Anosodiaphoria

Contents

  1. Definition and Clinical Features
  2. Differential Diagnosis
  3. References

Definition and Clinical Features

Anosodiaphoria is a neurological disorder of body schema characterized by a striking emotional indifference to a severe physical deficit. The term was first introduced by the French neurologist Joseph Babinski in 1914. In this condition, patients are intellectually aware of and can verbally acknowledge a clinical problem (such as a profound hemiparesis or paralysis of a limb), yet they fail to show any appropriate emotional concern, distress, or anxiety regarding their disability.

Clinically, anosodiaphoria often follows a stage of anosognosia (a complete denial or unawareness of the deficit). As the patient begins to recover or is repeatedly confronted with their deficit, the absolute denial (anosognosia) may transition into an unemotional acknowledgment (anosodiaphoria).

Patient demonstrating lack of concern for a paralyzed limb

In anosodiaphoria, a patient may be fully aware of a severe deficit, such as a paralyzed arm, yet display a striking emotional indifference toward it.

Differential Diagnosis

Anosodiaphoria must be distinguished from la belle indifférence. While both conditions describe a lack of concern for acknowledged disabilities, their origins are fundamentally different:

  • Anosodiaphoria: Results from an organic brain lesion, most commonly affecting the right cerebral hemisphere (specifically the parietal lobe or frontoparietal networks).
  • La belle indifférence: Is associated with functional neurological symptom disorder (conversion disorder) and is psychogenic in origin, occurring in the absence of a structural brain lesion.

 

References

Babinski JM. Contribution à l’étude des troubles mentaux dans l’hémiplégie organique cerebrale (anosognosia). Revue Neurologique 1914; 12: 845-848

 

Cross References

Anosognosia; Belle indifférence