Design of a two channel prefrontal lobe EEG acquisition device to monitor engagement of underdeveloped children
This neuro technology research focuses on developing a wearable, miniature, ambulatory electroencephalogram (EEG) with other sensing modalities for long duration monitoring of neurological disorder patients in natural settings using CPS-based BCI approach. This project has been initiated with funding from Strengthening Communities Initiative (SCI) capacity building grant with collaboration of Special Kids & Families (SKF).
Neuronal firings generate tiny electrical potentials as information is transmitted via neurotransmitter in synaptic bulb. Scalp EEG can monitor such collective activities as oscillatory waves that relates to the mental states, cognitive loads, stimulations and perceptions. The developed system was realized through hardware-software co-design that allows us to record such EEG activities of the brain from the prefrontal cortex through the device in a natural setting during regular activities. The system composes of 4-stage biopotential amplifier with active analog filtering, 16b ADC on PSoC3 micro-controller, along with other peripherals and power management circuits. The hardware is miniature (size: 2.2” x 0.8” x 0.36”, weight: 41.8 gm with 800 mAh Li-ion battery and 3 snap leads) such that it can be concealed within a headband. The collected data can be wirelessly transmitted for on-line monitoring or stored on-board for offline analysis, and allows co-processing of multimodal sensing with contextual perspective.
Application areas we are currently actively pursuing are engagement study of children with developmental delays (ASD, ADHD, cerebral palsy), generalized or partial seizure detection and advisory system for epileptic patients, and real-time monitoring of Alzheimer’s, TBI, PTSD or other neurological disorders in natural settings. The platform might be suitable for other BCI studies including thought control computing, or electronic mental health monitoring.