Blurs

You are reading these words. You can hear sounds around you. You can remember yesterday. You can imagine tomorrow. You can feel pain, recognise a face and wonder what it means to be alive. All of this feels completely ordinary. But scientifically, it is extraordinary. Somehow, electrical and chemical activity inside roughly three pounds of biological tissue is associated with the experience of being you. We know an enormous amount about the brain. We can observe neurons firing. We can map brain regions. We can measure electrical activity and watch networks communicate. We can even manipulate brain activity and change perception, memory and behaviour. And yet one enormous question remains: Why is there an experience at all? The brain clearly matters Before going further, there is an important distinction. There is overwhelming evidence that consciousness is intimately connected to the brain. Damage particular brain systems and consciousness can be profoundly altered. Anaesthesia can rev...