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The brain is enormously costly to the rest of the body, in terms of oxygen and nutrient consumption. It can require up to 20 percent of the body's energy—more than any other organ—despite making up only 2 percent of the human body weight.
The blood–brain barrier is formed by the brain capillary endothelium and excludes from the brain 100% of large-molecule neurotherapeutics and more than 98% of all small-molecule drugs. [28] Overcoming the difficulty of delivering therapeutic agents to specific regions of the brain presents a major challenge to treatment of most brain disorders.
A brainship is made by inserting the disembodied brain and nervous system or malformed body of a human being into a life-support system, and connecting it surgically to a series of computers via delicate synaptic connections (a brain–computer interface). The brain "feels" the ship (or any other connected peripherals) as part of its own body.
The practice is meant to prove the two hemispheres of the brain are distinct identities, with one side thought to be female and one male, one side thought to be good and the other evil.
His cancer had begun in his lungs, a jagged mass of fecund, immortal cells that had slipped into his lymph nodes before finally reaching his brain, where they robbed him of first his balance and ...
The brain requires approximately 3.3 ml of oxygen per 100 g of brain tissue per minute. Initially the body responds to lowered blood oxygen by redirecting blood to the brain and increasing cerebral blood flow. Blood flow may increase up to twice the normal flow but no more. If the increased blood flow is sufficient to supply the brain's oxygen ...
Early experiments showed that adrenaline increases twitch, but not tetanic force and rate of force development in muscles. [38]One proposed explanation is Tim Noakes' "central governor" theory, which states that higher instances in the central nervous system dynamically and subconsciously control the number of active motor units in the muscle.
Ozempic is synonymous with weight loss for many people. Doctors explain benefits and risks of semaglutide and other GLP-1 drugs, and whether they're safe.