Anosognosia — the radical, neurologically grounded inability to acknowledge one’s own disease or deficit — occupies a peculiar and revealing position in the depth-psychology corpus. First systematically described by Babinski in 1914, the condition challenges any naively psychodynamic account of denial: Damasio insists across multiple works that the syndrome is emphatically not a motivated, adaptive psychological defense but rather the direct consequence of disrupted somatosensory self-mapping, typically following right-hemisphere stroke. For Damasio, the anosognosic patient illustrates what happens when the body can no longer supply the feeling-based signals upon which coherent self-awareness and rational decision-making depend; the result is not merely motor unawareness but a global collapse of self-modelling, forecasting, and appropriate emotional response. McGilchrist enlarges this neurological reading into a hemispheric argument: anosognosia is almost invariably a consequence of right-hemisphere damage, because it is the right hemisphere that anchors reality-testing, registers what is novel or discrepant, and inhibits the left hemisphere’s tendency toward confabulation and incorrigible self-certainty. Merleau-Ponty, from a phenomenological vantage, complicates both accounts by arguing that the anosognosic patient does in fact possess a preconscious knowledge of the deficit — the avoidance itself presupposes an intuition of what is being evaded. Craig situates anosognosia within the interoceptive architecture of the anterior insular cortex. Taken together, these voices make anosognosia a touchstone for debates about self-awareness, body image, consciousness, and the neural substrates of knowing.
Anosognosia, as the condition is known, is one of the most eccentric neuropsychological presentations one is likely to encounter… denotes the inability to acknowledge disease in oneself.
Damasio introduces anosognosia as a structural neurological failure of self-acknowledgment, explicitly rejecting psychodynamic denial as its explanation.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994thesis
Those who are fond of ‘psychological’ explanations have long thought that this denial of illness is psychodynamically motivated… They are wrong.
Damasio emphatically distinguishes anosognosia from psychological defense mechanisms, grounding it instead in neurological disruption of body-state representation.
, The Feeling of What Happens: Body and Emotion in the Making of Consciousness, 1999thesis
Somehow, what does not come naturally and automatically through the primacy of feeling cannot be maintained in the mind.
Damasio argues that anosognosia demonstrates the foundational role of feeling-based body signals in sustaining any coherent awareness of one’s own condition.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994thesis
The anosognosic is not simply ignorant of the existence of his paralysed limb: he can evade his deficiency only because he knows where he risks encountering it.
Merleau-Ponty contends that the anosognosic patient retains a preconscious, tacit knowledge of the deficit — the very act of avoidance presupposes this knowledge.
, Phenomenology of Perception, 1962thesis
These patients exhibit not just neglect, but what is called anosognosia… unwillingness to acknowledge a deficit… This is almost always consequent on right hemisphere damage.
McGilchrist frames anosognosia as characteristically a right-hemisphere deficit, linking it to the broader failure of reality-testing and self-correction that follows right-sided lesions.
, The Matter With Things: Our Brains, Our Delusions and the Unmaking of the World, 2021thesis
These patients exhibit not just neglect, but what is called anosognosia… unwillingness to acknowledge a deficit… This is almost always consequent on right hemisphere damage.
Duplicate source confirms McGilchrist’s hemispheric localisation of anosognosia as a right-hemisphere pathology involving motivated or structural non-acknowledgment of deficit.
, The Matter with Things: Our Brains, Our Delusions, and the Unmaking of the World, 2021thesis
Patients with the type of anosognosia described above have damage in the right hemisphere… There is damage to a select group of right cerebral cortices which are known as somatosensory.
Damasio specifies the neuroanatomical substrate of anosognosia as right somatosensory cortices, confirming the organic basis and its disruption of body-image representation.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994supporting
Unable to realize how profoundly impaired they are, these patients show little… their opportunity to place themselves in harm’s way is drastically reduced.
Damasio details the practical decision-making consequences of anosognosia, showing that the deficit extends beyond motor unawareness to impaired judgment and self-management.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994supporting
The oblivion that anosognosic patients express toward their sick limbs is matched by the lack of concern they show for their overall situation.
Damasio extends the scope of anosognosia beyond limb unawareness to encompass a pervasive emotional and situational indifference, broadening its relevance to theories of self.
, The Feeling of What Happens: Body and Emotion in the Making of Consciousness, 1999supporting
He has lost, not just knowledge of the body now, but of it at any time, past, present or future… both the perception and the previous knowledge of his left side were lost to him.
McGilchrist illustrates how anosognosia involves a retroactive erasure of bodily memory, not merely a present-tense perceptual gap, representing a fundamental failure of imaginative self-modelling.
, The Matter with Things: Our Brains, Our Delusions, and the Unmaking of the World, 2021supporting
Not only has the patient lost the perception of the left half of his body, and knows nothing of his paralysis, he has also … forfeited the memory of the left half of his body.
McGilchrist uses a clinical case to show that anosognosia annihilates not only present bodily awareness but the entire stored representation of the affected body region.
, The Matter With Things: Our Brains, Our Delusions and the Unmaking of the World, 2021supporting
Neurologists call this unawareness anosognosia. Some express hatred or disgust for the paralysed limb and may attack it, a phenomenon known as misoplegia.
Mizen situates anosognosia within a clinical spectrum of disturbed body-ownership phenomena — alongside misoplegia and somatoparaphrenia — connecting neurological unawareness to psychodynamic questions of self and alien self.
, The Self and alien self in psyche and somasupporting
Recent clinical and anatomical correlations in patients with anosognosia for hemiplegia and hemianaesthesia have focused on the insula.
Craig locates the neural correlate of anosognosia specifically in the anterior insula, proposing that disruption of interoceptive integration at this site underlies the syndrome.
, How Do You Feel — Now? The Anterior Insula and Human Awareness, 2009supporting
Though the left hemisphere had no clue, it would not be satisfied to state it did not know. It would guess, prevaricate, rationalize, and look for a cause and effect, but it would always come up with an answer.
McGilchrist presents confabulation — the left hemisphere’s compensatory narrative-making — as the functional counterpart to the anosognosic unawareness produced by right-hemisphere damage.
, The Matter With Things: Our Brains, Our Delusions and the Unmaking of the World, 2021supporting
The right hemisphere does not do this. It is totally truthful… The neuropsychologist Michael Gazzaniga calls the left hemisphere ‘the interpreter’, because, he says, it makes up the stories that fill in the gaps.
McGilchrist contrasts the right hemisphere’s honest reality-tracking with the left hemisphere’s rationalising confabulation, contextualising anosognosia within his broader hemispheric model.
, The Matter with Things: Our Brains, Our Delusions, and the Unmaking of the World, 2021supporting
Compare these two exchanges… one with a hemianopic patient and one with a neglect patient… the patient with the visual disturbance… ‘Yes, my eyesight on the left is bad.’
McGilchrist uses a clinical contrast between aware hemianopia and unaware neglect to demonstrate that anosognosia is qualitatively distinct from simple sensory loss.
, The Matter with Things: Our Brains, Our Delusions, and the Unmaking of the World, 2021supporting
When a patient develops an inability to recognize familiar faces, or see color, or read… the description they offer of the phenomenon… is that something is happening to them… they ‘locate’ the problem to a part of their persons which they are surveying from the vantage point of their selfhood.
Damasio implicitly contrasts normal neurological self-awareness — patients who observe their deficits from a stable self-viewpoint — with anosognosia, where that observational vantage point has collapsed.
, Descartes’ Error: Emotion, Reason, and the Human Brain, 1994aside
anosognosia, 191, 207, 226
Craig’s index entry confirms that anosognosia is treated in multiple chapters of his interoception volume, particularly in relation to the anterior insula’s role in bodily self-awareness.
, How Do You Feel? An Interoceptive Moment with Your Neurobiological Self, 2015aside
Feinberg TE & Roane DM, ‘Anosognosia’, in TE Feinberg & MJ Farah (eds), Behavioral Neurology and Neuropsychology, McGraw-Hill Professional, 2003
McGilchrist’s bibliography cites Feinberg and Roane’s dedicated chapter on anosognosia, indicating the term’s established place within the neuropsychology of right-hemisphere pathology and self.
, The Matter With Things: Our Brains, Our Delusions and the Unmaking of the World, 2021aside