AD	Alzheimer’s disease
AMG	amygdala
CP	cribriform plate
DAT	dopamine transporter
DA	dopaminergic
EC	entorhinal cortex
fMRI	functional magnetic resonance imaging
GL	glomeruli
HDB	horizontal limb of the diagonal band of Broca
MCI	mild cognitive impairment
MDD	major depressive disorder
MDT	medial dorsal thalamus
MMSE	mini-mental status examination
OB	olfactive bulb
OE	olfactory epithelium
OFC	orbitofrontal cortex
ONL	olfactory nerve layer
OT	olfactory tract
ORNs	olfactory receptor neurons
PC	piriform cortex
PD	Parkinson’s disease