Board Thread:Naruto Discussions/@comment-12509038-20140730054526/@comment-5407586-20140802183656

Archangel489 wrote: but it was stated that the sharingan affects you brain Sorry, I think you may be slightly confused about what happens between the Sharingan and the brain. When an Uchiha feels deep emotions, his/her brain releases a special chakra that affects the optic nerves, creating the Sharingan. Kakashi isn't an Uchiha, so he can't do that. Not to mention he no longer has a Sharingan, since Naruto just restored the eye Kakashi had before gaining Obito's Sharingan.