PO	Postoperative pain
PEA-m	Micronized palmitoylethanolamide
NGF	Nerve growth factor
p-ERK	Phospho-extracellular signal-regulated kinases
Iba1	Ionized calcium binding adaptor molecule 1
GFAP	Glial fibrillary acidic protein
BDNF	Brain-derived neurotrophic factor
NF-κB	Nuclear factor kappa-light-chain-enhancer of activated B cells
NSAIDs	Non-steroidal anti-inflammatory drugs
CNS	Central nervous system