Deepinder Goyal has for the first time shared a validation study claiming that Temple, besides tracking signals linked to the brain and body, will also track changes in brain blood flow. He shared the study testing this feature.
Unlike usual health-tracking wearables, Temple is not worn on the wrist or finger. Instead, the tiny device sits on the side of the forehead, around the temple.
The study tests Temple’s Brain Flow index against Transcranial Doppler (TCD), an established ultrasound technique used to measure blood-flow velocity in the brain. Titled “Concordance Between a Temple-Worn Optical Wearable and Transcranial Doppler During Exercise and Postural Transitions in Healthy Adults,” the study looks at whether Temple’s Brain Flow reading changes in the same way as brain blood-flow measurements from TCD.
The researchers reportedly tested Temple on 23 healthy adults to see whether its Brain Flow reading could pick up changes in brain blood flow.
During the research, participants were first asked to cycle and then rest. As expected, their brain blood-flow velocity increased while they were exercising and decreased during recovery. According to researchers, Temple’s Brain Flow reading followed the same pattern, suggesting the wearable picked up the change in blood flow.
The researchers then tested the device in a different way by asking participants to move between standing and lying down. After this activity the brain blood-flow velocity of the participants increased, while their heart rate actually decreased. Temple’s Brain Flow reading reportedly increased too.
