BOC Domain 4 Treatment and Rehab 2026 – All-in-One Therapeutic Modalities Practice Test for Exam Success!

Endorphins primarily modulate pain within the central nervous system. They’re produced in areas like the hypothalamus and pituitary and then act on opioid receptors in CNS pathways, especially in the brain and the dorsal horn of the spinal cord, to dampen pain transmission and alter perception. This central action reduces how pain signals are processed and felt, which is why the CNS is the correct site. The peripheral nervous system isn’t the main stage for endorphin effects, and saying “brain only” or “spinal cord only” is too narrow because both brain regions and spinal cord pathways are involved in the endorphin-mediated analgesic response.