Soft, curved electrode systems capable of integration on the auricle as a persistent brain–computer interface

• DOI: 10.1073/pnas.1424875112
• Publication Date: 2015-03-17T02:56:33Z
• Authors: James J. S. Norton; Dong Sup Lee; Jung Woo Lee; Woosik Lee; Ohjin Kwon; Phillip Won; Sung-Young Jung; Huanyu Cheng; Jae-Woong Jeong; Abdullah Akce; Stephen Umunna; Ilyoun Na; Yong Ho Kwon; Xiao-Qi Wang; ZhuangJian Liu; Ungyu Paik; Yonggang Huang; Timothy Bretl; Woon-Hong Yeo; John A. Rogers
• Keywords: Interface (matter); Auricle

Significance Conventional electroencephalogram (EEG) recording systems, particularly the hardware components that form physical interfaces to head, have inherent drawbacks limit widespread use of continuous EEG measurements for medical diagnostics, sleep monitoring, and cognitive control. Here we introduce soft electronic constructs designed intimately conform complex surface topology auricle mastoid, provide long-term, high-fidelity data. Systematic studies reveal key aspects extreme levels bending stretching are involved in mounting on these surfaces. Examples persistent brain–computer interfaces, including text spellers with steady-state visually evoked potentials event-related potentials, viable operation over periods weeks demonstrate important advances alternative interface technologies.