Photoencephalography

• 

  Human Brain Literally Emits Light Through Your Skull, Study Finds

  Scientists reveal the brain emits faint light that reflects mental activity, opening a new path for non-invasive brain monitoring.

• 

  Scientists Discover Your Brain Secretly Glows And It Could Reveal What You're Thinking

  A new study led by Canadian researchers suggests the human brain emits a faint glow that varies with activity.