Keywords: بار گلوکز; Critical illness; Normoglycemia; Glucose load; Astrocyte; Microglia; Neuron; GAPDH; glyceraldehyde-3-phosphate dehydrogenase; GFAP; glial fibrillary acidic protein; GLUT-4; glucose transporter-4; IV; intravenous; MnSOD; manganese superoxide dismutase;