AF	anterior funiculus
CNS	central nervous system
[Cl−]i	intracellular chloride ion concentration
CNS	central nervous system
DH	dorsal horn
DRG	dorsal root ganglion
dI1–6, dIL, dILA, dILB, MN, V0–3, V0D, V0V, V2a, and V2b	neuronal groups, classes, derived from their distinct domains of spinal cord ventricular zone
dP1–dP6, vMN, and vP0–vP3	domains of the ventricular zone in embryonic spinal cord
E	embryonic day
FP	floor plate
GABA	γ-aminobutyric acid
GAD	glutamic acid decarboxylase
GAT-1, GAT-2, and GAT-3	GABA transporter 1, 2, and 3
Gly	glycine
GlyT1 and GlyT2	glycine transporter 1 and 2
GFP	green fluorescence protein
IPSP	inhibitory postsynaptic potential
KCC2	potassium (K+), chloride (Cl−) cotransporter 2
LF	lateral funiculus
NKCC1	sodium (Na+)-K+-2Cl− cotransporter 1
P	postnatal day
PF	posterior funiculus
R	GABAA and glycine receptor
RP	roof plate
SHMT	serine hydroxy-methyltransferase
VDCC	voltage-dependent calcium channel
VIAAT	vesicular inhibitory amino acid transporter
VGAT	vesicular GABA transporter
VH	ventral horn
VZ	ventricular zone
I-IX	laminar number of the gray matter
1	GAT-1
3	GAT-3