A new brain imaging study has found that our brains are hardwired which stops us from drinking more water than necessary.
The study led by the Florey Institute of Neuroscience & Mental Health and the University Of Melbourne, explained a 'stop mechanism' that determines brain signals telling the individual to stop drinking water when no longer thirsty and the brain effects of drinking more water than healthy.
Derek Denton, the researcher from the university said that the study provided insight into the human instincts that determine survival behaviour and medical importance.
It is proved that different areas of the brain involved in emotional decision-making, which were activated when people drank water after becoming thirsty and when study participants followed instructions to keep drinking when no longer thirsty, he said.
"The brain regions determining the signals to stop drinking have not previously been recognized in this context. It identifies an important component in regulation and this 'stop mechanism' may prevent complications from excessive water intake," he explained.
Overdrinking can reduce the salt concentration of the blood which lead to the swelling of the brain, a potentially fatal condition called polydipsia (increased thirst), which has been found in some patients with schizophrenia (a psychiatric disorder) and in some marathon runners.