when corrections were made for a small difference in body temperature between nitrous oxide -- breathing animals and those breathing air nitrous oxide was found to significantly increase local cmrg1 in some subcortical structures by 15-25 % ( red nucleus , thalamus , geniculate bodies , and superior colliculus ) , and to decrease local cmrg1 in nucleus accumbens and sensorimotor cortex by comparable amounts .
C0039729
thalamus
C0017405
geniculate bodies