training of rats with emotionally positive and negative reinforcements leads to increase in activity of acid ( ph of 5.0 ) and alkaline ( ph of 8.0 ) nucleases in the neocortex , hippocampus , areas of the midbrain ( including the hypothalamus , subthalamus , and thalamus ) , and caudal section of the brain stem .
C0025462
midbrain
C0006121
brain stem