in addition , the brain and pituitary content of beta-endorphin like immunoreactivity was lower in the protein malnourished rats , and three different forms of training ( 50 tone-footshock shuttle avoidance trials ; 50 tones alone ( habituation ) ; 50 footshocks alone ) caused a depletion of brain beta-endorphin like immunoreactivity in the normal , but not in the malnourished rats .
C0423896
content
C0006104
brain