There are multiple definitions:

1. impaired fasting glucose(English)

   • IR-NGT, IS-NTG, NGT, OGTT, SI, SPIS, DM, FPG, IGT, FGL, MHD, FPI
   • Diabetes, Insulin
   • https://doi.org…2916-019-1440-4
   • https://doi.org…155/2015/675245

2. inferior-frontal gyrus / frontal operculum(English)

   • MTL, OFC, ATL, BG, PMC, STG, TPJ
   • Brain (dys)function, Anatomy
   • https://doi.org…0415-018-8762-6

3. index fingers-ground(English)

   • aspect of spinal mobility
   • FTF, IFG, LBP, LS, ODI, SF-MPQ, VAS
   • Spine (or spinal cord), Disability, Rehabilitation
   • https://doi.org…390/jpm12050741