5-HT	serotonin
ACTH	adrenocorticotropic hormone
BBB	blood–brain barrier
BDNF	brain-derived neurotrophic factor
BEO	bergamot EO
CC-EO	cinnamomum cassia presl
CNS	central nervous system
CREB	cAMP-response element binding
CRH	corticotrophin-releasing hormone
DA	dopamine
EO	essential oil
EPM	elevated plus maze test
FRSA	free radical scavenging activity
FST	forced swimming test
GABA	γ-aminobutyric acid
GSH	glutathione
HPA axis	hypothalamic–pituitary–adrenal axis
LPS	lipopolysaccharide
MAPK	mitogen-activated protein kinase
MDA	malondialdehyde
MJ	methyl jasmonate
NAc	nucleus accumbens
OFT	open field test
OSN	olfactory sensory neuron
ROS	reactive oxygen species
TNF-α	tumour necrosis factor-alpha
TRP	transient receptor potential channels
VTA	ventral tegmental area
YYO	ylang-ylang EO