Cortical representation occupies a pivotal position in the depth-psychology corpus precisely because it stands at the intersection of neurobiological mechanism and phenomenological meaning. The term names the brain’s capacity to instantiate, in spatially organized cortical tissue, the body’s sensory surfaces, visceral states, emotional tonalities, and perceptual objects — but the corpus reveals deep disagreement about what that instantiation entails. Kandel documents the classical discovery of somatotopic and tonotopic maps, stressing that cortical representation is always a distortion of bodily topology proportional to functional importance rather than physical extent. Damasio pushes further, arguing that cortical representations are not fixed facsimiles but reconstructive events — dispositional patterns that fire back onto early sensory cortices to reconstitute approximate images. Craig situates cortical representation at the apex of an interoceptive hierarchy: the dorsal insular cortex constitutes a primary interoceptive image of the body’s homeostatic condition, whose progressive re-representation in the anterior insula grounds awareness itself. LeDoux raises the critical tension: can subcortical affect exist without cortical representation, or must feeling be cortically instantiated to be consciously experienced? Gallagher and Thompson interrogate the very semantics of representation, asking whether cortical ‘feature detectors’ truly represent or merely respond within an autonomous relational dynamic. What unites these voices is the recognition that cortical representation is not a passive mirror but an active, experience-modifiable, and hierarchically organized construction of self and world.
each part of the body is represented in proportion to its importance in sensory perception, not to its size. Thus the fingertips and the mouth…have a disproportionately larger representation than does the skin of the back
Kandel establishes the foundational principle that cortical representation is a functional distortion of bodily topology, scaled to the density of sensory innervation rather than to anatomical extent.
, In search of memory the emergence of a new science of mind, 2006thesis
the dorsal insular cortex contains a sensory representation of the small-diameter afferent activity that relates to the physiological condition of the entire body. This cortical region seems to constitute a primary interoceptive image of homeostatic afferents.
Craig identifies the dorsal insular cortex as the site of a primary cortical representation dedicated to interoceptive and homeostatic body signals, within which distinct sensations including pain, temperature, and visceral feelings are embedded.
, How Do You Feel? Interoception: The Sense of the Physiological Condition of the Body, 2002thesis
What dispositional representations hold in store in their little commune of synapses is not a picture per se, but a means to reconstitute ‘a picture.’ If you have a dispositional representation for the face of Aunt Maggie, that representation contains not her face as such, but rather the firing patterns which trigger the momentary reconstruction of an approximate representation
Damasio argues that cortical representation is not a stored image but a set of dispositional firing patterns capable of reconstructing an approximate representation in early sensory cortices, emphasizing the reconstructive and distributed nature of the process.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994thesis
the AIC and the adjoining frontal operculum…contains an ultimate representation of the sentient self in humans…the cortical basis for awareness is an ordered set of representations
Craig proposes that the anterior insular cortex houses an ultimate cortical representation of the sentient self, functioning as the neural substrate of awareness through an ordered hierarchy of re-representations.
, How Do You Feel — Now? The Anterior Insula and Human Awareness, 2009thesis
brain activity that signals body-state changes and transiently forms a topographically organized representation in early somatosensory cortices; and a representation, located in a convergence zone, that receives signals from those first two sites of brain activity
Damasio describes how cortical representation of body states and of causative entities are coordinated through convergence zones, forming the neural substrate for the somatic marker mechanism underlying emotion and reason.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994thesis
all sensory information is organized topographically in the brain in the form of precise maps of the body’s sensory receptors, such as, the retina of the eye, the basilar membrane in the ear, or the skin on the body surface
Kandel articulates the general principle that all sensory modalities share a common organizational logic of topographic cortical representation, forming maps isomorphic with peripheral receptor arrays.
, In search of memory the emergence of a new science of mind, 2006thesis
These convergent findings are consistent with the concept that the re-representation of the cortical interoceptive image
Craig consolidates neuroimaging evidence for progressive re-representation of interoceptive cortical images in anterior insular regions associated with subjective emotional states including anger, disgust, and sexual arousal.
, How Do You Feel? Interoception: The Sense of the Physiological Condition of the Body, 2002supporting
it is possible to uncover, in a monkey’s visual cortex, a strong correlation between the structure of a visual stimulus (e.g., a circle or a cross) and the pattern of activity it evoked
Damasio draws on comparative neurophysiology to illustrate the structural fidelity between mapped cortical patterns and the external stimuli that generate them, grounding his broader theory of brain maps as the basis of images and mind.
, Self Comes to Mind: Constructing the Conscious Brain, 2010supporting
Certain kinds of cortical neurons are often described as feature detectors because they respond preferentially…to various types of stimuli, such as edges, lines, and moving spots. Such neurons are said to ‘represent’ features of objects
Thompson critically examines the standard feature-detector account of cortical representation, questioning whether the heteronomous observer-dependent notion of information adequately captures what cortical neurons actually do within an autonomous system.
, Mind in Life: Biology, Phenomenology, and the Sciences of Mind, 2007supporting
because these subjective experiences are assessed by verbal reports in human studies, the feelings reported cannot be said to be raw, primitive feelings. To be reported they must reflect representation of the information in cortical processing systems.
LeDoux argues that any consciously reportable feeling necessarily involves cortical representation, raising the unresolved question of whether subcortical affective states are conscious prior to or only through cortical instantiation.
, Anxious: Using the Brain to Understand and Treat Fear and Anxiety, 2015supporting
recall of objects and events relies, at least in part, on activity near the points where sensory signals enter the cortex, as well as near motor output sites
Damasio marshals lesion and neuroimaging evidence to support the claim that memory recall reactivates the same early cortical sites engaged during original perception, demonstrating the reconstructive function of cortical representation in imagery and memory.
, Self Comes to Mind: Constructing the Conscious Brain, 2010supporting
the lines in a brain map are not drawn with quill or pencil; they are, rather, the result of the momentary activity of some neurons and of the inactivity of others. When certain neurons are ‘on,’ in a certain spatial distribution, a line is ‘drawn’
Damasio explains the dynamic and transient nature of cortical representation, emphasizing that cortical maps are momentary activity patterns rather than fixed inscriptions, generated by selective neural activation across a layered cortical grid.
, Self Comes to Mind: Constructing the Conscious Brain, 2010supporting
phantom experience may be the result of stimulated restructured synaptic connections and/or neural structures that have settled in a cortical area originally meant to represent the absent limb
Gallagher applies the concept of cortical representation to phantom limb phenomena, arguing that reorganization of somatosensory cortical maps accounts for phantom experience in cases of congenital absence of limbs.
, How the Body Shapes the Mind, 2005supporting
there is no single cortical area to which all other cortical areas report exclusively, either in the visual or in any other system. In sum, the cortex must be using a different strategy
Kandel dismisses the homuncular fallacy of a master cortical representation area, arguing instead that cortical representation is distributed and requires a fundamentally different integrative logic than a hierarchical reporter model.
, In search of memory the emergence of a new science of mind, 2006supporting
archetypes ‘as such’ and archetypal ‘images’ are instantiated via a prediction cascade over various cortical and subcortical systems…via a ‘trilogical interplay’ involving the high-level cortex, the low-level cortex, and subcortical/affective systems
McGovern extends the concept of cortical representation into Jungian theory, proposing that archetypal images and structures are instantiated through hierarchically organized cortical and subcortical predictive processing cascades.
, Eigenmodes of the Deep Unconscious: The Neuropsychology of Jungian Archetypes and Psychedelic Experience, 2025supporting
a sensation becomes a feeling, a vivid feeling that can be remembered, by being ‘felt’ in the living body, that is, in direct proportion to autonomic activation and the active feeling state of homeostatic sentience
Craig argues that the transition from interoceptive cortical representation to subjective feeling depends on integration with autonomic activation, such that the vividness of a feeling is proportional to its grounding in living bodily states.
, How Do You Feel? An Interoceptive Moment with Your Neurobiological Self, 2014supporting
Signals from each sense are first processed within specialized ‘early’ cortical regions…but those signals or related signals are subsequently integrated, as needed, in association cortices of the temporal, parietal, and even frontal regions.
Damasio provides a technical overview of the hierarchical organization of cortical representation across sensory-specific and multimodal association regions, with bidirectional pathways enabling convergence and divergence of representational content.
, The strange order of things life, feeling, and the making, 2018aside
There is damage to a select group of right cerebral cortices which are known as somatosensory (from the Greek root soma, for body; the somatosensory system is responsible for both the external sen…
Damasio locates anosognosia in damage to right somatosensory cortices, using pathological breakdown of cortical representation of body states as evidence for the neural basis of self-awareness and the sense of bodily integrity.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994aside