Anosognosia for Plegia: Specificity, Extension, Partiality and Disunity of Bodily Unawareness

  title={Anosognosia for Plegia: Specificity, Extension, Partiality and Disunity of Bodily Unawareness},
  author={Anthony J. Marcel and Richard Tegn{\'e}r and Ian Nimmo-Smith},

Blissfully unaware: Anosognosia and anosodiaphoria after acquired brain injury

  • P. Gasquoine
  • Psychology, Medicine
    Neuropsychological rehabilitation
  • 2016
All manifestations of anosognosia are considered as a unitary phenomenon with differing clinical characteristics dictated by variability in linked cognitive impairments, and anosodiaphoria is considered as an associated symptom, resulting from the same psychological and neuropathological factors.

Explicit and implicit anosognosia or upper limb motor impairment

Implicit awareness in anosognosia for hemiplegia: unconscious interference without conscious re-representation.

The combination of the behavioural and neural findings suggests that an explicit, affectively personalized sensorimotor awareness requires the re-representation of sensorsimotor information in the insular cortex, with possible involvement of limbic areas and basal ganglia circuits.

Anosognosia and denial after right hemisphere stroke

This chapter will focus on anosognosia associated with right hemisphere stroke, that is mainly anos Cognosia for hemiplegia, and/or hemianopia.

Anosognosia for hemiplegia after stroke is a multifaceted phenomenon: a systematic review of the literature.

The need for a multidimensional assessment procedure for anosognosia following stroke is highlighted and some potentially productive directions for future research about unawareness of illness are suggested.

Unawareness for Motor Impairment and Distorted Perception of Task Difficulty

A new assessment measure, the ECT (Errand Choice Test), where patients are asked to judge task difficulty rather than estimate their own impairment is developed, suggesting that anosognosic patients’ ability to perceive the complexity of each task per se is not altered.



The pathogenesis of anosognosia for hemiplegia

The pathogenesis of anosognosia for hemiplegia may involve failure to discover paralysis because proprioceptive mechanisms that ordinarily inform an individual about the position and movement of limbs are damaged, and the patient, because of additional cognitive defects, lacks the capacity to make the necessary observations and inferences to diagnose the paralysis.

Anosognosia and asomatognosia during intracarotid amobarbital inactivation

Dissociations of perception of location, weakness, and ownership of the affected limb are frequent, as well as misperceptions of location and body part identity, which suggest that multiple mechanisms are involved.


There is a fair consensus as to what clinical manifestations are included under the rubric of anosognosia, including verbal negation of the paralyzed limbs, denial of their existence, and delusions, illusions, and hallucinations concerning the affected side.

Anosognosia for hemiplegia, neglect dyslexia, and drawing neglect: Clinical findings and theoretical considerations

Abstract In this paper different models of anosognosia are confronted and data concerning denial behaviors are presented that were collected on a selected population of right brain-damaged patients

Denial of hemiplegia: an investigation into the theories of causation.

Patients with denial of hemiplegia following acute CVA have significantly more white matter involvement, particularly the corona radiata, than those with neglect and there was also a trend that patients with denial are more likely to have lesions in the caudate.

Awareness of and memory for arm weakness during intracarotid sodium amytal testing.

The suggestion is made that the right hemisphere may have a specific mnestic function for arm weakness, and presumably for hemiplegia, additional to the gnostic function.

Anosognosia and extrapersonal neglect as predictors of functional recovery following right hemisphere stroke

It is shown that the presence of anosognosia is the worst prognostic factor for the motor and functional recovery from left hemiplegia due to stroke and that patients with extrapersonal neglect only have the same prognosis as patients without neuropsychological disorders.

Anosognosia during intracarotid barbiturate anesthesia

Observations provide insight into the neuropsychological basis of anosognosia for hemiparesis (AHP), arguing against earlier explanations based upon psychological denial, global cognitive disturbance, or emotional indifference.


  • R. GilliattR. Pratt
  • Psychology, Medicine
    Journal of neurology, neurosurgery, and psychiatry
  • 1952
A case of right-sided cerebral thrombosis followed by left hemiplegia with extensive sensory loss and anosognosia, and accompanied by profound impairment of visual-spatial perception and performance is reported.