There are multiple definitions:

1. periaqueductal gray [matter](English)

   • shows increased FC with the prefrontal cortex, cingulate gyrus, and motor cortex but decreased FC with the basal ganglia, dorsal lateral thalamus, internal capsule and prelimbic cortex in the rat model. The atypical FC of the PAG with brain regions in the rat model that are involved in nociception, somatosensory processing, emotional processing, and pain modulation are consistent with the clinical data from migraineurs
   • HFS, LFS, BST, EA, GP, SLEA, ST, VA, fMRI, FC, IS, vlPAG, VTA, DMH, PVH, CeA, RVM, PPH, GABA, LHA, LPT
   • Brain (dys)function, Pain, Headache, Stress (test), Adaptation & plasticity
   • https://doi.org….1002/hbm.23917
   • https://doi.org…598-017-04060-6
   • https://doi.org…neu.2011.05.003
   • https://doi.org….1002/cne.20728
   • https://doi.org…nins.2019.00375

2. pregnancy-associated glycoprotein(English)

   • bPAG
   • Obstetrics, Pregnancy

3. polyacrylamide gel(English)

   • a polymer formed from acrylamide subunits, and synthesized as a simple linear-chain structure or cross-linked
   • PAGE, SDS-PAGE
   • Environment, Surgery
   • https://en.wiki…/Polyacrylamide

4. phenylacetylgutamine(English)

   • AAA, ADR, AHR, BA, FXR, GPR41, MAPK, OLFR78, PERK, Phe, PXR, SCFA, TGR5, TMA, TMAO, Trp, Tyr
   • Microbiome, Cardiology, Metabolism
   • https://doi.org…NAHA.123.067547

5. posterior augmented glenoid(English)

   • aTSA, NAG, OA, PE, RTSA, slTSA
   • Shoulder and other joints, Surgery
   • http://pubmed.n…h.gov/26631201/