Acral lick syndrome in animals shares similarities with OCD in humans.
Indicate whether the statement is true or false
Question 2
Placebo pain relief appears to work through endorphin circuitry, namely ___.
a. blocking endorphin receptors in the periacqueductal gray
b. inhibiting the release of substance P in the periacqueductal gray
c. facilitating endorphin release in the skin and muscles
d. facilitating endorphin release in the periacqueductal gray