New non-invasive technique to measure brain activity

The brain of the animal kingdom is quite more complex in what we perceive and understand than it remains unsorted. It presents about 2 to 3% of the body weight, and nearly 15 to 20% of the blood circulates to the brain from the heart. Targeting the study on blood flow would solve the major complications in the brain such as strokes, subarachnoid hemorrhages, and even traumas. As of now, doctors rely on techniques such as MRI, computed tomography scanners to diagnose brain dysfunctions. However, these instruments are costly, and so the researchers have found a noninvasive method to ease the situation.

Novel technique

Scientists from the University of California, Davis identified a new method to detect the brain blood flow with the help of light. This method is based on functional interferometric diffusing wave spectroscopy or fiDWS is cheap, and can definitely help in diagnosis. This device overcomes the failure of near-infrared light spectroscopy where the signal is weak to fluctuate back. Rather this method uses interferometry by means of which the light waves superimposes or cancel each other. Consequently, a strong light wave boosts the weak signal wave and enhances the results.

The study

Neurologists achieved the study by activating the prefrontal cortex in the brain. They split the laser beam into samples and reference paths. The sample beam enters the patient’s head and it gets potentiated by the reference beam before reaching the detector. With the use of interferometry, the weak signal produces the output in the light-detective chip instead of expensive photons counting detectors. The experts used software to find the blood flow index for different locations in the brain. This method is preferably cost-effective and also measures the blood flow rapidly will pave way for easy diagnosis.

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Source: Medical Xpress

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