Ricardo Iriart last saw his wife conscious four years ago. Every day since, he has visited Ángeles, often spending hours talking to her in hopes that she could hear him.

Consciousness is all of the things we experience each day that make up our awareness and experience of our lives. It is the individual awareness of your unique thoughts, memories, feelings, sensations ...

For decades, scientists have searched the brain for the origins of consciousness. But according to a new peer-reviewed study published in Neuroscience & Biobehavioral Reviews by researchers Anil K.