Belief, Brain Chemistry & the Construction of Perceived Reality

The thesis, in one breath

Belief can become a biological cause through prediction, attention, bodily regulation, learning, and action. It can alter experienced reality and behavior-mediated outcomes. Conviction alone cannot select neurotransmitters, erase trauma, or command external events.

The territory · abstract

Can a person deliberately believe an idea so intensely that the brain changes its chemistry, reorganizes its processing, and ultimately changes reality? Modern neuroscience supports a qualified version of this proposal and rejects its strongest version. Beliefs and expectations are not immaterial spectators: they are physically implemented states of a living brain-body system. Through attention, appraisal, prediction, learning, autonomic regulation, endocrine and immune signaling, and behavior, they can alter perception, pain, emotion, symptoms, choices, relationships, and exposure to opportunities. Repeated experience can modify synaptic efficacy, network recruitment, habits, and even measurable brain structure.

Placebo and nocebo experiments provide unusually direct evidence that meaning and expectation can recruit endogenous opioids, dopamine, autonomic responses, and conditioned immune effects. Trauma provides a different demonstration of experience-dependent biology: severe threat can recalibrate learning, memory, arousal, interoception, stress physiology, and avoidance, although post-traumatic stress disorder is neither inevitable nor adequately described as permanent “brain damage”. The popular causal story remains misleading. There is no single reservoir called “brain chemistry” that the will can dial up or down, no neurotransmitter that maps one-to-one onto happiness or fear, and no scientifically privileged fixed “natural state” from which belief simply pushes the brain.

Neural function is electrochemical, networked, embodied, developmental, and continuously regulated. Dopamine, serotonin, norepinephrine, cortisol, oxytocin, and endogenous opioids have multiple receptor-, circuit-, timescale-, and contextdependent effects. Psychiatric illness is not generally explained by a simple chemical imbalance; rejecting that slogan does not imply that medication is ineffective. Conscious practice can change processing, but mainly indirectly and probabilistically.

The rest of the territory is in the map itself.

Place names on this map

Torkaman, H. R. (2026). Belief, Brain Chemistry and the Construction of Perceived Reality: Emotion, nonconscious behavior, trauma, plasticity, placebo biology, deliberate change, and scientific limits [Working paper]. SSRN. https://doi.org/10.2139/ssrn.7544509