QIF-T0089

Tremor and movement neurological profiling (IMU-based motor disorder detection and health inference)

Smartphone IMU sensors can detect pathological tremor patterns characteristic of neurological conditions: Parkinson's resting tremor (4-6 Hz), essential tremor (8-12 Hz), cerebellar tremor (3-5 Hz), and physiological tremor changes from medication, fatigue, or substance use. The mPower study (Bot et al. 2016) enrolled 16,000 participants and demonstrated that smartphone sensor data alone can distinguish Parkinson's patients from healthy controls with >90% accuracy. Beyond tremor, fine motor control degradation (touchscreen interaction patterns, typing dynamics) reveals cognitive decline, medication effects, intoxication levels, and fatigue. This is covert neurological diagnosis without the subject's knowledge or consent — the phone becomes a continuous neurological monitor. The data reveals protected health information about neurological conditions, substance use, and cognitive function from sensors that require no permission.