Why might a patient's body temperature affect EEG readings?

The relationship between a patient's body temperature and EEG readings primarily revolves around the impact of altered temperature on neuronal activity. As temperatures fluctuate, the excitability of neurons changes. A rise in temperature can enhance neuronal activity, potentially leading to increased synchrony or excitability in the brain's electrical signals. Conversely, a decrease in temperature may depress neuronal function, resulting in slower brain waves or even suppressing certain types of brain activity altogether.

Monitoring body temperature during EEG recordings is critical because deviations from normal physiological ranges can lead to considerable variations in EEG patterns. For instance, hyperthermia can contribute to abnormal discharges or seizure activity, while hypothermia may create a damping effect, which can alter the typical EEG morphology. Understanding this relationship helps healthcare providers interpret EEG findings accurately in light of the patient's physiological state, reinforcing the importance of maintaining a stable body temperature during the study.