case_images: PMC8180893_01
case_images: Neurobiological systems engineering model of the relationship of pain, pleasure and opioid tone.
case_images: fpsyg-12-657952-g0001.jpg
case_images: PMC8180893_01_fpsyg-12-657952-g0001.jpg
case_images: F1
case_images: CPT of 39 s a week later. CPT falling from 190 s to 28 or 39 s is thought to represent decreased central nervous system opioid tone, moving A toward the top of the inverse parabolic function in Figure 1. Closeness caused pleasure rather than pain.