A1 Refereed original research article in a scientific journal
A Low Power Multi-Class Migraine Detection Processor Based on Somatosensory Evoked Potentials
Authors: Taufique Zain, Zhu Bingzhao, Coppola Gianluca, Shoaran Mahsa, Bin Altaf Muhammad Altaf
Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication year: 2021
Journal: IEEE Transactions on Circuits and Systems II: Express Briefs
Journal name in source: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Journal acronym: IEEE T CIRCUITS-II
Volume: 68
First page : 1720
Last page: 1724
Number of pages: 5
ISSN: 1549-7747
DOI: https://doi.org/10.1109/TCSII.2021.3066389
Migraine is a disabling neurological disorder that can be recurrent and persist for long durations. The continuous monitoring of the brain activities can enable the patient to respond on time before the occurrence of the approaching migraine episode to minimize the severity. Therefore, there is a need for a wearable device that can ensure the early diagnosis of a migraine attack. This brief presents a low latency, and power-efficient feature extraction and classification processor for the early detection of a migraine attack. Somatosensory Evoked Potentials (SEP) are utilized to monitor the migraine patterns in an ambulatory environment aiming to have a processor integrated on-sensor for power-efficient and timely intervention. In this work, a complete digital design of the wearable environment is proposed. It allows the extraction of multiple features including multiple power spectral bands using 256-point fast Fourier transform (FFT), root mean square of late HFO bursts and latency of N20 peak. These features are then classified using a multi-classification artificial neural network (ANN)-based classifier which is also realized on the chip. The proposed processor is placed and routed in a 180nm CMOS with an active area of 0.5mm(2). The total power consumption is 249 mu W while operating at a 20MHz clock with full computations completed in 1.31ms.
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