It can be difficult to assess pain in very young and premature infants. Simply watching for changes in posture or expression isn't always enough to indicate how much discomfort a newborn is feeling. Therefore, researchers from University College London were looking for a better way to determine how much pain a baby is feeling.
They used electroencephalography (EEG), electrocardiography (ECG) and electromyography (EMG) to indirectly detect evidence of pain. These non-invasive devices record electrical activity in the brain, the heart and in muscle, respectively. Infants were hooked up to the devices and recordings were made of three events: a heel tap with a rubber bung, a touch with a lancet that did not pierce the skin, and a medically required heel lance to collect blood. EEG, ECG and EMG results were compared for the three events. The electrical data correlated well with presumed pain levels.
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