Table 3 Visual evoked potential signal processing devices used in each study

Feng et al. (2019) [18]

Not reported

Qiao et al. (2019) [19]

NIM-ECLIPSE

(MEDTRONIC, USA)

Toyama et al. (2018) [20]

Neuropack X1 MEB 2312

MEE 1232,

(NIHON KOHDEN, Japan)

(NIHON KOHDEN, Japan)

Nishimura et al. (2018) [21]

MEE 1232,

(NIHON KOHDEN, Japan)

Kurozumi et al. (2017) [22]

NIM-ECLIPSE E4

(MEDTRONIC, USA)

Luo et al. (2015) [23]

ISIS System

(INOMED, Germany)

Kamio et al. (2014) [7]

Neuropack X1 MEB-2312,

(NIHON KOHDEN, Japan)

Houlden et al. (2014) [9]

Cadwell Elite intraoperative monitoring machine

(CADWELL INSTRUMENTS, USA)

Chung et al. (2012) [24]

PROTEKOR TM 10 M

(XLTEK, Canada)

Sasaki et al. (2010) [6]

Synax 1100

Neuropack

(NEC MEDICAL SYSTEMS, USA)

(NIHON KOHDEN, Japan)

Chacko et al. (1996) [25]

Brain Atlas III system

(BIOLOGIC SYSTEMS, USA)