I want a word that is defined as "the neural processes of encoding and processing pleasantstimuli."

No, Innociception is not wanted here. Another word will be appreciated.

I want a word that is defined as "the neural processes of encoding and processing pleasantstimuli."

For your references:

Nociception
From Wikipedia

Nociception (synonym: nocioception or nociperception) is defined as "the neural processes of encoding and processing noxious stimuli."[1] It is the afferent activity produced in the peripheral and central nervous systems by stimuli that have the potential to damage tissue.[2][3] This activity is initiated by nociceptors, (also called pain receptors), that can detect mechanical, thermal or chemical changes above a set threshold. Once stimulated, a nociceptor transmits a signal along the spinal cord, to the brain. Nociception triggers a variety of autonomic responses and may also result in a subjective experience of pain in sentient beings.[3] Nociceptive neurons generate trains of action potentials in response to painful stimuli, and the frequency of firing signals the intensity of the pain.[4]