Fig. 1
From: Remote collection of electrophysiological data with brain wearables: opportunities and challenges
Comparison of EEG data collection hardware. (A) shows (left to right): a typical medical EEG setup with a high density of wired electrodes; a research-grade wearable cap with wireless electrodes; a research-grade Quick-32r headset; a research-grade EPOC X wearable with 14 electrodes; and a Muse 2 consumer-grade wearable with 4 recording electrodes. (B) shows a column of EEG wearables (top to bottom: Muse 2, Neurosity Crown (Introducing the Crown | Neurosity 2022; This ‘Personal Brain Computer’ Boosts Productivity By Sensing Your Brainwaves And Playing Music From Spotify, 2021), EPOC X, Quick-32r). Examples of additional wearables available on the market (not shown above) include: BrainBit(Wearable EEG headband – BrainBit, 2022) (EEG headband with 4 recording electrodes), Neurosky MindWave (Rieiro et al. 2019) (single electrode EEG wearable), and Neuroon (Liang and Chapa Martell 2018) (EEG wearable sleep mask). (C) shows an overview of the: number of sensors, common applications, EEG characteristics, and outcomes that are commonly related (but not limited) to each grade of EEG hardware