From the engine in your car to the components in your laptop, mechanical systems tend to heat up when they're working harder. Now new research has revealed that the same can be said of the brain – and it runs hotter than was previously thought.
from the Medical Research Council Laboratory of Molecular Biology in the UK.
Previously, those measurements taken from people with brain injuries had been the primary insight scientists had into brain temperatures – which isn't the same as capturing the state of the brain during everyday life.Here, the team used a technique called magnetic resonance spectroscopy – measuring chemical patterns through magnetic fields – to measure brain temperature non-invasively in 40 healthy volunteers, aged from 20 to 40 years old.
Female brains were on average around 0.4°C warmer than male brains, most likely due to the menstrual cycle, while the highest brain temperature recorded was 40.9 °C . Daily variations averaged around 1 °C , with the outer parts of the brain generally cooler.says O'Neill The researchers have been able to use their work to put together a 4D temperature map of the brain. They're hoping that it can be used as a reference guide for what a healthy brain should look like – although much more data needs to be gathered from a much larger group of people to make it really useful.Further tests on 114 people who had suffered a traumatic brain injury showed that in these cases the brain temperature varied even more, from 32.6 °C to 42.3 °C .
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