AMR	anisotropic magnetoresistance
BCI	brain–computer interface
CNTs	carbon nanotubes
CPE	composite-conductive polyethylene
DOS	density of states
ERF	event-related field
FDA	Food and Drug Administration
GaN	gallium nitride
GRIN	gradient-index
MEG	magnetoencephalography
MR	magnetoresistive
NM	non-magnetic
PC	polycarbonate
PEC	photoelectrochemical
PEG	poly (ethylene glycol)
PI	polyimide
SNR	signal-to-noise ratio
TMR	tunneling magnetoresistance
UEA	Utah electrode array
AC	alternating current
CIP	current-in-plane
COC	cyclic olefin copolymer
CPs	conductive polymers
EEG	electroencephalogram
EMI	electromagnetic interference
FM	ferromagnetic
fNIRS	functional near-infrared spectroscopy
GMR	giant magnetoresistance
MEAs	microelectrode arrays
MEMS	microelectromechanical systems
MTJ	magnetic tunnel junction
nT/pT/fT	nano/pico/femto tesla
PDMS	polydimethylsiloxane
PEDOT	Poly (3,4-ethylenedioxythiophene)
PLGA	poly (lactic-co-glycolic acid)
PV	photovoltaic
SV	spin-valve
TTX	tetrodotoxin