in the spirit world. I personally don't bother with them; it's my experience that chakras are not necessary to my attunement and blending with spritual energies for communication. So it will be the same for other people surely! When we receive information from spirit, using the senses of the clair's; it comes via our minds first either as images or thoughts.