AD	Alzheimer’s disease
CCD	canine cognitive dysfunction
c.	centuries
DMN	default-mode networks
EQ	encephalization quotient
HPA	hypothalamic–pituitary–adrenal (axis)
NCDS	neural crest domestication syndrome
NFTs	neurofibrillary tangles
MRI	magnetic resonance imaging
Mya	million years ago
Kya	kilo years ago (kilo corresponds to a thousand)
PFC	prefrontal cortex