CNS	central nervous system
EEG	electroencephalogram
NREM	non-rapid eye movement
REM	rapid eye movement
LC	locus coeruleus
TMN	tuberomammillary nucleus
PB	parabrachial nucleus
VLPO	ventrolateral pre-optic area
DNA	deoxyribonucleic acid
GABA	γ-aminobutyric acid
NMDAR	N-methyl-d-aspartate receptor
AMPA	α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor
HC	high carbohydrate
LF	low fat
LC	low carbohydrate
HF	high fat
CPSQI	Chinese version of the Pittsburgh Sleep Quality Index
IDA	iron deficiency anaemia
BBB	blood–brain barrier
GlyR	glycinergic receptor
GPR39	G protein-coupled receptor 39
p.o.	per os