Neurobiology of DPDR: Frontolimbic Regulation and the Role of Insula/PFC

Depersonalization-derealization disorder (DPDR) is often perceived as something mysterious or inexplicable. In reality, this state can be understood through brain mechanisms. Research shows that DPDR is not a breakdown, but rather a special protective mode the brain enters under overload to shield the psyche.

Which brain regions are involved?

Prefrontal Cortex (PFC) — the center of rational control. In DPDR, its activity increases: the brain tries to “take over” and reduce emotional reactivity.
Insula — responsible for body awareness and the sense of “I am here.” In DPDR its activity decreases, leading to the feeling of detachment from oneself.
Amygdala and cingulate cortex — shape emotional coloring of perception. In DPDR they show reduced activity, so the world appears “flat” and devoid of feelings.

What does this mean?

DPDR can be seen as an energy-saving mode. When stress becomes overwhelming, the brain strengthens rational control (PFC) while “dimming” emotions and body signals (insula, amygdala). This prevents overload but subjectively feels like disconnection.

Scientific evidence

Sierra & Berrios (2002) — showed reduced amygdala response and increased PFC activation in DPDR.
Medford et al. (2006) — demonstrated decreased insula activity related to body self-awareness.
Critchley (2004; 2023) — confirmed the insula’s central role in interoception and sense of self.
Ludwig (2024) — described DPDR as impaired sensory integration of self-related signals.
Phillip (2025) — provided new data on dysregulation of brain networks (DMN and FPN), explaining perceptual disconnection.

Comparison with other conditions

Anxiety: excessive amygdala activity (too many emotions).
Depression: general slowing, with both emotions and control reduced.
DPDR: excessive control, while emotions and body perception are “switched off.”

Key takeaways

DPDR is not a brain malfunction but a protective mode.
The state is reversible: brain networks are intact but shifted in priorities.
Understanding neurobiology helps reduce fear and see DPDR as a temporary adaptation, not a life sentence.

DPDR is the brain’s way of coping with overload. Behind the feeling of “absence” are concrete processes in the PFC and insula — making the state understandable and recoverable.

References

Sierra M., Berrios G. (2002). Depersonalization: Neurobiological perspectives. Biological Psychiatry.
Medford N., Sierra M., et al. (2006). Functional neuroimaging of depersonalization disorder. Psychiatry Research.
Critchley H.D. (2004, 2023). The insula and interoception. Brain Structure and Function.
Ludwig A. (2024). Sensory integration and self-perception in DPDR. Frontiers in Psychiatry.
Phillip J. (2025). Network dysregulation in depersonalization-derealization disorder. NeuroImage: Clinical.

Sometimes, when reading neurobiological explanations, it may feel like you need to “track” what is happening in your brain or understand it in real time.
It’s important to note: these models are not meant for real-time self-monitoring.
They describe processes at the level of scientific research.
In actual experience, it is often more helpful to rely not on analysis,
but on simple forms of presence — the body, action, and the external environment.
Understanding can reduce fear.
But the attempt to constantly “explain yourself”
can sometimes reinforce fixation.