α2BR Ab	α2BR antibody;
α2CR Ab	α2CR antibody;
α2DR Ab	α2DR antibody;
Acb	nucleus accumbens;
Amy	amygdala;
Arc	arcuate nucleus;
Cpu	caudate putamen nucleus;
GRN	gigantocellular reticular nucleus;
Hb	habenular nucleus;
Hip	hippocampus;
HWT	hindlimb withdrawal threshold;
IgG	nonspecific immunoglobulin;
IVC	inferior vena cava;
LC	locus coeruleus;
Mφ	blood mononuclear macrophages;
Myo	myocardium;
NRM	nucleus raphe magnus;
NTS	nucleus of the solitary tract;
PBN	parabrachial nucleus;
Pf	parafascicular nucleus;
PAG	periaqueductal gray;
PVN	hypothalamic paraventricular nucleus;
PVT	paraventricular thalamus;
SCDH	spinal cord L4-L6 dorsal horn;
Sm	thalamic nucleus submedius;
SN	substantia nigra;
SVC	superior vena cava;
VMH	ventromedial hypothalamic nucleus;
Yoh	yohimbine