Within the depth-psychology corpus, the neocortex figures as the anatomical seat of rational cognition, reflective thought, and top-down regulatory capacity — the uppermost tier of Paul MacLean’s triune brain model that organises much of the clinical neuroscience literature absorbed by this tradition. Authors such as Ogden deploy the term therapeutically, framing the neocortex as a resource that trauma and subcortical ‘hijacking’ can temporarily disable, thereby producing the dissociation between felt bodily experience and conscious narrative that defines post-traumatic symptomatology. Van der Kolk positions it explicitly against the ‘emotional brain,’ underscoring its comparative complexity and its tendency to draw slower, more discriminating conclusions than the limbic system’s rapid approximations. McGilchrist situates it within a broader cortical architecture of opponent processors, while LeDoux introduces historiographic nuance by noting that the designation ‘neocortex’ — coined to signal evolutionary novelty — has itself been challenged, with ‘isocortex’ proposed as a more neutral alternative. Panksepp’s affective neuroscience complicates the hierarchy further by demonstrating that removal of the neocortex does not abolish instinctual emotional behaviour, displacing the cortex from any simple position of executive sovereignty. The term thus anchors a persistent tension in this literature between top-down and bottom-up models of mind, between cortical reason and subcortical affect, and between integrative ideals and the realities of dysregulation.
HIJACKING OF YOUR NEOCORTEX explores how the triggering of subcortical reactions can interfere with cortical functioning and cause a variety of symptoms.
Ogden frames neocortical ‘hijacking’ by subcortical activation as the central neurological explanation for trauma symptoms, making this concept a direct therapeutic teaching point.
, Sensorimotor Psychotherapy Interventions for Trauma and, 2015thesis
The emotional brain’s cellular organization and biochemistry are simpler than those of the neocortex, our rational brain, and it assesses incoming information in a more global way.
Van der Kolk contrasts the neocortex’s complex, discriminating processing with the emotional brain’s rapid, global approximations, establishing the structural basis for rational versus reactive responding.
, The Body Keeps the Score: Brain, Mind, and Body in the Healing of Trauma, 2014thesis
The mere removal of the neocortex does not lead to major deficits in instinctual behaviors, although such animals are certainly not very bright.
Panksepp challenges cortical supremacy by showing that instinctual emotional behaviour survives neocortical removal, relocating emotional agency to subcortical circuits.
, Affective Neuroscience The Foundations of Human and Animal, 1998thesis
The neocortex (also called the cerebral cortex, frontal cortex, or neomammalian brain) is divided into the left and right
Ogden provides the foundational anatomical definition of the neocortex within the triune brain framework used throughout sensorimotor psychotherapy psychoeducation.
, Sensorimotor Psychotherapy Interventions for Trauma and, 2015thesis
We can examine our emotions (mammalian brain); our heart rate, sensations, breathing, and impulses (reptilian brain); and our thoughts or conclusions we are drawing (neocortex).
Ogden situates the neocortex as the locus of thought and interpretive conclusions within a clinical mindfulness practice that distinguishes the three processing levels.
, Sensorimotor Psychotherapy Interventions for Trauma and, 2015supporting
The neocortex was so named because it was thought to be a new addition with the evolution of mammals, a view that has since been challenged. Some now prefer the more neutral term ‘isocortex’ to avoid this evolutionary implication.
LeDoux historicises the term ‘neocortex,’ flagging its evolutionary assumptions as scientifically contested while retaining it for its currency in the field.
, Anxious: Using the Brain to Understand and Treat Fear and Anxiety, 2015supporting
The thalamus, a structure that plays a key role in relaying sensory information to the limbic system and neocortex, thus eventually leading to the integration of sensory information.
Ogden identifies the thalamus as the mediating relay that enables integration between subcortical and neocortical processing, underscoring the neocortex’s dependence on upstream sensory routing.
, Trauma and the Body: A Sensorimotor Approach to Psychotherapy, 2006supporting
How do each of these body patterns affect your thoughts neocortex? (e.g., When I get tension in my shoulders, I start to think that no one is on my side.)
Ogden operationalises the neocortex as the domain of thought and belief in a client worksheet that tracks bottom-up influence from body to cognition.
, Sensorimotor Psychotherapy Interventions for Trauma and, 2015supporting
The frontal lobes, the most recently evolved part of the neocortex, which occupy a much bigger part of the brain in humans than in our animal relatives, mediate most of the sophisticated activities that mark us out as human — planning, decision making, perspective taking, self-control.
McGilchrist locates the frontal lobes as the evolutionary apex of the neocortex, linking cortical expansion to the distinctively human capacities that Freud’s structural conflicts implicate.
, The Master and His Emissary: The Divided Brain and the Making of the Western World, 2009supporting
The ‘neocortex’ is not really new to the mammalian brain. Some now prefer the more neutral term ‘isocortex’ to avoid this evolutionary implication.
Barrett cites the scientific challenge to the triune brain’s evolutionary framing of the neocortex as a key example of ‘successful misconceptions’ that have shaped popular emotion theory.
, How Emotions Are Made: The Secret Life of the Brain, 2017supporting
Although the human brain has evolved in incredible ways and has expanded to a great size, it has retained some of the basic features of its ancestral relationship to reptiles, early mammals, and recent mammals.
Berger invokes MacLean’s triune model as the biological backdrop for emotional regulation difficulties, implicitly positioning the neocortex as the most recently evolved tier requiring cultural and relational development.
Jung understood that this collective unconscious was not an abstract and symbolic notion, but rather a concrete physical/biological reality… it should be possible to ‘peel’ the collective unconscious, layer by layer, until we came to the psychology of the worm.
Levine contextualises Jungian phylogenetic layering as a precursor to neurobiological models of cortical-subcortical hierarchy, gesturing toward the neocortex as the outermost psychological stratum.
, In an Unspoken Voice: How the Body Releases Trauma and Restores Goodness, 2010aside