Grimace scales rank the changes in facial features which are related to pain intensity.
Jeffrey Mogil and his organization at McGill college developed the mouse grimace scale (MGS) (2) in which pain in mice is quantified according to objective and blinded scoring of facial expressions based totally on the Facial Action Coding system (FACS), as is achieved mechanically for the dimension of ache in nonverbal human beings.
The horse Grimace Scale (HGS) is a facial-expression-based totally ache coding gadget and may probably overcome the problems defined with the Obel evaluation.
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