Too hot to think? Why extreme heat can affect how well our brain works
Ever feel that the arrival of summer sun makes you feel a bit dopey? You wouldn't be the only one. Soaring temperatures are known for their ability to slow our thought processes, making even everyday tasks seem like a baffling ordeal.
Staring at the summer sun can leave us feeling mentally sluggish. This is because extreme heat places added demands on our bodies and brains as they work to keep us cool. The brain and body continuously communicate with each other, and when temperatures rise, the hypothalamus - the brain's thermostat - kicks into gear to regulate internal temperature.
During hot weather, the body cools itself by diverting blood to the skin, flattening hair follicles and sweating. However, this cooling process requires significant energy from the brain, potentially leaving it with less capacity for cognitive tasks that demand sustained attention and focus. Research suggests that neurons - the brain's nerve cells - may also function differently at higher temperatures, as their electrical currents and chemical neurotransmitter release are influenced by temperature.
Dehydration, which is common in hot weather, can further impair cognitive function by reducing cerebral blood flow, altering neuron function and disrupting electrolyte levels. Additionally, hot weather can disrupt sleep patterns, adding another layer of cognitive impairment. While the extent to which heat affects our thinking may vary between individuals, measures such as staying cool, maintaining adequate hydration, and taking regular breaks can help mitigate temporary cognitive impairment.
Written by urgent.news from Medical Xpress's reporting — not their text. Machine-written — it may contain errors, so check the original before relying on it.
