2. The human brain cell can hold 5 times as much information as the Encyclopedia Britannica. Or any other encyclopedia for that matter. Scientists have yet to settle on a definitive amount, but the storage capacity of the brain in electronic terms is thought to be between 3 or even 1,000 terabytes. The National Archives of Britain, containing over 900 years of history, only takes up 70 terabytes, making your brain’s memory power pretty impressive!
8. Information travels at different speeds within different types of neurons. Not all neurons are the same. There are a few different types within the body and transmission along these different kinds can be as slow as 0.5 meters/sec or as fast as 120 meters/sec.
10. Brain freeze is a mystery. Nobody’s quite sure why a fast gulp of Slurpee can leave you feeling like a vice is crushing the inside of your head. We call it “brain freeze,” but the sensation is actually felt around the temples and the mask of the face; remember, the brain itself has no pain receptors. The best guess among scientists is that a cold drink, when rapidly consumed, shocks the trigeminal nerve, which is responsible for sensation to the face and head. The brain’s hypothalamus gets a message to create warmth and responds by dilating vessels around the nerve to heat the area with blood flow. But the sudden dilation causes pressure and a stunning wave of pain.
11. Brain surgery can be conducted while a patient is awake. Patients suffering from brain tumors or epileptic seizures may undergo surgery while awake. Rather than relying exclusively on brain-imaging technology, a neurosurgeon can speak to an awake patient to mark or “map” critical areas of the brain that control vision, language, and body movement, ensuring the procedure’s accuracy and safe outcome. The patient is anesthetized during the portion of surgery when doctors make their way through the cranium to the exposed brain.
No comments:
Post a Comment