Quotes About Brain processes

Our visual cortexes are wired to quickly recognize faces and then quickly subtract massive amounts of detail from them, zeroing in on their essential message: Is this person happy? Angry? Fearful? Individual faces may vary greatly, but a smirk on one is a lot like a smirk on another. Smirks are conceptual, not pictorial. Our brains are like cartoonists - and cartoonists are like our brains, simplifying and exaggerating, subordinating facial detail to abstract comic concepts.

All that happens in the human brain is but the result of electro-chemical reactions. Be it of love, hate, of pleasure, of suffering, of imagination, or all other states of mind, sentiment or sickness; the process depends in every case on the chemical reactions produced in the interior of the brain, and the resulting electrical impulses or messages, be they visual, auditory, based on memory, or an interpretation of new events based on elements that one has in the memory.

Consciousness is the biologically useless by-product of certain brain processes. Jet engines roar loudly, but the noise doesn't propel the aeroplane forward. Humans don't need carbon dioxide, but each and every breath fills the air with more of the stuff. Similarly, consciousness may be a kind of mental pollution produced by the firing of complex neural networks. It doesn't do anything. It is just there.

Charles Sherrington, the founder of modern neurophysiology, contended in 1947 that brain processes alone cannot account for the full range of subjective mental phenomena, including conscious free will. "That our being should consist of two fundamental elements offers, I suppose, no greater inherent improbability than that it should rest on one only," he wrote.

NDEs seem instead to provide direct evidence for a type of mental functioning that varies "inversely, rather than directly, with the observable activity of the nervous system." Such evidence, we believe, fundamentally conflicts with the conventional doctrine that brain processes produce consciousness, and supports the alternative view that brain activity normally serves as a kind of filter, which somehow constrains the material that emerges into waking consciousness.[

three different levels of the brain: the automatic, prewired layer, called the visceral level; the part that contains the brain processes that control everyday behavior, known as the behavioral level; and the contemplative part of the brain, or the reflective level.