Hierarchical information processing stands as a foundational organizing concept within the depth-psychology corpus, bridging evolutionary neuroscience, developmental psychoanalysis, and somatic-trauma theory. The term designates the principle that the brain processes experience at stratified, functionally distinct levels—sensorimotor, emotional, and cognitive—each with its own temporal, representational, and regulatory logic, and each capable of influencing, inhibiting, or amplifying the others. Ogden, drawing on Wilber and MacLean’s triune brain model, situates the concept at the clinical heart of sensorimotor trauma therapy, arguing that trauma systematically disrupts integration across these levels, trapping clients in dysregulated lower-order processing. Schore approaches the same architecture from the perspective of early relational neurobiology, tracing how orbitofrontal-limbic circuits constitute the hierarchical apex at which maternal affect regulation sculpts the infant’s emergent self-regulatory capacities. Barrett’s predictive-processing account reconfigures the hierarchy as a cascade of concept compression and error correction flowing between cortical layers. McGovern extends the logic into Jungian territory, proposing that archetypal content becomes salient precisely when hierarchical generative models are disrupted under conditions such as psychedelic experience. Khalsa imports Bayesian formalism, specifying that allostatic regulation operates through hierarchical belief modulation. Across these divergent frameworks, the central tension concerns directionality: whether higher cortical levels govern lower ones, or whether subcortical arousal states seize command of the entire system—a question with direct clinical stakes for every depth-psychological encounter with trauma, affect, and the body.