A new study published in Scientific Reports reveals that even small fluctuations in blood sodium levels can impact brain function. Researchers found that lower sodium concentrations, even within the normal healthy range, are linked to higher cortical excitability.
The study involved 42 healthy adults aged 18 to 30. Scientists measured blood electrolytes and used Transcranial Magnetic Stimulation (TMS) to evaluate brain responses. TMS stimulates the brain with magnetic fields, allowing researchers to calculate the Resting Motor Threshold (RMT).
Results showed that participants with lower sodium levels had lower RMT values, meaning their brains were more reactive to electrical impulses. This suggests that minor changes in sodium can affect how nerve cells conduct electricity and respond to stimulation.
The researchers noted that lower sodium levels did not correlate with other electrolytes like potassium, calcium, or chloride.
All participants’ sodium levels remained within the standard clinical range of 136–143 mmol/L. This challenges the assumption that small variations in sodium are insignificant for brain function.
Lower sodium may subtly influence electrical signals in the brain, affecting thought, movement, and overall neural stability. While the study does not prove causation, it highlights the importance of maintaining electrolyte balance for optimal brain activity.
Future research aims to explore whether adjusting sodium levels could directly modify cortical excitability. These findings could improve understanding of neurological conditions, memory, learning, and even treatment strategies for cognitive disorders.
Experts say the study emphasizes that blood chemistry, even within normal ranges, plays a key role in brain health. Consuming a balanced diet and avoiding extreme sodium fluctuations may support stable neurobiological function.
In short, lower sodium levels may be more important than previously thought. The study opens the door to new research on how electrolytes influence the brain and overall mental performance.
In other news read more about: Foods to avoid with high cholesterol
